Seasonal and tea varietal effect on the biology of Oligonychus coffeae Nietner

Abstract

The clonal effect of three Tocklai released tea clones TV1, TV6 and TV10 on the biology of O. coffeae were studied during the seasons April-May, June-July and Aug-Sep. The life cycle of an adult female mite on an average took the longest duration to develop in TV6 (14.36 days), intermediate in TV10 (13.47 days) and the shortest durations were observed in TV1 (12.39 days). The seasonal effect on the biology of O. coffeae also showed profound effect on the biology of O. coffeae and during June-July a female mite on an average took the least time to develop (10.97 days).