Neotropical Entomology (2002) 31, 165-167

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Déborah L.A. Coracini and Richard I. Samuels (2002)
Natural enemies of the chinch bug, Blissus antillus Leonard (Hemiptera: Lygaeidae: Blissinae), pasture pest in Rio de Janeiro State, Brazil
Neotropical Entomology 31 (1), 165-167
Abstract: This study aimed to identify natural enemies of the chinch bug, Blissus antillus Leonard, which attacks Tanner grass (Brachiaria arrecta) and Tangola (hybrid of B. arrecta and B. angola), in poorly drained pastureland in the northern region of Rio de Janeiro State. Immature stages of a parasitic mite, identified as Leptus sp. (Parasitengona: Erythraeidae), were commonly found attacking nymphs and adult chinch bugs in all sampled areas of Rio de Janeiro State. An egg parasitoid, Eumicrosoma sp. (Hymenoptera: Scelionidae), was observed on only two occasions attacking eggs which had been collected on plant stems in the field. These natural enemies are possible candidates for biological control programs. Despite extensive sampling, B. antillus was not observed to be infected by entomopathogenic fungi.

Esse estudo teve o objetivo de identificar inimigos naturais do percevejo das gramíneas, Blissus antillus Leonard, que ataca "Tanner grass" (Brachiaria arrecta) e capim Tangola (híbrido de B. arrecta e B. angola) em pastagens mal drenadas da região Norte e Noroeste Fluminense-RJ. Ninfas de um ácaro parasita, identificado como Leptus sp. (Parasitengona: Erythraeidae) foram encontradas regulamente atacando ninfas e adultos do B. antillus em todas as regiões onde o percevejo foi amostrado no estado de Rio de Janeiro. O parasitóide de ovos, Eumicrosoma sp. (Hymenoptera: Scelionidae), foi observado somente duas vezes atacando ovos de B. antillus que têm sido encontrados nas plantas trazidas do campo. Esses inimigos naturais poderiam ser candidatos para utilização em programas de controle biológico. Apesar de uma procura extensa, B. antillus nunca foi encontrado infectado com fungos entomopatogênicos.
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Blissus antillus Brazil (south)
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