EVALUATION OF SOME NON-CHEMICAL AND CHEMICAL TACTICS FOR MANAGING LITCHI FRUIT BORER

Abstract

Litchi damage is rated highly by the litchi fruit borer (LFB), causing substantial financial loss to the farmers which was minor a few years ago. This study aimed at evaluating 10 tactics for the management of LFB. Efficacies of the tactics were observed for two consecutive years, with the implication of treatments 15 days after the fruit set. The tactics performed better compared to the control. The hundred percent reduction of fruit infestations over control was with white waxed paper bag (T3), followed by Cartap 50 SP (T7: 96.10%), Sunmectin 1.8 EC (T8: 94.86%) and neem leaf extract with mosquito net (T2: 92.13%). The maximum number of healthy fruit was obtained from the treated tree of T3 (100%), followed by T7 (98%), T8 (97.36%) and T2 (95.96%). Among the treatments, the highest benefit-cost ratio (BCR) was 11.40:1 with neem leaf extract (T4). Then second in neem oil (T5: 9.99:1) followed by T3 (8.72:1), karanja oil (T6: 7.97:1) and T8 (7.49:1). It was evident that application of neem leaf extract 15 days after fruit formation appeared as the most cost-effective tactics followed by white waxed paper bag. Therefore, for better management of litchi fruit borer, application of neem leaf extract (T4) and white waxed paper bag (T3) could be as eco-friendly and cost-effective tactics for healthy litchi production.

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