THE INFLUENCE OF DIFFERENT METHODS OF TOMATO PLANT TREATMENT BY ETHREL ON THE RIPENING AND LEVEL OF ETEPHON RESIDUE IN TOMATO FRUIT
- spraying leaves only;
- spraying fruits only;
Ripening of fruits was hastened by spraying of leaves or fruits. Leaves treatment increased the number of ripe fruits from each cluster and these were harvested earlier. In the case of leaves treatment, the etephon content in the ripe fruits increased slowly up to 12 days after spraying, then increased rapidly in next 2 days, and then sharp decline was observed. Residues of etephon in tomato fruits resulting from leaves treatment were 1.7 times higher, than those from fruit. spraying, and about 10 times higher than in the case of drenching. Etephon residues reached maximum level 4 days earlier when fruits were sprayed, as compared with leaves spraying.