Seasonal Incidence of Major Insect Pests of Oak Plant, Quercus Serrata Thunb. During Autumn Season in Manipur

Field study were conducted during 2019-20 and 2021-22 to study the seasonal incidence of insect pest infesting the oak plant, Quercus serrata, in correlation with weather parameters during the autumn season in Regional Sericultural Research Station, Imphal, Manipur.During the observation five different species of insect pests were found infesting Q. serrata during autumn season.Among these, four insect pests viz., the leaf roller, Apoderus notatus (Fabricius); shoot borer, Auletobius densatus Voss; semilooper, Hybalea puera (Cramer), hairy caterpillar, Phalera raya Moore were the major pests whereas the long horn weevil , Aristobia approximator Thomson were found as the minor pest.These insect pests belong to two orders (Coleoptera and Lepidoptera) and five families (Attelabidae, Rhynchitidae, Hyblaeidae, Notodontidae and Cerambycidae).While some of these pests were active for a brief period, others remained active throughout the duration of the study in both the years.A. notatus population showed peak during the second week of July, A. densatus during first week of September and P. raya was observed during the second week of July in both the years.