Vol. 11, Issue 9 (2022)

Author(s):
GP Harke, VB Berad and PS Neharkar

Abstract:
The investigation on efficacy of insecticides against safflower aphid (Uroleucon compositae) was conducted on research farm of Department of Agricultural Entomology, College of agriculture, V.N.M.K.V. Parbhani. Need based two foliar application was given where all treatments rendered significant suppression of aphids as compared to untreated control. Aphid population was uniform before application of treatments. Among all the treatments at one, five, seven, fourteen day after each spray, Spinetoram 11.7% SC appeared to have better control over aphids as it registered significantly least (3.43,2.21, aphids/5cm apical twig) population in both first and second spray followed by Acephate 75% SP (4.00 and 2.34 aphids/5cm apical twig). Other treatments on order of their merit was thiamethoxam 25% WG (4.15 and 3.12 aphids/5cm apical twig), Acetamiprid 20% SP (4.33 and 3.29 aphids/5cm apical twig), Imidacloprid 17.8% SL (4.56 and 3.37 aphids/5cm apical twig), and Clothianidin 50% WDG (4.83 and 3.50 aphids/5cm apical twig). However all these treatments found at par with each other. The highest aphid population was observed in untreated plots (10.99 and 11.86 aphids/5cm apical twig). The highest yield of safflower seed obtained from plots treated with spinetoram 11.7% SC (14.50q/ha) as compared to other treatments. Thiamethoxam 25% WG and imidacloprid 17.8% SL treatments showed higher net profit with a cost benefit ratio of (1:71.50) and (1:56.09).