Document Type : Original Article
Authors
1
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
2
2- Central Agricultural Pesticides Laboratory, Agricultural Research Center, Dokki, Giza, Egypt.
Abstract
Experiments were conducted in the experimental Research Station, Qaha, Qalubiya Governorate on the autumn of 2015 and 2016.The current study aimed to evaluation the number , duration generation and efficiency of abamectin against Bemisiatabaci (Genn.), Liriomyza. trifolii (Burg.), and Tetranychusurticae (Koch) infesting green bean (Phaseolus vulgaris) under field condition and residue determination of abamectin in green leaves and green pods . During the 2015 season, the whitefly, B.tabaci recorded two generations, but in the 2016 season, they were three generations. In ad dation, the leaf miner,L. trifoliiwas recorded three generations during two seasons 2015 and 2106. In casered spider, T.urticae gave three generations in the 2015 season but in the second season gave only two generations. Especially, efficiency of Abamectin the results revealed that the highest percentage of reduction of Whitefly, B.tabaci after 10 days (64.64 %) and the lowest reduction percentage (22.32%) after 21 day. L. trifolii, the highest percentage of reduction was after 21 days (28.64%) and the lowest percentage of reduction (18.17%) after 1 day. In case ofT.urticae,the obtained data indicated that the highest percentage of reduction of Spider mite after 3 days was (44.04%) while after 21 days was the lowest percentage of reduction (10.33%).Studying of the Abamectin residues on and in green leaves, unwashed green pods, washed green pods and boiling green pods recorded 7.98 ppm, 4.2ppm , 0.5 ppm and not detectable after two hours from spraying , washing processing cause dissipation 88.09 %loss from washed pods but in case boiling processing removed each Abamectin residues . The half-life measured in centuries Abamectin green beans leaves and unwashed green bean pods recorded 22.73 and 17.4 hours, respectively. The interval Preharvest (PHI) of Abamectin on the green beans pods for 17 day.
Recommendation :The paper recommended by abamectin spray on Phaseolus vulgaris against Bemisiatabaci (Genn.), Liriomyza trifolii (Burg.), with prevent green bean pods collected before 17 days from spraying.
Keywords
)
View on SCiNiTO