Sher-e-Kashmir University of Agricultural Sciences and Technology Centre, R.S. Pura, Jammu
1. A part of Ph. D. thesis of the senior author submitted to the Himachal Pradesh Krishi Vishva Vidyalaya.
In 1979.80 and 1980.81, the cabbage aphid, Brevicoryne brassicae (L.) in Himachal Pradesh at Solan reached peak numbers on the cauliflower seed crop at 688 degree-days (SOC base) after first detection on the crop. Heavy rainfall, wind and frost beside other biotic agents during February. March 1981 drastically reduced the aphid population.
