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 investigation was carried out to know the seasonal incidence of aphids and their level of infestation on yard long bean during Kharif 2018 and Rabi 2018-19 at AHRS, Bhavikere, UAHS, Shivamogga, Karnataka. The short duration yard long bean variety Arka Mangala was found infested with many number of sucking pests at various stages of crop growth. Among the different sucking pests recorded on yard long bean, aphids, Aphis craccivora Koch was the major pest causing yield loss under open field condition. The incidence of aphid was noticed throughout the cropping period. During Kharif the aphid population ranged from 2.82 to 72.37 aphids per leaf. Whereas during Rabi the aphid population ranged from 1.20 to 79.57 aphids per leaf. During Kharif the incidence of aphids was significant and positively correlated with the maximum temperature, maximum relative humidity and minimum relative humidity. Whereas, minimum temperature and rainfall showed a significant and negative correlation with aphid population. During Rabi, it was significant and positively correlated with the maximum and minimum temperature, rainfall and maximum relative humidity. Whereas, minimum relative humidity shows a non-significant negative correlation with the aphid population.
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