Population Fluctuations Of Sucking Insect Pests On Canola (Brassica Napus L.) In Peshawar

Abstract

The study taken at The University of Agriculture Peshawar in winter 2022 surveyed the density of sucking insect pests on canola crops. Aphids, whitefly, jassids, and thrips populations and their natural enemies were obtained from the samples collected.

The results of the survey showed that the highest infestation of aphids occurred during the 2nd week of November at (3.1 aphids/leaf), while whitefly (2.8 aphids/leaf), jassids (2.7 aphids/leaf), thrips (2.3 aphids/leaf) were next highest in population density. Among the four sucking insect pests delay among them, aphids had a higher population density than thrips with the lowest.

The mean number of predators showed some significant differences between the first two observations, with the population densities for ladybird beetles, green lacewing, and syrphid flies surveyed at the study area..