Evaluation of insecticides and Bacillus thuringiensis against tomato pin worm Tuta absoluta (Meyrick).
Tomato pin worm Tuta absoluta (Meyrick) is one of the most destructive pests causing damage to tomato. This field study undertaken in a randomized block design evaluated seven treatments during kharif, 2019 at farmers field in Theni district. The insecticides evaluated include- chlorantraniliprole 18.5SC 0.3 ml/l, spinosad 45SC 0.3 ml/l, indoxacarb 14.5SC 1 ml/l, Bt var. kurstaki HD1 2g/l, Bt var. kurstaki HD73 2g/l and Dipel at 2 ml/l. Chlorantraniliprole was observed to be the best with 81.48% reduction in incidence. In comparison, 80.58 and 79.10% reduction were observed with B. thuringiensis var. kurstaki HD1 and spinosad, respectively; and B. thuringiensis var. kurstaki HD73 was the least effective.