Artigo
The importance of relative humidity for telenomus remus (Hymenoptera: Platygastridae) parasitism and development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) eggs
Registro en:
Annals Of The Entomological Society Of America. Cary: Oxford Univ Press Inc, v. 108, n. 1, p. 11-17, 2015.
0013-8746
10.1093/aesa/sau002
WOS:000349439700003
9277721969335158
Autor
Pomari-Fernandes, Aline
Queiroz, Ana Paula de
Bueno, Adeney de Freitas
Sanzovo, Allisson Wilson
Bortoli, Sergio Antonio de [UNESP]
Resumen
The rearing of Telenomus remus (Nixon 1937) has been limited due to the difficulty of its development in its natural host, the eggs of Spodoptera frugiperda (J.E. Smith). Environmental conditions can strongly affect egg's parasitoid rearing on factitious hosts; however, until now only the effects of temperature have been studied. The importance of relative humidity in T. remus parasitism is poorly understood; therefore, this study evaluated its parasitism on Corcyra cephalonica (Stainton, 1866) and S. frugiperda eggs under different humidity regimes. Lifetime parasitism and parasitism viability were higher on S. frugiperda eggs and did not differ among humidity regimes. However, these biological parameters were higher at 80% humidity than at both 40 and 60% humidity when T. remus was reared on C. cephalonica eggs. The sex ratio was always higher than 0.6 for all hosts and humidity regimes. Parental female longevity was only influenced by humidity when presented to C. cephalonica eggs: it was higher at 60 and 80% humidity. T. remus egg-to-adult period was longer in C. cephalonica eggs; however, no difference between humidity regimes was noted. In general, relative humidity affected T. remus development only when it was reared on C. cephalonica eggs. For this factitious host, 80% humidity was shown to be appropriate for egg parasitoid rearing due to its better biological performance. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Universidade Estadual Paulista, Departamento de Fitossanidade, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FAPESP: 2011/50338-2