Consequence of Spodoptera litura Fabricius (Lepidoptera: Noctuidae) Morphometrics Reared on Different Cotton Varieties

Morphometric characteristics of cotton armyworm Spodoptera litura were studied on cotton varieties CB9, CB10 and SR05. The morphometric parameters of the insect showed that the cotton variety SR05 revealed significantly the highest diameter of egg mass (7.4±0.4 mm). The cotton varieties showed significant effect on the length of different larval instars but the breadth of 3 rd and 4 th instar were statistically different. The studied cotton varieties as food sources did not affect pupal length and also the length and breadth of adults, but pupal breadth showed significant variation. The highest breadth (6.5±0.6 mm) of pupa was found when the insects were reared on SR05 variety. DOI: 10.3126/on.v8i1.4318