Anais da Sociedade Entomológica do Brasil (2000) 29, 295-302
D.J.P. Pacheco and B.S. Correa-Ferreira (2000)
Parasitismo de Telenomus podisi Ashmead (Hymenoptera: Scelionidae) em Populações de Percevejos Pragas da Soja
[Parasitism by Telenomus podisi Ashmead (Hymenoptera: Scelionidae) on soyabean stink bug populations]
Anais da Sociedade Entomológica do Brasil 29 (2), 295-302
Abstract: The parasitism of Telenomus podisi Ashmead, on some pentatomid pests of soybean [Glycine max (L.) Merrill] was studied. The tests were conducted during soybean croping season (1996/97) in two areas, cultivated with BR-48 and BR-37 (area 1 and 2, respectively), at Embrapa Soja, in Londrina, PR. Euschistus heros (Fabricius), Piezodorus guildinii (Westwood) and Nezara viridula (Linnaeus) were the most abundant species on this crop. The highest populational density occurred at the end of the crop cycle (5.3, 3.3, 3.6 - area 1 and 5.2, 14.5, 7.5 stink bugs/2 m - area 2, respectively). On both areas, the parasitoid T. podisi had better interaction, with the population of E. heros, with increasing parasitism in the area 1, reaching 100% in the end of the cycle, and showing above 80% during all sample period on area 2. The parasitism obtained on eggs of E. heros, in cages with isolate population of this insect, was statistically similar, when compared with eggs of the same pentatomid in cages with mixed population containing the three species (31.7 ± 7.51 and 20.1 ± 6.67, respectively). P. guildinii and N. viridula, however, had consistently more parasitism in cages with mixed population.
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(original language: Portuguese)
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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:
surveys/distribution/isolation
