Department of Agricultural Chemistry & Soil Science, University of Udaipur, Udaipur, Rajasthan
*Present address: Department of Agricultural Chemistry and Soil Science, College of Agriculture. Parbhani, Maharashtra
DDT, endrin and lindane significantly reduced the dry matter yield of wheat whereas aldrin increased it. Growth of maize increased by 20 ppm of aldrin and 20 and 30 ppm of endrin but decreased by 30 ppm of aldrin. T tough 10 ppm of DDT and lindane stimulated the growth of maize, 20 and 30 ppm of lindane were toxic. DDT at 10 ppm concentration increased N absorption by wheat and maize. 10 and 20 ppm aldrin concentrations stimulated N uptake by both the crops but 30 ppm inhibited it in maize only. 30 ppm endrin in wheat and 10 and 20 ppm treatments in maize increased N uptake. Though increased by 10 ppm, N uptake was decreased by 20 and 30 ppm of lindane in both the crops. All treatments of insecticides reduced P uptake by maize and the same was true for DDT and endrin in wheal. However, 10 and 20 ppm aldrin stimulated P absorption by wheat but 20 and 30 ppm lindane decreased it. K uptake by maize was increased by all treatments except 20 and 30 ppm lindane and 30 ppm aldrin whereby it was decreased. In wheat, all levels of lindane and 20 and 30 ppm of endrin reduced K uptake but 10 ppm aldrin increased the uptake.
Insecticides, crop growth, uptake of N, P and K
