Caracterização biológico-comportamental de Podisus nigrispinus (Dallas, 1851) predando Plutella xylostella (L., 1758)
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Data
2009-10-02
Autores
Vacari, Alessandra Marieli [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste trabalho foi efetuar a caracterização biológicocomportamental de Podisus nigrispinus alimentado com lagartas e pupas de Plutella xylostella, com o intuito de aumentar os conhecimentos dessa interação predador-presa para que, no futuro, se possa estabelecer um programa de controle biológico para a traça-das-crucíferas. Os experimentos foram conduzidos em sala climatizada a 25±1°C, umidade relativa de 70±10% e fotofase de 12 horas. Foram verificados aspectos biológicos de P. nigrispinus, elaboradas tabelas de vida de fertilidade e de esperança, verificada a preferência de alimentação entre as diferentes fases de desenvolvimento da presa (larvas ou pupas) e o comportamento de predação em função de diferentes densidades de presas (larvas e pupas). Os dados biológicos obtidos indicaram que larvas e pupas de P. xylostella foram presas adequadas para o desenvolvimento dos predadores. Larvas e pupas de P. xylostella proporcionaram bom desempenho reprodutivo e alta longevidade de fêmeas do predador. Os predadores preferiram consumir larvas a pupas de P. xylostella. P. nigrispinus apresentou resposta funcional do tipo II quando consumiu larvas e pupas da traça-das-crucíferas e apresentou maior consumo de presas principalmente nas maiores densidades. Essas informações indicam que P. nigrispinus possui potencial como agente de controle de P. xylostella e que novos estudos podem ser realizados em casa de vegetação e em campo para que, no futuro, esse inimigo natural possa ser utilizado em programas de controle biológico em culturas de brassicáceas
The objective of this work was to study the biological behavioral characterization of Podisus nigrispinus feeding on larvae and pupae of Plutella xylostella, aiming to increasing the knowledge of predator-prey relationship to establish a future biological control program of diamondback moth. The experiments were led in acclimatized room to 25±1°C, RH 70±10% and photophase 12h. The biological aspects were verified, fertility and expectancy life table were elaborated, the preference feeding between the different phases in development of the prey (larvae or pupae) was determined, and verified the consumption behavior in function of different densities of preys (larvae and pupae) was studied. The biological data indicated that larvae and pupae of P. xylostella were appropriate preys to predators development. Larvae and pupae provided good reproductive performance and high longevity of females of the predator P. nigrispinus. The predators preferred to consume larvae than pupae of P. xylostella. P. nigrispinus presented functional response of the type II when it consumed larvae and pupae of diamondback moth and it presented larger consumption of preys mainly in the largest densities. All those information indicate that P. nigrispinus have potential as control agent for P. xylostella and that new studies can be accomplished in greenhouse and in field. For that, in the future, this natural enemy can be used in biological control programs in brassica’s crops
The objective of this work was to study the biological behavioral characterization of Podisus nigrispinus feeding on larvae and pupae of Plutella xylostella, aiming to increasing the knowledge of predator-prey relationship to establish a future biological control program of diamondback moth. The experiments were led in acclimatized room to 25±1°C, RH 70±10% and photophase 12h. The biological aspects were verified, fertility and expectancy life table were elaborated, the preference feeding between the different phases in development of the prey (larvae or pupae) was determined, and verified the consumption behavior in function of different densities of preys (larvae and pupae) was studied. The biological data indicated that larvae and pupae of P. xylostella were appropriate preys to predators development. Larvae and pupae provided good reproductive performance and high longevity of females of the predator P. nigrispinus. The predators preferred to consume larvae than pupae of P. xylostella. P. nigrispinus presented functional response of the type II when it consumed larvae and pupae of diamondback moth and it presented larger consumption of preys mainly in the largest densities. All those information indicate that P. nigrispinus have potential as control agent for P. xylostella and that new studies can be accomplished in greenhouse and in field. For that, in the future, this natural enemy can be used in biological control programs in brassica’s crops
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Palavras-chave
Pragas - Controle biologico, Podisus, Biologia de insetos, Percevejo predador, Asopinae, Biology of insects, Predatory stinkbug
Como citar
VACARI, Alessandra Marieli. Caracterização biológico-comportamental de Podisus nigrispinus (Dallas, 1851) predando Plutella xylostella (L., 1758). 2009. xi, 102 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2009.