Effects of neonicotinoid seed treatments on soybean aphid feeding behavior and gene expression in soybean

TL;DRAbstract

This research examined 1) the effects of a thiamethoxam seed treatment on soybean aphid, Aphis glycines Matsumura, feeding behavior using electronic penetration graphs, 2) neonicotinoid translocation within specific soybean tissues and 3) the physiological effects of a thiamethoxam seed treatment on soybean using transcriptional profiling. Soybean aphid stylet penetration behavior was not strongly affected by the thiamethoxam seed treatment during the initial 9 h feeding interval. However, after 9 h of exposure to thiamethoxam seed treatment aphids exhibited significant differences in feeding behavior compared to those feeding on untreated soybeans. Aphids on thiamethoxam-treated soybeans spent significantly less time feeding in the sieve element phase and exhibited a greater duration of non-probing events. These studies suggest soybean aphids may have difficulty ingesting phloem sap, which may be another important element in seed treatment protection. Translocation studies investigate

Chat with Paper

AI Agents for this Paper