Diazinon and Dursban residue in Soil at Different Applied Doses and Response of Cabbage at Different growth stages

An experiment was conducted at Experimental Field of BCSIR, Dhaka during winter season 2008 to assess the responses and residual effects of different doses of applied Diazinon and Dursban on cabbage cultivation at different growth stages. During experiment five treatments with three replications of two pesticides were applied in the experimental field. The plot size was 2m X 2m and total plots were 45 for the above mentioned treatments. According to experimental procedure, at early growth stage after application of two pesticides, the growth of Cabbage was enhanced but at middle and mature growth stages were slowed down the growth. At varying growth stages after spaying of both pesticides, nutrient uptake were increased and growth was simply enhanced, at that time the concentration of different doses of Diazinon ranges from 2.159 mg l- to 9.284 mg l- (Diazinon doses; 1.50 L/ha, 5.00 L/ha, 8.00 L/ha and 12.00 L/ha); in second stage it ranges 2.823 mg l- to 12.140 mg l- and at mature stage the concentration ranges from 2.936 mg l- to 12.626 mg l- at the respective applied doses, which is statistically significant at 0.001 level (t ³ 12.941).