Effect of Host Plants and Site of Application on the Infectivity or Nuclear Polyhedrosis Virus to Spodoptera litura Larvae


The effect of eight common host plants on the mortality and incubation period in Spodoptera litura (F.) larvae to a constant dose of nuclear polyhedrosis virus (NPV) was studied. Maximum mortalitles were obtained on tobacco (96.67%). cauliflower (96.67%) and cabbage (93.33%) with minimum incuba1ion period (7.67 to 8.67 days). Application of NPV to both lower and upper leaf surfaces of tobacco and cotton caused maximum mortality. Application to lower surface alone caused higher mortality than that applied to upper surface only.


Spodoptera litura NPV, Infectivity, Host Plants, Site of Application.

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