【摘要】 为了降低化学农药用药量,降低环境污染,实现化学农药减量增效,测定了甲基二磺隆(mesosulfuron-methyl)和精■唑禾草灵(fenoxaprop-P-ethyl)复配对节节麦的联合毒力。结果表明,甲基二磺隆和精■唑禾草灵有效成分比例为3∶5、5∶13、1∶4、1∶6、7∶8时,其共毒系数分别为148. 6、146. 3、207. 0、155. 6、134. 2,均表现为协同增效作用,其中复配比例为1∶4时,共毒系数达到最大值207. 0。不同药剂以增效明显的配比混配使用,为节节麦的有效防治和农药的减量使用提供了更好的途径。更多还原

【Abstract】 To reduce pesticide dosage and environmental pollution and to realize time-saving and their improve efficacy,the co-toxicity of mesosulfuron-methyl and fenoxaprop-P-ethyl on tausch’s goatgrass was determined.Co-toxicity coefficients( CTC) were 148. 6,146. 3,207. 0,155. 6 and 134. 2 when the ratio of the effective components were 3 ∶ 5,5 ∶ 13,1 ∶ 4,1 ∶ 6,7 ∶ 8,respectively. The maximum CTC value of 207. 0 was obtained when the ratio of mesosulfuron-methyl and fenoxaprop-P-ethyl was 1 ∶ 4. All the proportions above were significant synergies. The application of mesosulfuron-methyl and fenoxaprop-P-ethyl at proper ratios provides an ideal method for controlling tausch’s goatgrass efficiently,and reducing pesticide dosage.更多还原