Pesquisa Agropecuária Brasileira (2002) 37, 1219-1224

Maria Clarice Nunes and Beatriz Spalding Corrêa-Ferreira (2002)
Desempenho alimentar e sobrevivência de Euschistus heros parasitado por Hexacladia smithii em sementes de soja
[Feeding activity and survival of Euschistus heros parasitized by Hexacladia smithii]
Pesquisa Agropecuária Brasileira 37 (9), 1219-1224
Abstract: The influence of the parasitoid Hexacladia smithii Ashmead (Hymenoptera: Encyrtidae) on the feeding activity and on survival of the neotropical brown stink bug, Euschistus heros (Fabricius) (Hemiptera: Pentatomidae), was evaluated in the laboratory, at 10, 20, 30 and 40 days after parasitism. The feeding activity was evaluated through the number of stylet sheaths deposited on soybean seeds, Glycine max (L.) Merrill (Fabaceae), after feeding for 48 hours. The tests were conducted under controlled conditions of temperature (25±2°C), RH (65±10%) and photoperiod (14L:10D). At the beginning of the development of H. smithii the feeding activity of non-parasitized and parasitized bugs was similar; however, the number of stylet sheaths was two times greater in seeds fed upon by parasitized stink bugs than those fed upon by non-parasitized bugs, for males and females 30 days after parasitism. The survival of parasitized adults was smaller than that of non-parasitized adults, reaching 100% of the bugs died after 40 and 50 days of parasitism. The reduction in the survival of the stink bugs parasitized by H. smithii and the similar feeding activity among parasitized and non- parasitized bugs during almost the whole period of development of the parasitoids, put in relief the contribution of that parasitism to the reduction of the population of neotropical brown stink bug E. heros.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Beatriz S. Correa-Ferreira

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Euschistus heros
Hexacladia smithii (parasitoid)	Euschistus heros