Abstract
The effect of planting dates on the yield and control of major insect pests of soybean were studied in the 1995 and 1996 planting seasons at Umudike, Southeastern Nigeria. The incidence of the defoliators, Monolepta duplicata Sahl and Ootheca mutabilis Linnaeus in all the planting dates were earlier (2 weeks after planting, 2WAP) up to 8WAP. However, the stink bugs, Nezara viridula Linnaeus and Aspavia armigera Fabricius were found infesting soybean pods from 8WAP to 14 WAP. The peak populations of the defoliators and stinkbugs were recorded at 4WAP and 10WAP, respectively. The crop planted on August 20 had a significantly (P [IJARD Vol.3 2002: 121-126]
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