Abstract
Field lifetables were prepared for determining mortality factors of leaf miner Aproaerema modicella Deventer on sole soybean and soybean intercropped with pigeonpea during kharif 2015. It was observed that the A. modicella completed three regular overlapping generations on sole soybean and as well on soybean intercropped with pigeonpea. Lifetable of field collected life stages revealed that late instar larval and pupal stages were the most vulnerable ones for mortality due to unknown reasons (predation and adverse climatic factors). The natural enemies viz., Apanteles sp. and Goniozus sp., also contributed some degree of mortality in larvae. Maximum larval parasitisation was observed with intercropped soybean. The negative values of trend index (<1) during the second and third generations showed that the mortality factors were effective in causing decline. The generation survival rate on sole soybean was 0.65, 0.70 and 0.63 which got reduced to 0.53, 0.69 and 0.62 on intercropped soybean, in the 1st, 2nd and 3rd generation, respectively. Thus, soybean intercropping with pigeonpea exhibited positive significant impact on key mortality factors of A. modicella.
Published Version
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