Field-Evolved Sulfoxaflor Resistance of Three Wheat Aphid Species in China

• Published in: Agronomy (Basel) Vol. 11; no. 11; p. 2325
• Main Authors: Li, Xinan, Wang, Chao, Li, Qiuchi, Zhu, Saige, Tian, Xujun, Zhang, Yunhui, Li, Xiangrui, Gao, Haifeng, Liu, Enliang, Wang, Liande, Zhu, Xun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-11-2021
• Subjects: Bioassays; Insecticide resistance; Insecticides; Insects; Pesticide resistance; Pests; Population; Populations; Rhopalosiphum padi; Sitobion miscanthi; Species; sulfoxaflor; Toxicity; toxicity difference; Wheat; wheat aphid; China
• ISSN: 2073-4395; 2073-4395
• DOI: 10.3390/agronomy11112325

Sulfoxaflor belongs to a new class of insecticides which are effective against many sap-feeding pests. Sitobion miscanthi, Rhopalosiphum padi, and Metopolophium dirhodum are the predominant pests coexisting on wheat plants. It is unknown whether these aphid species have developed resistance to sulfoxaflor. Here, the susceptibilities of three wheat aphid species from different regions of China to sulfoxaflor were evaluated. The results showed that two S. miscanthi, one R. padi, and two M. dirhodum field populations were highly resistant to sulfoxaflor. Additionally, 13 S. miscanthi, 9 R. padi, and 4 M. dirhodum field populations were moderately resistant to sulfoxaflor. Analysis of differences in toxicity showed that the susceptibility levels of R. padi in 9 of 20 regions, M. dirhodum in 5 of 9 regions, and M. dirhodum in 3 of 9 regions to sulfoxaflor were greater than those of S. miscanthi, S. miscanthi, and R. padi in the same regions, respectively. Thus, each wheat aphid species has field populations that are highly sulfoxaflor resistant. The R. padi and M. dirhodum populations were more susceptible to sulfoxaflor than those of S. miscanthi. These findings provide new insights into insecticide resistance development and rational sulfoxaflor use.