Vol. 10, Special Issue 11 (2021)

Author(s):
Komarasani Neelima, Amol Kakde, Sasya Thakur and U Venugopal

Abstract:
Shoot and fruit borer (Earais vittela Fab.) is a economically important insect pest of okra to manage this pest indiscriminate use of insecticides its leads to high pest residues in crop, environmental pollution and high cost of cultivation and lower net returns. In this view, the present study eight botanical extracts i.e., papaya leaf extract 10%, jatropha leaf extract 5%, marigold leaf extract, onion bulb extract 5%, neem oil 3%, tobacco leaf extract 5%, cypermethrin 25 EC 2% against E. vittela and compared by measuring fruits and shoot infestation and cost-benefit ratio. Results revealed that the shoot and fruit infestation was significant lowest at cypermethrin 2% (9.67%, 11.25%) followed by neem oil 3%(10.74, 12.21), jatropha leaf extract 5% (11.98%, 14.20%), papaya leaf extract 10% (12.85%, 14.89%), onion bulb extract 3% and marigold leaf extract 5% were least effective botanicals (20.39%, 20.60%),(14.22%, 16.02%) compared with untreated control (24.39%, 23.72%).Benefit cost ratio was recorded highest in cypermethrin 2% (1:2.90, 98.88 q/ha), (treated as check) followed by neem oil 3% (1:2.68, 90.53 q/ha), tobacco leaf extract 5% (1:2.44, 86.33 q/ha), jatropha leaf extract 5% (1:2.46, 82.38 q/ha), papaya leaf extract 10% (1:2.29, 77.52 q/ha), onion bulb extract 3% (1:2.05, 68.70 q/ha), marigold leaf extract 5% (1:1.62, 54.21q/ha) and untreated control (1:1.35,43.78 q/ha) respectively. The results indicated that neem oil 3% helpful for managing the shoot and fruit borer.