生物源除草剂壬酸对非耕地杂草的防治作用

为了了解壬酸制剂对非耕地杂草的防除效果，研究了30%壬酸水乳剂(EW)对非耕地一年生禾本科、阔叶类以及其他类杂草的田间实际防治效果。通过划分小区施药后，调查药后3天，5天和7天的覆盖率防效及7天的鲜重防效。结果表明，供试30%壬酸EW有效成分25~40 kg/hm2（制剂用量83.4~133.3 L/hm2）对各类杂草均有良好的防治效果。施药后7天覆盖度防效及鲜重防效均超过85%，与对照药剂20%百草枯AS有效成分0.45 kg/hm2（使用剂量2.25 L/hm2）差异不明显。其中，30%壬酸EW有效成分40 kg/hm2（制剂用量133.3 L/hm2）对禾本科及阔叶类杂草的覆盖率防效高达94.87%和92.36%，鲜重防效高达95.28%和92.66%。壬酸具有速效性、触杀性和非选择性的作用特点，能够达到生产实践中防除非耕地杂草的要求，值得进一步研究开发。

EfEffects of Bioherbicide Pelargonic Acid EW on Weeds Control in the Uncultivated Field

The aim was to study the control effects of pelargonic acid. The effect of 30% pelargonic acid on annual gramineous weeds and broad leaf weeds control in the uncultivated field was studied in this paper. By dividing testing areas and drug treating, the coverage and fresh weight control effects were investigated after 3 days, 5 days and 7 days treatment. The results indicated that, a variety of annual weeds could be well controlled with 30% pelargonic acid EW at the active ingredient contents of 25-40 kg/hm2 （the test concentrations of 83.4 L/hm2 to 133.3 L/hm2 ）. After 7 days treatment, the coverage and fresh weight control effects on annual weeds reached 85%, which were not significantly different from the contrast paraquat AS at the active ingredient contents of 0.45 kg/hm2 （the test concentration of 2.25 L/hm2）. However, the coverage effects of 30% pelargonic acid EW at the active ingredient contents of 40 kg/hm2 （the test concentrations of 133.3 L/hm2 ） on gramineous weeds and broad leaf weeds highly reached 94.87% and 92.36% respectively as well as the fresh weight control effects reached 95.28% and 92.66% respectively. Pelargonic acid’s characters of efficiency, contacting and non-selectivity could meet the demand of weeds management in the uncultivated field, which is worth further researching and exploiting.