EntomoBrasilis

(823 Artigos indexados)

Idiopidae Simon, 1889 in the Brazilian Amazon: two new species and a new geographic record - (2024)

João Pedro Costa Gomes, Naila Amanda Sousa dos Santos, Marlus Queiroz Almeida, Nikolas Gioia Cipola, José Wellington de Morais

Volume: 17 - Issue: 0

Resumo. Idiopidae Simon, 1889 is mostly composed of spiders known as trapdoor spiders, which create structures for shelter, hunting and protection against possible predators (Mason et al., 2013). It is divided into three subfamilies: Arbanitinae Simon, 1903, with spiders restricted to Oceania, Genysinae Simon, 1903, occurring in India, Sri Lanka, Madagascar and South America, and Idiopinae Simon, 1889, from South America, Africa, East Middle and South to Southeast Asia (Raven 1985; World Spider Catalog 2023). Idiopidae is widely distributed throughout the world, however, only two genera are present in Brazil: Idiops Perty, 1833 and Neocteniza Pocock, 1895. In this work, we describe a new species for both genera present in Brazil and a new record of Idiops.

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Lepidoptera larvae (Insecta) responsible for herbivory on Vanilla spp. (Orchidaceae) in the Federal District, Brazil - (2024)

Alexandre Specht, Ranyse Barbosa Querino, Willian Rogers Ferreira de Camargo, Amabílio José Aires de Camargo, Wanderlei Antonio Alves de Lima, Zenilton de Jesus Gayoso Miranda Brasil

Volume: 17 - Issue: 0

Resumo. Given its culinary importance and high market value, the cultivation of Vanilla (Orchidaceae) has been expanding annually in Brazil. As observed in many crops, the increase in cultivated areas leads to a greater incidence of insects associated with species of this genus. This study reports the herbivory of larvae from Cremna thasus (Stoll, 1780) (Papilionoidea: Riodinidae: Riodininae), Hypercompe cunigunda (Stoll, 1781) (Noctuoidea: Erebidae: Arctiinae), and Spodoptera cosmioides Walker, 1858 (Noctuoidea: Noctuidae: Noctuinae) on Vanilla bahiana Hoehne and V. planifolia Andrews in the Federal District, Brazil. A list of 19 Lepidoptera species from six families associated with Vanilla spp. worldwide is provided based on a literature review. Most (n=15) of them exhibit polyphagous larvae. Given reports of exotic larvae spreading with orchids worldwide and the discussed larval polyphagy, we address precautions that producers of Vanilla and other orchids should take to reduce the incidence of insect pests in crops, especially in areas with intensive cropping systems involving annual commodities such as maize and soybean.

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Lestrimelitta chacoana Roig-Alsina, 2010 (Meliponini, Apidae) in a Semideciduous Atlantic Forest, Southern Brazil - (2024)

Julia Agostini Colombelli, Yoan Delky Ibañez Ojeda, Guilherme Schnell e Schühli, Fernando Cesar Vieira Zanella

Volume: 17 - Issue: 0

Resumo. The species of the cleptobiotic bee genus Lestrimelitta Friese, 1903 (Hymenoptera: Apidae) are generally known as a menace to Meliponiculture and Apiculture, that is why it is common to observe recommendations to beekeepers to avoid the proximity of their meliponaries with any Lestrimelitta hives. So, besides other anthropic pressures, the growth of beekeeping may represent a particular threat to its species. In this note we address the distribution of three species recorded in the triple border region of Argentina, Paraguay, and Brazil. One of these species, Lestrimelitta chacoana Roig-Alsina, 2010 (Hymenoptera: Apidae), previously described from the Argentinian Dry Chaco, is recorded for the Semideciduous Atlantic Forest in Southern Brazil where it was already expected to be found due to its previous record in a contiguous forest type in Northeastern Argentina. A discussion about the characters to differentiate it from two other species is made.

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Mosquitex, a new tool for capturing Aedes (Stegomyia) aegypti (Linnaeus, 1762) (Diptera: Culicidae) - (2024)

Cyro Guimarães, Thiago Dutra Dias, Simone Pereira Alves, Igor Luiz Souza da Cruz, Marise Maleck

Volume: 17 - Issue: 0

Resumo. The species Aedes (Stegomyia) aegypti (Linnaeus, 1762) (Diptera: Culicidae) is of great importance for human health, as it is responsible for the transmission of viruses that can cause dengue, chikungunya, zika and urban yellow fever. The proposal of this study is to test the efficiency of a new trap model in capturing and trapping Ae. aegypti based on favoring the insect's ecology. This trap model was analyzed regarding the attractiveness for egg-laying, and the trapping of larvae and consequently the adults. The tests were carried out using white traps (original version) and black traps (adapted from the original), both in field and laboratory conditions. In the field, the black traps showed 100% effectiveness compared to white traps, showing more positive results for the attractiveness of Ae. aegypti mosquito and adult imprisonment. According to the results for this trap model, from both test in the field and in the laboratory, it was concluded that this new product is effective in capturing Ae. aegypti and it guarantees mosquito trapping safety, also low-cost production, practicality, logistics and possibility of its use by the local population. After the validation and effectiveness of the trap “drinking-fountain like”, the definitive trap called Mosquitex was developed, which is brand new for this mosquito, with patent registration INPI - BR2020190112226 - 2019, and with the possibility of assisting in the control and monitoring of Ae. aegypti in urban areas.

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Moths (Lepidoptera: Heterocera) collected with light attractant in Serra de Itabaiana National Park, Sergipe, Brazil - (2024)

José Oliveira Dantas, Arivania Santos Pereira, Leandro Sousa Souto, Ana Paula Coelho Marques

Volume: 17 - Issue: 0

Resumo. Lepidoptera includes the butterflies and moths, being considered the second largest order of Insecta, with about 16% of all of the known species in this class. Few lists of Lepidoptera exist for the Northeast of Brazil, a poorly inventoried geographical area. This work had as main objective to accomplish a preliminary study of the moths collected with attractive light at the Parque Nacional Serra de Itabaina, Sergipe, Brazil, verifying the taxonomic diversity and abundance in the study area and analyzing some ecological aspects of the group. A total of 1,450 samples was collected, of which 447 were identified in 19 families. The remaining of the material consisted of 794 microlepidopterous and another 209 not identified specimens. The richness and abundance of lepidopterous did not vary significantly among the dry and rainy seasons (p> 0.05). However, the composition analysis (NMDS) separated the species in two distinct assemblages, but the similarity analysis indicated that this arrangement does not differ significantly (ANOSIM; p = 0.09; R = 0.22), indicating that the nocturnal lepidopterofauna of Serra de Itabaiana stays constant along the year. The time which has a larger number of collected lepidopterous, was from 18:00 to 21:00h. This is a preliminary study, but that serves as reference for other studies with Lepidoptera in Sergipe.

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New records of host plants of Bactrocera carambolae Drew & Hancock, 1994 (Diptera: Tephritidae) in Cooperative Republic of Guyana - (2024)

José Victor Torres Alves Costa, Jefferson Luiz de Aguiar Paes, Luiz Augusto Copati Souza, Patricia Peters, Paul Michael McWatt, Alies van Sauers-Muller, Maria do Socorro Miranda de Sousa, Ricardo Adaime

Volume: 17 - Issue: 0

Resumo. Specimens of Bactrocera carambolae Drew & Hancock, 1994 (Diptera: Tephritidae) were obtained from fruits of Averrhoa bilimbi L., Averrhoa carambola L. (Oxalidaceae), Malpighia emarginata DC. (Malpighiaceae), and Psidium guajava L. (Myrtaceae), from a survey carried out in Lethem, Republic of Guyana. This is the first record of B. carambolae in A. bilimbi, M. emarginata and P. guajava in the country.

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New Records of Loxosceles amazonica Gertsch, 1967 (Arachnida: Araneae: Sicariidae) from Tocantins, Brazil with Description of Female Genitalia Variation - (2024)

Kassia Madaleno, Lidianne Salvatierra

Volume: 17 - Issue: 0

Resumo. The knowledge of arachnofauna from Tocantins, Brazil, is still incipient. The present communication expands the known geographical distribution of Loxosceles amazonica Gertsch, 1967 (Arachnida: Araneae: Sicariidae) in Brazilian Cerrado. The brown spider specimens were sampled in Dianópolis municipality and Cristalândia municipality both in Tocantins State, Brazil, between 2022 and 2024. Also, we describe a new variation of the epigynum of L. amazonica. Mapping the distribution of Loxosceles Heineken & Lowe, 1832 species in Brazil is crucial for public health, aiding in prevention and timely treatment of loxoscelism caused by brown spider bites.

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New species of Bolbapium Boucomont, 1910 (Coleoptera: Geotrupidae) from Brazil - (2024)

Caique Dantas, André da Silva Ferreira, Freddy Bravo

Volume: 17 - Issue: 0

Resumo. Bolbapium Boucomont, 1910 is a Neotropical genus of Geotrupidae with 22 known species. In this paper, we describe Bolbapium vazdemelloi sp. nov. in Southwestern Bahia, Brazil. This new species is distinguished from congeneric species by its unique combination of morphological characters: cephalic tubercle adjacent to each eye; pronotum with little expanded bidentate tubercle; parameres symmetric, with acute and divergent apex. The new species was incorporated into a previously published identification key for Bolbapium.

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Odonata Community in a transition area between Atlantic Forest and Cerrado, Southern Minas Gerais, Brazil - (2024)

Lara Guerra Rebello Amaral, Eike Daniel Fôlha Ferreira, Tomás Matheus Dias de Oliveira, Diogo Silva Vilela, Gabriel de Castro Jacques, Marcos Magalhães de Souza

Volume: 17 - Issue: 0

Resumo. The Atlantic Forest and Cerrado biomes are global biodiversity hotspots. Despite this, they are constantly losing their natural habitats, making it urgent to conduct fauna inventories for the conservation of taxa such as dragonflies (Odonata). These insects provide fundamental environmental services to both aquatic and terrestrial ecosystems and are poorly sampled in some regions of Minas Gerais state. In this regard, the present study aimed to inventory the Odonata community in the surroundings of Luminárias, a municipality located in southern Minas Gerais state, Brazil. This area consists of a transition between Cerrado and Atlantic Forest, with biotic and abiotic attributes suggesting the creation of a Conservation Unit (CU) to provide data on the distribution of this taxon for future conservation actions. The study was conducted between 2023 and 2024, in 10 locations, totaling 690 hours of sampling effort. Fifty-seven species were recorded, distributed among seven families, with four species at some risk of extinction or with insufficient data, according to the IUCN or ICMBio. Considering the significant richness of Odonata fauna obtained in this study, which includes threatened species, it is urgent to establish management actions for the protection of these populations, including the creation of a CU.

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Recent observations on the distribution of the endangered butterfly Eresia erysice erysice (Geyer, 1832) (Lepidoptera: Nymphalidae) - (2024)

Gabriel Vila-Verde, Jacques Hubert Charles Delabie

Volume: 17 - Issue: 0

Resumo. The Brazilian endemic butterfly Eresia erysice erysice (Geyer, 1832) (Lepidoptera: Nymphalidae) has been included in the Official List of Brazilian Endangered Fauna as critically endangered (CR). Until now, this rare butterfly has only been known to inhabit Atlantic Forest fragments in the “Hileia Baiana”. This paper presents updated information on occurrences of E. e. erysice. A male and a female specimens were collected in a disturbed forest fragment near the experimental fields of the Centro de Pesquisas do Cacau (CEPEC), Ilhéus, Bahia. These new findings indicate that the distribution boundary of this subspecies extends about 80 km more to the north and suggest that it is not as exclusive to forest habitats as previously thought.

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Record of Lepidoptera and Hemiptera as a food resource of Acutisoma longipes Roewer, 1913 (Arachnida; Opiliones) in the Cerrado, Brazil - (2024)

Maria Luiza Simões Silva, Igor Rodrigues de Castro, Felipe Barbosa Augusto de Freitas, Diogo Silva Vilela, Gabriel de Castro Jacques, Marcos Magalhães de Souza

Volume: 17 - Issue: 0

Resumo. Harvestmen are nocturnal arachnids, commonly found in humid forests, with omnivorous feeding behavior. There are records of different taxa in the diet of these arthropods, but data is still scarce for many species, especially in Cerrado areas. Thus, the objective of the present work is to report Lepidoptera and Hemiptera in the diet of the harvestman Acutisoma longipes Roewer, 1913, in Mata de Galeria in the Cerrado of Minas Gerais, Brazil. The records occurred randomly in the municipality of Luminárias, Minas Gerais, on October 10th and December 4th, 2023. In the first record, the species A. longipes was feeding on a moth (Lepidoptera: Erebidae). In the second record, the same species fed on a leafhopper, Mahanarva sp. (Hemiptera, Cercopidae). It was not possible to say whether these insects were preyed upon, usurped by other predators or found dead, but any of these hypotheses can be considered. This record contributes to increasing knowledge about the diet of harvestmen, especially in the Cerrado biome, where there is a need for more related studies.

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Taxonomic notes with update of records of Trigona (Dichrotrigona) Engel, 2021 (Hymenoptera: Apidae: Meliponini) - (2024)

Cristiano Feitosa Ribeiro, David Silva Nogueira, Marcio Luiz de Oliveira

Volume: 17 - Issue: 0

Resumo. In this paper, we provide taxonomic notes for species of the Trigona (Dichrotrigona) Engel, 2021, with additional photographs. An identification key and a distribution map of the species of this subgenus is also provided here. We also update records of Trigona (Dichrotrigona) sesquipedalis Almeida, 1984 (Hymenoptera: Apidae: Meliponini) with the first records for the state of Roraima, Brazil.

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When the predator becomes the prey: record of Mischocyttarus rotundicollis (Cameron, 1912) (Hymenoptera: Vespidae) feeding on a spider in southeastern Brazil - (2024)

Glauco Cássio de Sousa Oliveira, Igor Henrique da Silva, Diogo Silva Vilela, Marcos Magalhães de Souza

Volume: 17 - Issue: 0

Resumo. Social wasps are commonly considered generalists in their feeding habits, but there are genera with little information regarding their diet, such as Mischocyttarus de Saussure, 1853 (Hymenoptera: Vespidae), the most species-rich wasp genus in the world. The objective of this study is to report Mischocyttarus rotundicollis (Cameron, 1912) (Hymenoptera: Vespidae) feeding on a spider in the southeastern region of Brazil, aiming to expand information about its feeding behavior. The record occurred occasionally on September 23, 2023, in the state of Minas Gerais, Brazil, in the ecotone region between the Atlantic Forest and the Cerrado. The feeding of a species from the Araneidae family occurred in its web, and the individual of M. rotundicollis used the tarsi of its legs to cling to the silk threads of the web, which could suggest a specialization for the exploitation of this food resource. Our record provides further information on the feeding behavior and diet of M. rotundicollis and presents the first information on spider feeding by this species. Further studies are suggested to evaluate this possible hypothesis of specialization of the genus for foraging in spider webs.

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Ant functional groups and their effects on other insects in organic and conventional cropping areas - (2023)

Milene Andrade Estrada, Joabe Rodrigues Pereira, Ângela Alves de Almeida, André Barbosa Vargas, Fábio Souto Almeida

Volume: 16 - Issue: 0

Resumo. The present research aimed to study the functional groups of ants in organic and conventional cropping areas and assess their influence on the abundance of other insects in agroecosystems. Sampling was carried out in eight rural properties with organic, and eight with conventional crops in Paraíba do Sul, state of Rio de Janeiro, Brazil. Fifteen pitfall soil traps were installed to collect ants in each property, in April and May 2016. The ants collected were dry-mounted and identified. The insect abundances of the orders Coleoptera, Hemiptera, and Orthoptera were also obtained. Ants were classified into seven functional groups. The functional group with the largest number of species was “omnivores that inhabit the soil and the leaf litter,” followed by “omnivores that inhabit the soil, the leaf litter, and the plants.” The group “omnivores that inhabit the soil and the leaf litter” showed the highest abundance of ants in both types of crops. The mean richness of functional groups was significantly higher in organic than in conventional crops. We only observed the effect of the abundance of ants of the group “omnivores that inhabit the soil, the leaf litter, and the plants” on the abundance of coleopterans in conventional crops. Hence, areas with organic crops are more favorable for maintaining an ant fauna with higher functional diversity than areas using the conventional cropping system.

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Ant functional groups and their effects on other insects in organic and conventional cropping areas - (2023)

Milene Andrade Estrada, Joabe Rodrigues Pereira, Ângela Alves de Almeida, André Barbosa Vargas, Fábio Souto Almeida

Volume: 16 - Issue: 0

Resumo. The present research aimed to study the functional groups of ants in organic and conventional cropping areas and assess their influence on the abundance of other insects in agroecosystems. Sampling was carried out in eight rural properties with organic, and eight with conventional crops in Paraíba do Sul, state of Rio de Janeiro, Brazil. Fifteen pitfall soil traps were installed to collect ants in each property, in April and May 2016. The ants collected were dry-mounted and identified. The insect abundances of the orders Coleoptera, Hemiptera, and Orthoptera were also obtained. Ants were classified into seven functional groups. The functional group with the largest number of species was “omnivores that inhabit the soil and the leaf litter,” followed by “omnivores that inhabit the soil, the leaf litter, and the plants.” The group “omnivores that inhabit the soil and the leaf litter” showed the highest abundance of ants in both types of crops. The mean richness of functional groups was significantly higher in organic than in conventional crops. We only observed the effect of the abundance of ants of the group “omnivores that inhabit the soil, the leaf litter, and the plants” on the abundance of coleopterans in conventional crops. Hence, areas with organic crops are more favorable for maintaining an ant fauna with higher functional diversity than areas using the conventional cropping system.

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Characterization of entomogenic galls in areas of seasonal deciduous forest in Southwestern Bahia, Brazil - (2023)

Lúcio Flávio Freire Lima, Juvenal Cordeiro Silva Junior

Volume: 16 - Issue: 0

Resumo. Galls are small structures induced mostly by insects in different plant organs, and have different shapes and colorations. Knowledge on galls is still sparse in the semiarid region of Bahia. Therefore, the goal of this study was to characterize galls in fragments of seasonal deciduous forest. Sampling was performed in the Bahia municipalities of Boa Nova, Jequié, Poções and Vitória da Conquista. In each site, one fragment was chosen, and in each fragment, plots were established to survey galls on vegetation. We sampled 158 gall morphotypes, representing 49 (morpho) species distributed across 15 families of host plants. Myrtaceae and Malphigiaceae had the highest numbers of gall morphotypes. Most galls were collected from leaves, whereas the most common gall morphotypes were globoid and fusiform.

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Characterization of entomogenic galls in areas of seasonal deciduous forest in Southwestern Bahia, Brazil - (2023)

Lúcio Flávio Freire Lima, Juvenal Cordeiro Silva Junior

Volume: 16 - Issue: 0

Resumo. Galls are small structures induced mostly by insects in different plant organs, and have different shapes and colorations. Knowledge on galls is still sparse in the semiarid region of Bahia. Therefore, the goal of this study was to characterize galls in fragments of seasonal deciduous forest. Sampling was performed in the Bahia municipalities of Boa Nova, Jequié, Poções and Vitória da Conquista. In each site, one fragment was chosen, and in each fragment, plots were established to survey galls on vegetation. We sampled 158 gall morphotypes, representing 49 (morpho) species distributed across 15 families of host plants. Myrtaceae and Malphigiaceae had the highest numbers of gall morphotypes. Most galls were collected from leaves, whereas the most common gall morphotypes were globoid and fusiform.

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Chrysotus capellarii sp. nov., the first species of longipalpus group from Colombia (Diptera: Dolichopodidae) - (2023)

Matheus Mickael Mota Soares, Fernando Carvalho-Filho, Yardany Ramos-Pastrana

Volume: 16 - Issue: 0

Resumo. Chrysotus capellarii Soares & Carvalho-Filho sp. nov. is described and illustrated based on a single specimen collected in the department of Córdoba, Colombia, representing the first record of the longipalpus species group from the country (a photographic record is known from Costa Rica). The new species is easily recognized by the long palpus (about 2x longer than eye height) with a wide and oval apical lamella.

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Chrysotus capellarii sp. nov., the first species of longipalpus group from Colombia (Diptera: Dolichopodidae) - (2023)

Matheus Mickael Mota Soares, Fernando Carvalho-Filho, Yardany Ramos-Pastrana

Volume: 16 - Issue: 0

Resumo. Chrysotus capellarii Soares & Carvalho-Filho sp. nov. is described and illustrated based on a single specimen collected in the department of Córdoba, Colombia, representing the first record of the longipalpus species group from the country (a photographic record is known from Costa Rica). The new species is easily recognized by the long palpus (about 2x longer than eye height) with a wide and oval apical lamella.

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Collection of floral resources by bees in Solanum lycocarpum A.St.-Hil. (Solanaceae): interference of abiotic factors and need for buzzing behavior - (2023)

Paulo Roberto de Abreu Tavares, Glaucia Almeida de Morais, Michele Castro de Paula, Jessica Amaral Henrique, Leandro Pereira Polatto, Valter Vieira Alves Junior

Volume: 16 - Issue: 0

Resumo. The foraging activity of floral visitors is influenced by habitat conditions and abiotic factors. The aim of this research was to define the faunal composition of the visitor community in Solanum lycocarpum A.St.-Hil. (Solanaceae) and to evaluate the influence of abiotic factors on the flight activity of the predominant visitors. The capture of bees was conducted for 15 minutes from the beginning of each hour between 6:00 am and 6:00 pm in a cluster with 15 S. lycocarpum individuals during 10 days. Centridini was the predominant tribe of bees, with 83.5% of the total foraging recorded. About 66.5% of foraging was concentrated in the time interval between 8:00 am and 12:59 pm, characterized as a optimal foraging period. At 6:00 am and from 5:00 pm onwards, bees were discouraged from foraging. Only Epicharis flava Friese and Centris scopipes Friese were classified as predominant species. Centris scopipes was the only predominant species whose abiotic conditions interfered in the foraging activities. Since bee foraging records were developed in the summer, environmental conditions did not limit the foraging of most bees during the entire foraging period of the day.

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Collection of floral resources by bees in Solanum lycocarpum A.St.-Hil. (Solanaceae): interference of abiotic factors and need for buzzing behavior - (2023)

Paulo Roberto de Abreu Tavares, Glaucia Almeida de Morais, Michele Castro de Paula, Jessica Amaral Henrique, Leandro Pereira Polatto, Valter Vieira Alves Junior

Volume: 16 - Issue: 0

Resumo. The foraging activity of floral visitors is influenced by habitat conditions and abiotic factors. The aim of this research was to define the faunal composition of the visitor community in Solanum lycocarpum A.St.-Hil. (Solanaceae) and to evaluate the influence of abiotic factors on the flight activity of the predominant visitors. The capture of bees was conducted for 15 minutes from the beginning of each hour between 6:00 am and 6:00 pm in a cluster with 15 S. lycocarpum individuals during 10 days. Centridini was the predominant tribe of bees, with 83.5% of the total foraging recorded. About 66.5% of foraging was concentrated in the time interval between 8:00 am and 12:59 pm, characterized as a optimal foraging period. At 6:00 am and from 5:00 pm onwards, bees were discouraged from foraging. Only Epicharis flava Friese and Centris scopipes Friese were classified as predominant species. Centris scopipes was the only predominant species whose abiotic conditions interfered in the foraging activities. Since bee foraging records were developed in the summer, environmental conditions did not limit the foraging of most bees during the entire foraging period of the day.

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Description of the second species of Polletomyia Curler, 2020 (Diptera: Psychodidae) from the Brazilian Amazon - (2023)

Freddy Bravo, Maíra Xavier Araújo

Volume: 16 - Issue: 0

Resumo. Polletomyia Curler, 2020 is a Neotropical genus of Psychodidae that was established based on Polletomyia subulata Curler, 2020 from French Guiana. In this paper, we describe a second species of the genus from the Brazilian Amazon. The specimens were collected by the late Larry Quate, a psychodid expert, and are deposited at the Museu de Zoologia of Universidade Estadual de Feira de Santana. We provide illustrations and descriptions of both males and females of the new species.

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Description of the second species of Polletomyia Curler, 2020 (Diptera: Psychodidae) from the Brazilian Amazon - (2023)

Freddy Bravo, Maíra Xavier Araújo

Volume: 16 - Issue: 0

Resumo. Polletomyia Curler, 2020 is a Neotropical genus of Psychodidae that was established based on Polletomyia subulata Curler, 2020 from French Guiana. In this paper, we describe a second species of the genus from the Brazilian Amazon. The specimens were collected by the late Larry Quate, a psychodid expert, and are deposited at the Museu de Zoologia of Universidade Estadual de Feira de Santana. We provide illustrations and descriptions of both males and females of the new species.

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Does the corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) reproduce in hosts other than maize? - (2023)

Ademar Novais Istchuk, Paulo Roberto da Silva, Adomiro Roberto Pereira Borges, Taline Campos Nunes das Neves, Renata Ramos Pereira, Matheus Henrique Schwertner, Tamylin Kaori Ishizuka, Vanda Pietrowski

Volume: 16 - Issue: 0

Resumo. The corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) is a specialist insect vector of the corn stunting disease complex. This leafhopper has been reported from different overwintering plants, and more information is required regarding other potential Brazilian plants that may serve as reproductive hosts for this specie. The present study aimed to evaluate possible plants for leafhopper reproduction usually found near the maize fields and the D. maidis reproductive differences among maize genotypes. Three trials were conducted to assess D. maidis survival and oviposition on different maize genotypes and other potential host plants. Survival, nymph presence, oviposition, and nymph eclosion rates were observed. No nymphs were observed in plants other than maize. The number of D. maidis adults was influenced by the different maize inbreds, and the mean number of laid eggs varied across the tested maize materials. Oviposition and nymph emergence was observed in pearl millet [Pennisetum glaucum (L.) R. Br., Poaceae] when D. maidis adults were offered only this plant as substrate, although significantly lower than those recorded on maize. Our results suggest that eliminating maize plants in the off-season could be used as a tool to reduce D. maidis reproduction, thereby minimizing the vector population size in the following season.

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Does the corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) reproduce in hosts other than maize? - (2023)

Ademar Novais Istchuk, Paulo Roberto da Silva, Adomiro Roberto Pereira Borges, Taline Campos Nunes das Neves, Renata Ramos Pereira, Matheus Henrique Schwertner, Tamylin Kaori Ishizuka, Vanda Pietrowski

Volume: 16 - Issue: 0

Resumo. The corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) is a specialist insect vector of the corn stunting disease complex. This leafhopper has been reported from different overwintering plants, and more information is required regarding other potential Brazilian plants that may serve as reproductive hosts for this specie. The present study aimed to evaluate possible plants for leafhopper reproduction usually found near the maize fields and the D. maidis reproductive differences among maize genotypes. Three trials were conducted to assess D. maidis survival and oviposition on different maize genotypes and other potential host plants. Survival, nymph presence, oviposition, and nymph eclosion rates were observed. No nymphs were observed in plants other than maize. The number of D. maidis adults was influenced by the different maize inbreds, and the mean number of laid eggs varied across the tested maize materials. Oviposition and nymph emergence was observed in pearl millet [Pennisetum glaucum (L.) R. Br., Poaceae] when D. maidis adults were offered only this plant as substrate, although significantly lower than those recorded on maize. Our results suggest that eliminating maize plants in the off-season could be used as a tool to reduce D. maidis reproduction, thereby minimizing the vector population size in the following season.

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