Effect of chemical.gametocides on pollen steriuty and pod setiing in groundnut

Of the four chemicals tested on four genotypes of groundnut, IAA and Ethrel induced maximum polled sterility than GA3 and 2,4-D. Maximum pollen sterility was recorded in TG 26 (56.2%) and JL 24 (50.1%) with IAA 100 ppm. The percent pollen sterility over genotypes recorded ranged from 1.6 to 15.1% for 2,4-D, 3.1 to 31.6% for Ethrel, 1.1 to 13.5% for GA3, and 9.7 to 56.2% for IAA. Among the genotypes tested, JL 24 and TG 26 were more sensitive to all the chemicals in inducing pollen sterility.