Impact of Abiotic Factors on the Seasonal Incidence of Major Insect Pest of Quercus serrata Thunb., Primary Food Plant of Oak Tasar Silkworm, Antheraea proylei J. In Manipur, India

S. Subharani, Y. Debaraj, K. M. Vijayakumari

Abstract


The present study was aimed at observing the incidence pattern of major insect pest infesting oak plant, Quercus serrata. The oak plant was found to be infested by a number of insect pest out of which the two major pests i.e., hairy caterpillar, Phalera raya (Moore) and semilooper, Hyblaea puera (Cramer) was studied. The infestation of P. raya started in May and reached peak in July during 2017-18 and 2018-19 respectively. This pest disappeared from the field from November to April due to hibernation of the pupal stage in both the years. The semilooper was observed attacking the plant throughout the year except the months when oak plant sheds off their leaves. The infestation started from February and reached peak in May. The maximum, minimum temperatures and rainfall showed significant positive correlation with P. raya and H. puera, whereas, correlation with relative humidity was not significant in both the years

Keywords


Hairy caterpillar, Phalera raya, semilooper, Hyblaea puera, seasonal incidence, abiotic factors, correlation

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References


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