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 |
Investigation on the population dynamics of sugarcane plassey borer, Chilo tumidicostalis Hmpsn (Lepidoptera: Pyralidae) was carried out in laboratory and fields during 2014-15 and 2015-16. The cane damaged by the insect started in case of primary infestation from first fortnight of April 2014 with a peak (10.36%) in the first fortnight of July. In the case of secondary infestation, per cent incidence of the cane was observed lately in the second fortnight of June with a highest peak (19.53%) in the first half of November. The larval population of insect in case of primary and secondary infestation was observed in second fortnight of April and August for both the year, 2014-15 and 2015-16 respectively. Cotesia flavipes was an important potential parasitoid parasitizing 40.07 per cent in second fortnight of September and 39.04 per cent in second fortnight of September for the year 2014-15 and 2015-16, respectively. In the field maximum and minimum temperature, morning and evening relative humidity, total rainfall had positive correlation with the pest population while number of rainy days showed negative influence on the population build-up of the insect.
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