Effect of different concentrations of pesticide-imidacloprid on the main secondary metabolites of fruit and polysaccharide of Chinese wolfberry | 不同浓度吡虫啉对枸杞果实主要次生物质与枸杞多糖的影响
2011
Ren Bin, Agricultural College of Ningxia University, Ningxia, Yinchuan（China） | Kang Jianhong, Agricultural College of Ningxia University, Ningxia, Yinchuan（China） | Wu Hongliang, Agricultural College of Ningxia University, Ningxia, Yinchuan（China）
[Objective] The aim was to seek the appropriate utilization methods for imidacloprid pesticide in the production of Chinese wolfberry, as well as to provide scientific basis for the rational use of imidacloprid pesticide. [Method] The effect of different concentrations and spraying times of 10% WP of imidacloprid on the main secondary metabolites such as carotenoid and flavone, as well as the polysaccharide and total sugar content was studied in field. [Result] The effect of different concentrations of imidacloprid on the secondary metabolites and the content of polysaccharide of Chinese wolfberry was significant. After imidacloprid spraying, the contents of flavone, polysaccharide and total sugar on the 1st, 7th and 14th d showed increasing trend, while the content of carotenoid showed decreasing trend. With the dilution times increasing, the content of the flavone, polysaccharide and total sugar showed increasing trend, while the content of carotenoid decreased, in which the highest content of the secondary metabolites and polysaccharide appeared in 1 800 times. [Conclusion] The dilution ratio of 1 800 times should be selected as the appropriate dosage of 10% WP of imidacloprid.
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