Journal ID : AMA-02-08-2022-11582
[This article belongs to Volume - 53, Issue - 08]
Total View : 351

Title : Succession of Pea Insect Pests and their Natural Enemies in Rainfed Sub Tropics of Jammu and Kashmir region of N-W Himalayas

Abstract :

Major insect pests and their natural enemies, prevalent in field pea crop of Jammu and Kashmir sub tropical Kandi areas were recorded. This shall help in targeting the major insect pests at the right time/stage for applying appropriate protection measures. Experiments were conducted to record the pest and their natural enemies’ population fluctuation, at different phenophases of the crop. Eleven different pea varieties were sown in randomized block design, replicated thrice in a plot size of 3 x 4 m2, maintaining a plant to plant distance of 5-6 cm and row to row distance of 30 cm. Leaf miner and aphids were found to be the two major insect pests of pea in this region and the predator ladybird beetle, and parasitoid quite effectively kept the aphid population under check. Pea leaf miner infestation started with the 45 days old crop and its infestation varied among the different varieties. Lowest leaf miner infestation was recorded in US-10, which was at par with the variety Sweet pearl and MGS-10. However, significantly highest leaf miner infestation was in popular varieties Green Valley, Rachna and Prakash. Significantly highest per cent parasitization was recorded in GS-10 variety which was at par with KIWI-101, Prakash and Green Valley. However, per cent parasitization by aphid parasitoid ranged from 44.50 - 56.20 per cent during Rabi 2016-17 and 46.50 - 52.40 per cent during Rabi 2017-18 irrespective of the different varieties. Significantly superior predator counts were also observed in US-10, Varun Dhara, Rachna, DS-10 and MGS-10. Management strategies for leaf miner should preferably be started, when the crop is 45 - 50 days old as irrespective of the varieties, the leaf miner population started appearing after 35 - 40 days of sowing and reached its peak during 45 - 50 DAS. Fifty per cent of the aphid population is kept under check by its predator and parasitoid. Management strategies should be therefore modified accordingly, so as to cause least harm to the natural enemy population.

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