Preferência alimentar de Dione juno juno (CRAMER, 1779) (Lepidoptera: Nymphalidae) por genótipos de maracujazeiro
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Data
2007-08-01
Autores
Angelini, Marina Robles
Boiça Júnior, Arlindo Leal [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Fruticultura
Resumo
O presente trabalho teve por objetivo determinar o efeito de genótipos de maracujazeiro quanto à atratividade e à não-preferência para alimentação de lagartas de Dione juno juno, em diferentes idades, através de testes com e sem chance de escolha. Os experimentos foram conduzidos no Departamento de Fitossanidade da FCAV/UNESP de Jaboticabal-SP, sob condições ambientais controladas (T=26=±=1°C=U.=R.= 60 ± 10% e fotofase = 14 horas), utilizando-se dos genótipos Passiflora edulis, P. gibertii, P. alata, Sul Brasil, IAC-275, Flora FB 300, P. serrato-digitata, P. edulis f. flavicarpa, Maguary FB-100 e P. foetida. Para o teste com chance de escolha, foram utilizadas placas de Petri, onde foram distribuídos, de forma eqüidistante, um disco foliar (3,2 cm) de cada genótipo estudado e liberando-se em seguida, no centro da placa, 5 lagartas recém-eclodidas ou uma lagarta com 10 dias de idade por material. No teste sem chance de escolha, foi colocado apenas um disco de cada genótipo por placa de Petri (9 cm de diâmetro), mantendo-se o mesmo padrão de infestação utilizado no teste com chance. As avaliações foram realizadas em duas etapas, sendo que, na primeira, avaliou-se a atratividade, contando o número de lagartas em cada material a 1; 3; 5; 10; 15; 30; 60; 120; 240 minutos e 24 horas após a liberação das mesmas. Na segunda etapa, observou-se o consumo foliar 24 horas após o início do teste. O genótipo menos atrativo às lagartas recém-eclodidas e de 10 dias de idade foi P. alata em testes com e sem chance de escolha. O genótipo P. alata foi o menos consumido em teste com chance de escolha, sendo que, no teste sem chance, P. alata e P. foetida destacaram-se como os menos consumidos para as duas fases larvais.
This aim of this study was to evaluate the effect of passion fruit genotypes on the attractiveness and feeding non-preference of D. juno juno larvae, through free-choice and no-choice tests. The experiments were carried out at FCAV/UNESP in Jaboticabal-SP, under lab conditions (T=26 ± 1°C, RH = 60 ± 10% and photophase = 14 hours), with Passiflora edulis, P. gibertii, P. alata, Sul Brasil, IAC-275, Flora FB 300, P. serrato-digitata, P. edulis f. flavicarpa, Maguary FB-100 and P. foetida genotypes. In free-choice test, Petri dishes with leaf disks (3.2 cm) of each genotype were used and distributed at equal distance from the center, and 5 new hatched larvae or one 10-day old larva per genotype were released. In choice test was placed only one leaf disk of each genotype per dish (9 cm in diameter) at the same infestation utilized in free-choice test. Evaluations were carried out in two stages, being first verified the attractiveness, by counting the number of insects on each disk at 1, 3, 5, 10, 15, 30, 60, 120, 240 minutes and 24 hours after releasing. In the second stage, leaf consumption was measured 24 hours after beginning the test. P. alata was the least attractive genotype to both new-hatched and 10-day old larvae in free-choice and no-choice tests. P. alata and P. foetida were the least consumed, to both larvae stages.
This aim of this study was to evaluate the effect of passion fruit genotypes on the attractiveness and feeding non-preference of D. juno juno larvae, through free-choice and no-choice tests. The experiments were carried out at FCAV/UNESP in Jaboticabal-SP, under lab conditions (T=26 ± 1°C, RH = 60 ± 10% and photophase = 14 hours), with Passiflora edulis, P. gibertii, P. alata, Sul Brasil, IAC-275, Flora FB 300, P. serrato-digitata, P. edulis f. flavicarpa, Maguary FB-100 and P. foetida genotypes. In free-choice test, Petri dishes with leaf disks (3.2 cm) of each genotype were used and distributed at equal distance from the center, and 5 new hatched larvae or one 10-day old larva per genotype were released. In choice test was placed only one leaf disk of each genotype per dish (9 cm in diameter) at the same infestation utilized in free-choice test. Evaluations were carried out in two stages, being first verified the attractiveness, by counting the number of insects on each disk at 1, 3, 5, 10, 15, 30, 60, 120, 240 minutes and 24 hours after releasing. In the second stage, leaf consumption was measured 24 hours after beginning the test. P. alata was the least attractive genotype to both new-hatched and 10-day old larvae in free-choice and no-choice tests. P. alata and P. foetida were the least consumed, to both larvae stages.
Descrição
Palavras-chave
Passiflora spp., Host plant resistance, juno silverspot, Passiflora spp., Resistência de plantas a insetos, Lagarta preta do maracujá
Como citar
Revista Brasileira de Fruticultura. Sociedade Brasileira de Fruticultura, v. 29, n. 2, p. 276-281, 2007.