author(s)
Bhanderi GR, Patel RD, Desai HR, Patel AJ and Patel HV

abstract
Bistrifluron 10% EC at five different doses viz., 50, 75, 100, 125 and 250 g a.i. /ha along with acetamiprid 20% SP (20 g a.i/ha) and buprofezin 25% SC (250 g a.i./ha) as standard checks for whitefly, leaf hoppers, thrips, aphid and mealybug were evaluated for bio-efficacy under field condition during Kharif 2017-18 and 2018-19. After four rounds of spraying initiating at ETL of sucking pests at 10 days interval, bistrifluron (10% EC) @ 250 g a.i./ha recorded significantly lowest population of whiteflies (Av.3.57/3 leaves), leafhopper (Av.2.48/3leaves), thrips (Av.10.13/3leaves), aphid (Av.9.84/3leaves) and mealybug (Av.1.18 grade/plant) as well as maximum seed cotton yield followed by bistrifluron (10% EC) @ 125 g a.i./ha whiteflies (Av.4.58/3leaves), leafhopper (Av.3.28/3 leaves), thrips (Av.11.41/3 leaves), aphid (Av.11.49/3leaves) and mealybug (Av.1.40 grade/plant). Further, all the doses of Bistrifluron (10% EC) @ 50, 75, 100, 125 and 250 g a.i./ha were found significantly superior than standard check acetamiprid 20% SP and buprofezin 25% SC. Amongst five doses, lower dose (Bistrifluron 10 EC @50 g a.i. /ha) was found safer to predator populations. No phytotoxicity symptoms were formed at higher dose viz., 100 and 250 g a.i. /ha. Considering efficacy to sucking pests, higher seed cotton yield and no phytotoxicity to plants; Bistrifluron (10% EC) @ 125 g a.i./ha can be taken advantage of.