Selected insecticides viz. Flubendiamide 39.35% SC, Indoxacarb 14.5% SC, Lambda cyhalothrin 5% EC, Novaluron 10% EC, Quinalphos 25% EC, Spirotetramat 120% SC+ Imidacloprid 120% SC Chlorantraniliprole 18.5% SC were evaluated for their effectiveness against tomato fruit borer by conducting field trial at PGI, MPKV, Rahuri during the year 2019. Three sprays of each insecticide were applied at the occurrence of the pest. The result revealed that lowest larval population (1.14 larvae/plant) of H. armigera was recorded in treatment of chlorantraniliprole 18.5% SC. Flubendiamide 39.35% SC (1.51 larvae/plant) was the next promising treatment followed by indoxacarb 14.5% SC exhibiting 1.70 larvae/plant. Treatments viz. spirotetramat 120% SC + imidacloprid 120% SC, lambda cyhalothrin 5% EC, quinalphos 25% EC found to be moderately effective against H. armigera and recorded larval population ranging from 1.99 to 2.27 larvae/plant H. armigera. Novaluron 10% EC was least effective, with maximum (2.42 larvae/plant) population of H. armigera.

Studies on the dissipation pattern of spirotetramat and imidacloprid in/on tomato fruits were undertaken by following three foliar applications at recommended and double the recommended doses of combination product spirotetramat 120 SC + imidacloprid 120 SC @ (75 and 150 g a.i./ha) at fruiting stage. Residues of spirotetramat and imidacloprid dissipated with half-life of 1.93, 1.37 and 1.40, 1.92 days, at both the doses respectively. The residues reached below quantification limit (BQL) on 5th day in spirotetramat and 7 th day in imidacloprid at the recommended dose. Considering this, Pre-harvest interval (PHI) of 7 days can be suggested for combination product with reduced risk of insecticide residues in tomato.

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A field experiment on Influence of plant density of marigold on larval population of H. armigera in chickpea (Cicer arientinum L.) was conducted at Entomology Research Farm, PGI, MPKV, Rahuri during Rabi 2019-20 to evaluate the different planting combination of chickpea (Digvijay) with marigold in a Randomized block design (RBD) with 4 replication. All treatment combination record lowest larval population and pod damage as compare to sole chickpea crop. The lowest larval population was observed in T2 Chickpea +Marigold 3 (6:2) i.e. 2.06 larvae per meter row length. In Trap cropping with marigold maximum yield (22.54 q/ha) of chickpea was obtained from Chickpea + Marigold, 6:2 ratio. The average pod damage recorded ranged between 11.18 to 17.03%.

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