Journal ID : AMA-25-04-2024-13008
[This article belongs to Volume - 55, Issue - 04]
Total View : 454

Title : CORRELATION BETWEEN POPULATION OF MAJOR INSECT PESTS AND WEATHER PARAMETERS IN CHILLI (CAPSICUM ANNUUM L.)

Abstract :

The present investigations were carried out at farmers’ fields, Jabalpur, Madhya Pradesh (Central India) during Rabi 2017-18 and 2018-19 growing seasons. Regular weekly observations were recorded in chilli crop on farmers' fields, at four locations, during both the years. Studies on the correlation of insect pests and natural enemies in chilli crop revealed that five species of insects i.e. whiteflies, Bemisia tabaci (Gennadius), thrips, Scirtothrips dorsalis Hood, jassids, Amrasca biguttula biguttula (Ishida), Mites, Polyphagotarsonemus latus (Banks), and fruit-borers, Helicoverpa armigera Hubner, one species of predator Coccinella transversalis Fabricius and also leaf curl incidence correlation with whiteflies to be a workout. During 2017-18 the correlation studies revealed that the minimum temperature, morning vapor pressure, and evaporation had a significant negative correlation (r= -0.471, -0.498, and -0.458 respectively) with the whiteflies population, whereas, none of the weather parameters showed a significant impact on thrips and fruit borer population. Rainfall had a significant positive correlation (r= 0.476 and 0.478) with jassids & mites. During 2018-19 the correlation studies revealed that maximum temperature, minimum temperature, morning vapor pressure, evening vapor pressure, and evaporation had a significant negative correlation (r= -0.476, -0.547, -0.572, -0.431, and -0.464, respectively) with whiteflies population. Morning relative humidity had a significant negative correlation (r= -0.554) with the thrips population. Wind velocity had a significant positive correlation (r= 0.458) with the jassids population. Morning relative humidity and evening relative humidity had a significant positive correlation (r= 0.452 and 0.472 respectively) with the mite population, while evaporation had a significant negative correlation (r= -0.458) with it. Fruit borer did not show correlation with any weather factor. In the year 2017-18, the correlation studies revealed that rainfall had a significant positive correlation (r= 0.499) with the ladybird beetles population while during 2018-19 it was non-significant. During both the years, 2017-18 and 2018-19 Rabi season the leaf curl incidence did not show a significant correlation with the mean populations of B. tabaci during different meteorological standard weeks.

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