Phytophagy of the predator Podisus nigrispinus em diferentes brassicaceas

The purpose of this study was to investigate the development and reproduction of the zoophytophagous predator Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) fed kale, broccoli and cabbage affects its. Nymphs and adults of this predator were fed on larvae of Plutella xylostella (L.) (Lepido...

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Published inBrazilian journal of biology Vol. 77; no. 4; p. 703
Main Authors Grigolli, J.F.J, Grigolli, M.M. Kubota, Ramalho, D.G, Ma, Vacari, A.M, De Bortoli, S.A
Format Journal Article
LanguageEnglish
Published Association of the Brazilian Journal of Biology 01.11.2017
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Summary:The purpose of this study was to investigate the development and reproduction of the zoophytophagous predator Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) fed kale, broccoli and cabbage affects its. Nymphs and adults of this predator were fed on larvae of Plutella xylostella (L.) (Lepidoptera: Plutellidae) as prey with kale, cabbage, or broccoli. In the nymph period, the duration and prey consumption were similar with all the Brassicacea cultivar. However, nymph viability was higher for predators with broccoli leaves. The mean weight of 5th-instar nymphs, newly emerged females and the sex ratio were similar among the Brassicacea cultivars, while newly emerged males were heavier with kale and broccoli leaves. The supply of broccoli leaves resulted in greater oviposition, higher number of eggs per egg mass and longer longevity of P. nigrispinus males and females. Furthermore, the consumption of P. xylostella larvae by adult predators was higher with these cultivars. The net reproductive rate ([R.sub.0]) and mean generation time (T) were highest for predators with prey and broccoli leaves. The reproductive parameters of P nigrispinus were enhanced when fed on P. xylostella larvae with and broccoli leaves, which can be an alternative diet in laboratory rearing of this predator. Keywords: biological control, mass rearing, predatory stinkbug, zoophytophagous. O objetivo deste estudo foi verificar o desenvolvimento e reproducao do zoofitofago Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) em couve, brocolis e repolho. Ninfas e adultos deste predador foram alimentados com lagartas de Plutella xylostella (L.) (Lepidoptera: Plutellidae) como presa e receberam folhas de couve, repolho ou brocolis. Durante o periodo ninfal, a duracao do periodo e o consumo de presas foram semelhantes com as diferentes cultivares de brassicacea. Porem, a viabilidade ninfal foi maior para predadores com folhas de brocolis. O peso de ninfas de quinto instar e de femeas recem-emergidas e a razao sexual de P. nigrispinus foram semelhantes entre as cultivares de brassicaceas, enquanto que o peso de machos recem-emergidos foi maior com folhas de couve e brocolis. Folhas de brocolis proporcionaram maiores numero de oviposicoes, ovos por postura e longevidade de machos e femeas de P. nigrispinus. Alem disso, o consumo de lagartas de P. xylostella por adultos desse predador fora maiores com esta cultivar. A taxa liquida de reproducao ([R.sub.0]) e o tempo medio de geracao (T) foram maiores para predadores com presa e folhas de brocolis. Podisus nigrispinus alimentados com lagartas de P. xylostella e folhas de brocolis apresentaram melhores parametros reprodutivos, podendo ser uma alternativa para a criacao deste predador em laboratorio. Palavras-chave: controle biologico, criacao massal, percevejo predador, zoofitofago.
ISSN:1519-6984
1678-4375
DOI:10.1590/1519-6984.16615