期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 64, 期 49, 页码 9276-9285出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b03430
关键词
neonicotinoid seed treatment; A. gossypii (Glover); natural enemies; leave residue; soil residue
资金
- National Key Research Development Program of China [2016YFD0200500]
- Natural Science Foundation of Shandong Province [ZR2015CQ017]
The effects of eight neonicotinoid seed treatments against the cotton aphid Aphis gossypii and its natural enemies in Bt cotton fields were evaluated, and the concentrations of these neonicotinoids in cotton leaves and soil were also investigated. The results showed that all neonicotinoid seed treatments efficiently reduced A. gossypii populations throughout the cotton seedling stage. The percentages of curly leaf plants in all of the neonicotinoid seed treatments were below the threshold for economic loss. Among the eight tested neonicotinoid seed treatments, nitenpyram, dinotefuran, and thiamethoxarn showed high control efficiency against A. gossypii. Residues of the three neonicotinoids were higher than those of other neonicotinoids in cotton leaves. Moreover, residues of dinotefuran and nitenpyram remained at low levels in the soil. However, the abundance of natural enemies in the cotton field was to some extent influenced by neonicotinoid seed treatments. Therefore, neonicotinoids nitenpyram, dinotefuran, and thiamethoxam used as seed treatment can provide effective protection that should play an important role in the management of early-season A. gossypii in Bt cotton fields; however, the risks of neonicotinoids to the environment should also be considered.
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