Population Dynamics of Sucking Pests of Soybean and their Natural Enemies in Relation to Weather Parameters

Author: Bala Muralidhar Naik R.*, Vijaya Lakshmi K., Venkataiah M., Srinivas. C., Uma Devi G. and Radhakrishna K.V.

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Abstract

Field experiments were carried out at research farm, Polasa, Regional Agricultural Research Station, Jagital during 2014-15 and 2015-16 on soybean variety JS-335. During the course of study at various growth stages four sucking pests namely, whitefly (Bemisia tabaci Gennadius), jassid (Empoasca kerri Pruthi), aphids (Aphis craccivora Koch) and thrips (Thrips tabaci Lindeman) and one natural enemy, namely, lady bird beetle (Cheilomenes sexmaculata) were observed to prey on these sucking pests. The peak activity of sucking pests that is, B. tabaci (5.43 whiteflies/3 leaves) was noticed during 34th std week during 2014 and for the year 2015 6.05/3 leaves during 35th std week and E. kerri (2.5 jassids /3 leaves) during 36th std week for the year 2014 and for the year 2015 was recorded (2.6jassid/3 leaves) during 34th std respectively. Thrips (1.8 thrips/3 leaves) during 34th std week for the year 2014 and for the year 2015 was recorded (2.9/3 leaves) during 33rd std respectively. Aphid

Keywords

Soybean, sucking insect pests, population dynamics, weather parameters, correlation and multiple linear regressions.