玉米种植中的农药使用效果评估与安全性研究

玉米种植中农药使用效果的评估与安全性的研究对于保障玉米产量和质量、维护农产品安全具有重要意义。通过评估农药的效果,可以提高农药利用效率,减少资源浪费。同时,通过研究农药的安全性,可以保障农产品的质量与安全,减少对环境和人健康的潜在风险。因此,进一步深入开展农药使用效果与安全性的研究,对于玉米种植业的可持续发展和农产品市场的竞争力提升具有重要意义。本文旨在探讨玉米种植中的农药使用效果评估与安全性研究。农药使用效果评估与安全性研究在玉米种植中具有重要意义。农药的合理使用可以有效控制玉米病虫害和杂草问题,提高玉米的产量和质量。而农药的不当使用可能会对环境和人类健康造成潜在风险。因此,对农药使用效果和安全性进行评估和研究非常有必要。

无公害蔬菜生产如何提高农药的使用效果

通过对农药合理混配、对症用药、适时用药、轮换用药等用药技术的详细介绍,阐明了只有科学合理地使用农药,才能最大限度地提高药效,减少副作用,保证蔬菜无公害生产。

Simultaneous Determination of Four Pesticide Residues in Fruit Juice by HPLC

[Objective] This study was conducted to develop a system for simultaneous determination of imidacloprid, diflubenzuron, thiabendazole and carbendazim in fruit juice by HPLC. [Method] Using acetonitrile as the extraction solvent, the pesticides in fruit juice were purified through a NH2 solid phase extraction （SPE） cartridge, then detected by HPLC. [Result] There was a good linear relationship between the peak area and the concentrations of imidacloprid, diflubenzuron, thiabendazole and carbendazim in a range of 0.05-5.0 μg/ml, and the linear correlation coefficient varied in a range of 0.999 0-0.999 8; the limit of detection for imidacloprid, diflubenzuron, thiabendazole and carbendazim was 0.003, 0.005, 0.003 and 0.007 mg/kg, respectively. The recovery rate of imidacloprid, diflubenzuron, thiabendazole and carbendazim standards added at three levels （0.1, 0.5 and 1.0 mg/kg） ranged from 82% to 107%, with RSD less than 4.5%. [Conclusion] The sensitivity, accuracy and precision of this method were able to meet the requirements for pesticide residue analysis.