Population Buildup of Red Spider Mite, Oligonychus Coffeae N. In Tea
Keywords:
<i>Oligonychus coffeae</i>, tea, seasonal incidence.Abstract
The present investigations entitled “Population buildup of red spider mite, Oligonychus coffeae N. in tea†were undertaken from May, 2022 to April, 2023 at Palampur, Himachal Pradesh in conventionally managed tea plantations and organic tea plantations. The mite population was maximum in conventional farming system (5.22 to 19.26/ per leaf) as compared to organic farming system (2.57 to 6.72). The peaks of activity were observed during May and October. Leaf infestation was more in conventional (61 - 99 %) as compared to organic farming system (39 - 82%). Infestation index was also observed highest in conventional tea plantations as compared to organic tea plantations. Population was at its minimum during December - February. Correlation studies revealed that the mite population was positively correlated with temperature (max. & min.) and sun - shine hours, but negatively correlated with relative humidity and rainfall.Downloads
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