The Evaluation Studies Of Thiamethoxam To The Quality Safety Of Honeysuckle Herbs

This article is to evaluate the control effect of thiamethoxam to honeysuckle aphid and establish its pesticide testing methods on honeysuckle herbs. It analyzed its digestion dynamics in honeysuckle herbs, and to study what impact thiamethoxam is for active ingredients of honeysuckle herbs. It put forward the standard recommendation of standardized planting honeysuckle in the safe use of thiamethoxam, and provide a scientific basis for the establishment of standardized planting honeysuckle safe use of pesticides standards. Specific results are as follows:1. By investigating status quo of the main origin of honeysuckle about honeysuckle pests and diseases and pesticide. Honeysuckle aphid infestation is a major pest, farmers use more imidacloprid, thiamethoxam and others to control pest.2. The field experiments of thiamethoxam to control honeysuckle aphid showed that 25% thiamethoxam water dispersible granules is security to honeysuckle and appropriate prevention to honeysuckle aphid. It can be better prevention and longer duration.3. The establishment of residue analysis method thiamethoxam in honeysuckle herbs. Using the method to test degradation dynamic and final residues of thiamethoxam in honeysuckle, which showed that the half-life of thiamethoxam on honeysuckle is 1.54～ 1.66d, and after application 7d, thiamethoxam digestion is more than 90% and the digestion speed is faster in honeysuckle.4. It is the preliminary study of the effects of different doses of thiamethoxam for chlorogenic acid and luteolin content in honeysuckle. Results for two years showed that thiamethoxam have influence on the content of chlorogenic acid content, No significant effect on the content of luteolin.5. According to domestic research and the results of this study, if the MRLs thiamethoxam in honeysuckle is recommended value of 0.1 mg · kg-1, it is recommended 25% thiamethoxam WG dose of 135 g · hm-2, spraying three times less every year, and the last interval of spraying and harvest time can be recommended as 14 d in administering standardized planting on honeysuckle.