Efficiency of Different Chemicals on Canola Strain Rainbow ( Brassica napus L.) For Aphids Control

摘要

Field studies were carried out to evaluate the effects of different insecticides as foliar application for the control of aphids population on canola ( Brassica napus L.) crop. The insecticides Endosulfan (Thiodan 35EC), Fenpropathrin (Sanitol 20EC) and Dimethoate (Systoate 40EC) were sprayed with knapsack sprayer at the normal recommended doses and a check plot was also maintained for comparison. The efficacy of these insecticides was assessed by counting the aphids mortality and their influences on grain yield on treated plots. Studies revealed that all the tested insecticides were superior and most promising for aphids management and provided better crop yield as compared to untreated plot (140 aphids per plant and 1707 g yield per 8m²). Endosulfan was proved highly toxic to control aphids population (4.66 aphids plant^-1) and maximum yield was obtained (2322.0 g/8m²) followed by Fenpropathrin and Dimethoate (6.83, 13.17 aphids plant^-1 and 2107.0, 1948.0 g/8m² grain yield , respectively).