Seasonal incidence of aphid, myzus persicae (Sulzer) on cumin, cuminum cyminum linn.

Abstract

Studies on seasonal incidence of aphid, Myzus persicae (Sulzer) on cumin was conducted at Instructional farm, College of Agriculture, Bikaner (Rajasthan) during rabi, 2016-17. Incidence of aphid started in the last week of December (52th standard meteorological week) and reached to its peak in fourth week of January (4th standard meteorological week) and gradually declined thereafter. Significant negative correlation was observed between infestation of aphid with maximum temperature whereas, morning relative humidity showed positive significant correlation. Aphid was significant positive correlation with predator, Coccinella septempunctata.