author(s)
Srasvan Kumar G, SVS Raju and Swathi Yadav Kattula

abstract
Impact of abiotic factors on the population fluctuations of sucking insect pests on okra crop were assessed in the present studies conducted at Vegetable Research Farm, BHU, Varanasi during Kharif season 2014-15 and 2015-16. Incidence of jassids was started during 35^th SW (15 days after sowing), while initial aphids and whitefly infestation was observed during 36^th SW. However, peak population of Jassids had been observed during 40 SW while aphids and whiteflies peak population was observed at 41^st SW. In the field sucking insect population persisted up to 46^th S.W. (3^rd week of November). The aphid population was positively influenced by morning R.H (r = 0.768 and 0.614 during both the years), evening R.H. (r = 0.587 during 2015-16) and average R.H. (r = 0.587 during 2015-16) while negatively (r = -0.720 during 2015-16), influenced by rainfall but not significantly influenced by other weather parameters. The Jassid incidence was also positively influenced by morning R.H. (r = 0.861 during 2014-15) and average R.H. (r = 0.587 during 2015-16), while the whitefly incidence found to have significant positive relationship with morning R.H. (r = 0.782 & 0.608) during both the years and with average R.H. (r = 0.699) during 2015-16.