Field Efficacy Trials of Different Pesticides against Pieris rapae and Plutella xylostella

• Published in: Plant Diseases and Pests(植物病虫害研究：英文版) Vol. 5; no. 2; pp. 10 - 12
• Main Authors: Li, Zhao, Wenying, Hong, Yanjun, Wu, Yanxin, Wang, Rui, Chen, Linying, Zhang
• Format: Journal Article
• Language: English
• Published: Cranston Wu Chu (USA-China) Science and Culture Media Corporation 01.04.2014
• Subjects: Brassica; Control; effect; Pieris; Pieris rapae; Plutella; Plutella xylostella; rapae; xylostella
• ISSN: 2152-3932

Field efficacy trials of different pesticides against Pieris rapae and Plutella xylostella showed that seven pesticides had certain control effects against P.rapae and P. xylostella. 240 g/L Chlorfenapyr SC had the most ideal control effect,with quick effect and long persistence,and the control effects against P. rapae and P. xylostella were 91. 96% and 95. 73% after application for 7 d,respectively. 25% Thiamethoxam WDG 3 000 times dilution had the poorest control effect,and quick effect and persistence were not ideal; the control effects against P. rapae and P. xylostella were 49. 21% and 57. 20% after application for 7 d,respectively. The remaining pesticides had good control effect against both P. rapae and P. xylostella,with certain persistence. Slight injury such as yellowing tender leaves appeared in the area treated with 50% thiocyclam SP,although the injury was reversible,it was still not recommended to use; no other treatments had adverse effects on growth of cabbage.