Impact of acetamiprid 20% SP against natural enemy populations (Coccinella spp.) at different doses and evaluation for phytotoxicity on cabbage crop

Srivastava R. M.; Shivashankara; Phartiyal Tanuja; Rukesh Pramod K. N.

Volume : V, Issue : X, October - 2016

Impact of acetamiprid 20% SP against natural enemy populations (Coccinella spp.) at different doses and evaluation for phytotoxicity on cabbage crop

Srivastava R. M. , Shivashankara, Phartiyal Tanuja, Rukesh Pramod K. N.

Abstract :

The present experiment was conducted to check the Impact of acetamiprid 20% SP against natural enemy populations (Coccinella spp. and Spiders) at different doses and evaluation for phytotoxicity on cabbage crop at Vegetable Research Centre of G.B. Pant University of Agriculture and Technology Pantnagar, U.S. Nagar, Uttarakhand during April 2014–15. The data of first spray indicated that, the per cent reduction of aphid in the treatment T4– acetamiprid 20%SP @150g/ha has shown best control (83.05%) followed by T3– acetamiprid 20%SP @100g/ha (81.04%) followed by T2– acetamiprid 20%SP @75g/ha (77.97%), T5– Dhanpreet 20%SP (77.91%) and least control was found in T1– acetamiprid 20%SP @50g/ha. But the results of second spray are slightly different and almost similar results were found in T4 (79.87%), T3 (79.71%), T5 (79.28%), T2 (78.28%) because of residual effect of first spray and least control was found in T1 (64.87%). While the �per cent increase in yield over control� was in treatments T4 (178.50 q/ha), followed by T3 (176.75 q/ha) followed by T2 and T5 (173.25 and 172.75 q/ha) and least yield was observed in T1 (154.25%). Even though highest control was observed in treatment T4 but results were satisfactory with T2 and T5 treatments and can be recommended as to lower the impact on natural enemies.