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【目的】探索一种高效、快速、安全的灭杀罂粟的化学防除方法,为利用除草剂快速灭杀罂粟提供理论基础和技术依据。【方法】在罂粟花蕾期用不同浓度的2甲4氯对植株进行喷施,喷后连续采样4d测定叶片相对含水量(RWC)、丙二醛(MDA)含量、质膜相对透性(RC)、超氧化物岐化酶(SOD)及过氧化物酶(POD)活性,研究各生理指标与处理浓度及处理时间的关系。【结果】随着2甲4氯浓度的升高,罂粟叶片POD、SOD活性和相对含水量随着喷药时间的延长呈下降趋势,在喷药后第4d,8g/L2甲4氯浓度处理的罂粟叶片POD、SOD活性和相对含水量最小,活性最低;MDA含量和细胞质膜相对透性随2甲4氯浓度增加呈先升高后降低的趋势。【结论】1、2、4、8g/L2甲4氯浓度处理在喷后4d左右均可有效灭杀罂粟植株,且浓度越高灭杀时间越短。在实际应用时需根据环境条件和时间要求,选择相应的药剂浓度。
【Objective】 To explore a chemical control method for killing poppy in an efficient, rapid and safe way, providing the theoretical basis and technical basis for the rapid elimination of opium poppy with herbicides. 【Method】 The plants were sprayed with different concentrations of MCPA at the bud stage of poppy. After spraying for 4 days, the relative water content (RWC), malondialdehyde (MDA) content, relative permeability of plasma membrane (RC ), Superoxide dismutase (SOD) and peroxidase (POD) activity were studied. The relationship between each physiological index and treatment concentration and treatment time was studied. 【Result】 With the increase of MCPA concentration, the activities of POD and SOD and the relative water content of poppy leaves decreased with the prolongation of spraying time. At 4 days after spraying, 8g / Of poppy leaves had the lowest POD activity and relative water content and the lowest activity. The content of MDA and the relative permeability of plasma membrane increased first and then decreased with the increase of MCPA concentration. 【Conclusion】 Poppy plants can be effectively killed by spraying 1, 4, 4 and 8g / L of methyl chloride for about 4 days after spraying. The higher the concentration, the shorter the killing time. In practice, according to environmental conditions and time requirements, select the appropriate concentration of the drug.