Objective Application of aqueous suspension of Bacillus thuringiensis subsp. israelensis (Bti)on the control of blackfly in the lower reaches of Irtysh River in Xinjiang Uygur Autonomous Region. Methods The pesticidal activity of Bti on blackfly larvae was tested through bioassay and field experiments, respectively. The LC50 and LC90 were computed by the Probit regression analysis method in the SPSS 19.0 software. Results The Bti aqueous suspension is an effective pesticide for blackfly control. The bioassay result suggested the LC50 was 0.034×10-6 g/ml and the LC90 was 0.118×10-6 g/ml. In field tests, the control efficacy of blackfly larvae was more than 83.21% in 12 h and more than 97.07% in 24 h. From 2013 to 2015, the adult population density of blackfly in the continuous application area decreased by 89.43%. Conclusion Bti aqueous suspension is an effective pesticide to control blackfly larvae, which is efficient for the prevention and control of adult blackfly in the lower reaches of the Irtysh River in Xinjiang Uygur Autonomous Region.
BAI Di, LIU Hai-zhou, CAI Quan-xin, YUAN Zhi-ming, ZHANG Jing-chang, CHEN Gui-hong, JIN Yu-hua, CHEN Yan-fang, LIANG Bang-xin, SONG Guang-chao, YAN Jian-ping
. Study on blackfly control by Bacillus thuringiensis subsp. israelensis aqueous suspension in the lower reaches of Irtysh River in Xinjiang Uygur Autonomous Region, China[J]. Chinese Journal of Vector Biology and Control, 2018
, 29(3)
: 231
-234
.
DOI: 10.11853/j.issn.1003.8280.2018.03.003
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