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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Importance of Relative Humidity for Telenomus remus (Hymenoptera: Platygastridae) Parasitism and Development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) Eggs

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Author(s):
Pomari-Fernandes, Aline [1] ; De Queiroz, Ana Paula [2] ; Bueno, Adeney De Freitas [3] ; Sanzovo, Allisson Wilson [4] ; De Bortoli, Sergio Antonio [5]
Total Authors: 5
Affiliation:
[1] Univ Fed Fronteira Sul, BR-85301970 Laranjeiras Do Sul, Parana - Brazil
[2] Inst Agron Parana, BR-86047902 Londrina, Parana - Brazil
[3] Embrapa Soja, Empresa Brasileira Pesquisa Agr, BR-86001970 Londrina, Parana - Brazil
[4] Univ Estadual Norte Parana, BR-86300000 Cornelio Procopio, Parana - Brazil
[5] Univ Estadual Paulista, Fac Ciencias Agr Jaboticabal, BR-14884900 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Annals of the Entomological Society of America; v. 108, n. 1, p. 11-17, JAN 2015.
Web of Science Citations: 5
Abstract

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. (AU)