Seasonal incidence and management of major insect pests of brinjal (solanum melongena L.)
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Date
2020-12-30
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
Investigation of “Seasonal incidence and management of major insect pests of Brinjal (Solanum melongena L.)” was carried out on research farm of Department of Agricultural Entomology, College of Agriculture, Badnapur during Kharif 2019-20.
Incidence of aphids on brinjal ranged from 8.9 (33rd SMW) to 14.7(48th SMW) nymphs per three leaves. The peak incidence of aphid recorded (36.8 nymphs/3 leaves) at 44th SMW. The population of Leafhopper was started from during 33rdSMW. The peak incidence of Leafhopper recrded (11.7 nymphs/3 leaves) at 42nd SMW.The whitefly population on brinjal was ranged from 1.8(33rd SMW) to 3.1(49th SMW) adults/3 leaves plant. The population of whiteflies attained its peak of 13.8 at 44th SMW. The population of red spider mite (2.8 mites /4 cm2) was initiated on brinjal in 36thSMW and the peak population (12.8 mites /4 cm2) was observed in 46th SMW. The infestation of brinjal shoot borer was ranged from 6.4 (34th SMW) to 4.8 per cent (48th SMW). The peak of incidence was recorded as 32.8 per cent shoot infestation at (39th SMW). The incidence of brinjal fruit borer was ranged from 5.6 to 34.2 per cent during 38th to 48th SMW of observation. Pest incidence was recorded peak of 40.6 per cent in 42th SMW.The treatments where three application of biopesticide sprays as azadirachtin 1500 ppm, NSKE 5% and Verticillium lecaniiwere found effective against aphids, leafhopper and whitefly at 3,7,14 days after spray followed by treatment Beauveria bassiana, Metarrhizium anisoplae and Bt.Krustaki.
The treatments as azadirachtin 1500 ppm found at par with Bt.Krustaki and NSKE 5% found effective against shoot and fruit borer at 3,7,14 days after spray followed by Beauveria bassiana, Metarrhizium anisoplae and Verticillium lecanii. The data on the economics and ICBR of different biopesticide treatments azadirachtin 1500 ppm, NSKE 5%and Bt. Krustaki recorded higheryield and economical followed by Metarrhizium anisoplae, Verticillium lecanii and Beauveria bassiana etc.