75%环嗪酮水分散粒剂对森林防火道除草灭灌药效试验

Efficacy Test of Hexazinone 75% WG on the Control of Broadleaf Weeds and Miscellaneous Shrubs for the Fireproof Forest Belt

75%环嗪酮水分散粒剂防除森林防火道杂草灌试验表明:在所设计的处理中,株防效和防火效果随剂量的增加而增加,且对试验地狗尾草、三方草、野菊、芒萁骨、构树、野蔷薇等杂草灌防除效果在有效成分含量(1968.75g/hm2)相同的条件下优于60%草甘膦可溶性粒剂。75%环嗪酮水分散粒剂防除森林防火道杂草灌推荐用药量为2625～3000g/hm2。

The efficacy test ofhexazinone 75% WG on the control ofbroadleafweeds and miscellaneous shrubs for the fireproof forest belt was analyzed. The results showed that stem control effect and fireproof effect increased with increasing the dosage in all treatments. Meanwhile, the control effect of most of broadleaf weeds and miscellaneous shrubs containing Setaria viridis, Carex brownii, Dendranthema indicum, Dicranopteris dichotoma, Broussonetia papyrifera and Rosa multiflora for the study area were better than the effect of glyphosate 60% SG under the same content of active components which were 1 968.75 g/hm2. From the view of economy, safety and validity, the drug dosage is recommended for 2 625-3 000 g/hm2.