Occurrence of rice black bug, Scotinophara coarctata (Fabricius) in Cotabato, Philippines
2002
Estoy, A.B. | Batay-an, E.H. | Torreno, P.S. | Tadle, F.P.J. (Philippine Rice Research Inst., North Cotabato (Philippines))
Rice black bug (RBB), Scotinophara coarctata Fabricius is one of the dreaded insect pest of rice causing serious crop losses in the Visayas and Mindanao [Philippines]. In Cotabato, RBB was first observed in 1996. Six year data on the light trap catches showed RBB population was unusually high in the first two years of infestation. RBB population was high during the dry season (January-June) than the wet season (July-December). Peak of light trap catches occurred during the full moon period. Adults collected had a 1:1 male to female ratio. Females caught in the light trap were still capable of laying eggs. Among the 155 females collected from the light trap, 58 (37%), 33 (21%), and 7 (5%) laid egg once, twice and three times while in captivity, respectively. However, viability of eggs laid decreased from 94% during the first egg laying to 34% in the third oviposition
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