B.G. PRAJAPATI, S.B. GONDALIYA AND A.U. AMIN

Evaluation of different insecticides and botanicals against the seed wasp, Systole albipennis Walker infesting fennel was undertaken during khanf 2011-12 to 2013-14 at Seed Spices Research Station, Jagudan in a randomized block design with nine treatments replicated thrice. Damage due to seed wasp was lowest (5.77%) in thiamethoxam 25WG (0.0084%) at three and seven days after each of the two sprays. The plots sprayed with acetamiprid 20SP (0.004%) had registered 10.30 and 10.87 per cent seed wasp damage at three and seven days after second spray, respectively. The seed wasp damage at harvest was also recorded the least (7.78%) in the treatment of thiamethoxam 25WG (0.0084%) and it was followed by acetamiprid 20SP (0.004%) with 11.19 per cent damage. The plots sprayed with thiamethoxam (0.0084%) recorded the highest seed yield of fennel (2260kg/ha) followed by acetamiprid (0.004%) with 2054kg/ha; however, acetamiprid (0.004%) treated plots gave maximum benefit cost ratio (PCBR= 1:33.10).