Tamil Nadu Agrl. University, Coimbatore
An investigation was carried out to study the persistence and to evaluate the waiting periods when 0.7 kg ai/ha phosalone, 0.5 ka ai/ha quinalphos, 0.5 kg ai/ha methyl parathion and 1.0 kg ai/ha fenitrothion were sprayed on tomato fruits. The half life and total values were worked out and based on these data, waiting period of 4.75 days for methyl parathion, 3.89 days for phosalone, 2.23 days for fenitrothion and 2.01 days for quinalphos have been suggested for safe consumption.
