EFFICACY OF SOME ACARICIDES AGAINST ERIOPHYID MITE, EFFICACY OF SOME ACARICIDES AGAINST ERIOPHYID MITE, EFFICACY OF SOME ACARICIDES AGAINST ERIOPHYID MITE, ACERIA SP. (ACARINA: ERIOPHYIDAE) IN NORTH WEST HIMALAYAS

Abstract

Field experiments were conducted to evaluate efficacy of four acaricides namely dicofol 18.5EC (0.5 ml/L), propargite 57EC (0.2 ml/L), fenpyroximate 5EC (2.0 ml/L) and hexythiazox 5.45EC (1.8 ml/L) against eriophyid mite, Aceria sp. (Acarina: Eriophyidae) infesting seabuckthorn (Hippophae L.) in North West Himalayas. The results revealed that two sprays of these acaricides done at ten days interval reduced mite population by 98.8- 99.4, 99.5-99.6, 96.1-99.3 and 84.1-99.5 per cent over pre-treatment as observed 10 days after second spray (DAS2) in two years respectively. Whereas, mite population in control plants increased by 233.5-246.8 per cent over pre-treatment during the same time interval. Likewise, reductions in blister count on seabuckthorn leaves in two years varied from 63.2-78.6, 66.7-81.0, 68.8-70.0 and 56.3-70.0 per cent over pre-treatment as observed at 10DAS2 in case of dicofol 18.5EC (0.5 ml/L), propargite 57EC (0.2 ml/L), fenpyroximate 5EC (2.0 ml/L) and hexythiazox 5.45EC (1.8 ml/L) sprayed plants, respectively. While, leaves on the control plants registered 100- 105.9 per cent increase in blister count during this same time. From present studies, it was concluded that the evaluated acaricides effectively checked the population build-up of eriophyid mite, prevented blister development and could be used for management of eriophyid menace on seabuckthorn.