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Neonicotinoid insecticides are used for preventing insects from transmitting plant viruses. This group of chemicals are easily taken up by plants and translocated to different tissues and are applicable for soil treatment in sustained-release tablets, which greatly reduces environmental contamination compared to foliar spray. The goal of this study was to examine the efficacy of thiamethoxam, acetamiprid and nitenpyram in tablet formulation against whitefly, Bemisia tabaci, the vector of tomato chlorosis virus (ToCV) under laboratory and greenhouse conditions. Effective 50% lethal concentration (LC50) of thiamethoxam, acetamiprid, and nitenpyram on B. tabaci were 2.18, 0.46 and 0.18 μg/g plant tissue, respectively. In vitro test showed that tablets of 10 mg nitenpyram applied in seedbed with thiamethoxam transplanting treatment showed 80.9% control of B. tabaci on tomato and 75.5% of ToCV after 32 days of transplanting. Therefore, neonicotinoid tablets were an effective strategy of soil treatment in controlling viruliferous insects and ToCV with reduced environmental contamination.

Improved efficacy of neonicotinoid in tablet formulation on the control of tomato chlorosis virus by controlling the vector Bemisia tabaci