UTILIZATION OF PHEROMONE TRAPS FOR THE MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER, Leucinodes orbonalis GUENEE (LEPIDOPTERA: CRAMBIDAE)
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Date
2014-06
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University of Horticultural Sciences, Bagalkot
Abstract
Studies “on Utilization of pheromone traps for the management of brinjal shoot and fruit borer, Leucinodes orbonalis Guenee (Lepidoptera: Crambidae)” were carried out during 2013-2014 at College of Horticulture, Bagalkot, University of Horticulture Sciences, Bagalkot. Among the different trap designs tested for their efficacy, Water trap found to be more superior in terms of male moth catches of L. orbonalis as compared to Funnel trap, Fligh-T trap, Cross winged trap and Delta sticky trap. During first trial, the mean number of male moth catches in Water trap, Funnel trap, Fligh-T trap, Cross winged trap catches were 17.10, 0.05, 0.20 and 0.00 moths per trap per week, respectively. Similar trend with respect to male moth catches was observed in second field trials also. Lure longevity study revealed that, after 2 months of exposure period under field conditions, the left over pheromone was 1.55 mg per lure. Hence, results clearly indicated that, the shelf life of brinjal shoot and fruit borer pheromone lure under field conditions last for two months. Weather factors viz., temperature, relative humidity, wind speed and rainfall had no significantly correlation with pheromone release rate and male moth catches of brinjal shoot and fruit borer. Management of brinjal shoot and fruit borer study revealed, that the significantly higher yield (90.12 q/ha) and benefit-cost ratio (0.86) recorded in mass trapping as compared to farmers’ practice (74 q/ha and 0.41, respectively). However, the per cent shoot and fruit damage was found statistically on par in both the practices, installation of water trap at the rate of 50 per hectare was found to be effective in managing brinjal shoot and fruit borer as compared to farmers’ practices in spite of number of insecticides applications were made.
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