Effect of Various Treatments Against Major Insect Pests of Field Pea, Pisum sativum (L.)*

Investigations were carried out to evaluate various treatments consisting of date of sowing, cropping system and protection treatments in various combinations against major insect pests of field pea. The pre-sowing application of carbofuran @ 1 kg a.i./ha followed by seed treatment with monocrotophos @ 0.2 kg a.i./ha in early sown crop gave effective control of stem fly damage. Spray of NSKE 5% just after germination did not prove effective against stem fly attack. No interaction effect of date of sowing, pre-sowing application of insecticides and intercropping on the thrips and pod borer damage could be ascertained. However, the late sown crop was almost free from stem fly attack but had high leaf miner attack. The highest mean equivalent grain yield of 965.33 kg/ha was obtained with carbofuran in early sown pea intercropped with mustard followed byt 960.14 kg/ha with monocrotophos in late sown intercrop. However, maximum benefit:cost ratio of 12.45:1 was obtained with seed treatment through monocrotophos in early sown crop.