Seasonal incidence of major insect pests of okra in the north eastern hill region of India
The present study on the seasonal incidence of major insect pests of okra was carried out at the experimental farm, ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib, Mizoram, India during 2009-2010. Okra cultivars tested in the present study were: Crystel Seed (Okra-151), Green Challenger, Julie (Nirmal-303), Nisha (Nirmal-101), Parbhani Kranti and OH-597. The results revealed that infestation varied significantly in different cultivars of okra. The okra cultivars Nisha (Nrimal-101) was found the lowest population against Nodostoma spp. (0.850) and Aphis gossypii (Glover) (1.282). Parbhani Kranti was recorded the lowest population against Mylabris pustulata (Thunb) (0.026); Julie (Nirmal-303) was found the lowest population against Dysdercus koenigii Fabr. (0.179) and Amrasca biguttula biguttula (Ishida) (0.010); okra cultivar Green Challenger was recorded the minimum per cent infestation (3.08 %) and the Crystel Seed (Okra-151) cultivar was noticed maximum per cent infestation (6.15 %) against Alcidodes affaber Auriv. Pooled analysis indicated that Nisha (Nirmal-101) was recorded relatively lowest insects population (1.091), while Crystel Seed (Okra-151) was observed the maximum insects population (2.163). A. biguttula biguttula was noticed relatively lowest population (0.037) among all okra cultivars screened. Whereas, A. gossypii was recorded the maximum population (3.225) among all okra cultivars screened.
Okra cultivars, key insect pests;infestation; seasonal incidence
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