Welcome to Chinese Journal of Biological Control,Today is

Chinese Journal Of Biological Control ›› 2019, Vol. 35 ›› Issue (4): 542-547.DOI: 10.16409/j.cnki.2095-039x.2019.04.009

• RESEARCH REPORTS • Previous Articles     Next Articles

Negative Effects of the Four Insecticides on Coccinella septempunctata Linnaeus and Trichogramma dendrolimi Matsumura

GUO Zhixin, JIANG Hongyun, ZHANG Lan, MAO Liangang, ZHANG Yanning   

  1. Institute of Plant Protection, Chinese Academy of Agricultural Sciences/Ministry of Agriculture and Rural Affairs, Key Laboratory of Control of Biological Hazard Factors(Plant Origin) for Agri-products Quality and Safety, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
  • Received:2019-03-29 Online:2019-08-08 Published:2019-08-10

Abstract: Coccinella septempunctata Linnaeus and Trichogramma dendrolimi Matsumura are important natural enemies used in biological control of many pests. The safety and acute toxicity of four insecticides on the 2rd instar larvae of C. septempunctata and adults of T. dendrolimi were evaluated using the contact film method in the laboratory. Results indicated that the tested pesticides differed in their toxicities against the 2rd instar larvae of C. septempunctata. The formulation of 37% bifenthrin and clothianidin (EC), 45% imidacloprid and chlorfenapyr (EC), and 20% emamectin benzoate and indoxacarb showed LR50 of 0.0327, 5.0 and 1.25 g a.i./hm2 against C. septempunctata larvae respectively. The 24% chlorfenapyr and emamectin benzoate (EC) showed a high risk with LR50 of 6.90 g a.i./hm2, while the other three insecticides showed extremely high risks. As for T. dendrolimi, 37% bifenthrin and clothianidin (EC), 24% chlorfenapyr and emamectin benzoate (EC), 45% imidacloprid and chlorfenapyr (EC), 20% emamectin benzoate and indoxacarb, and exhibited LR50 of 2.35×10−3, 0.0129, 6.46×10−3 and 0.127 g a.i./hm2, respectively, all of extremely high risks. This study provides insight into the risk of the tested pesticides to C. septempunctata and T. dendrolimi.

Key words: biological control, chemical control, acute toxicity, safety assessment

CLC Number: