National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The epilachna beetle (Henosepilachna septima Dieke) is one of the serious pests on cucurbits. The grubs and adults feed throughout the crop stages and results in skeletonising the leaves. The seasonal incidence of epilachna beetle and their natural enemy Quadrastichus ovulorum (Ferriere) was carried out during kharif and rabi, 2017-19. Field experiments were conducted in farmer’s field at Ellamanam village, Tiruchirappalli district. The incidence of epilachna beetle was found maximum from 40th SMW to 46th SMW (Standard Meteorological Week). The population of epilachna beetle was positively correlated with maximum temperature and wind direction and negatively correlated with minimum temperature, rainfall, relative humidity and wind speed. The egg parasitisation of epilachna beetle was found minimum and maximum during 45th SMW (33.33%) and 40th SMW (48.44%), respectively. The egg parasitisation was negatively correlated with maximum temperature, minimum temperature, rainfall, wind speed and positively associated with relative humidity. The minimum damage of leaves (1.11 %) and flower (4.44 %) followed by maximum damage in 46th (28.89 %) and 39th (16.67 %) SMW.
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