异噁唑草酮·噻酮磺隆在玉米不同种植区应用的除草效果和安全性研究

2016～2017年在东北春玉米种植区和黄淮海夏玉米种植区设立田间试验基地,研究除草剂异噁唑草酮·噻酮磺隆悬浮剂在不同区域玉米田播后苗前处理的杀草谱及除草效果、对玉米安全性及对下茬作物生长的影响。结果表明,26.7%异噁唑草酮·噻酮磺隆悬浮剂141.75～283.5 g ai/hm2在玉米播后苗前使用,对东北春玉米种植区主要杂草稗草、狗尾草、藜、反枝苋、苘麻、刺儿菜和黄淮海玉米种植区主要杂草马唐、牛筋草、反枝苋、马齿苋、铁苋菜等禾本科杂草和阔叶杂草均有理想效果,药后40～45 d,异噁唑草酮·噻酮磺隆上述处理对杂草鲜重防效仍在95%左右,可实现一次施药控制玉米全生长期的杂草,在玉米田具有较好的除草增产作用;对后茬播种的小麦、大豆、花生、油菜、菠菜生长无影响。

Study on Weed Control Efficacy and Crop Safety of Isoxaflutole·thiencarbazone-methyl Mixture in Two Corn Production Regions

Aimed at the selection of the substitute herbicides of atrazine in corn, field studies were conducted in Gongzhuling and Langfang, located in northeast spring corn region and in Huang-Huai-Hai summer corn region, respectively, to study the herbicide mixture containing isoxaflutole and thiencarbazone-methyl for weed control in corn as pre-emergence treatments in 2016 to 2017. Weed spectrum, control efficacy, corn yield and the injuries to the following crops, wheat, soybean, peanut, rape, spinach were evaluated in the two locations. All treatments controlled the regional dominant weeds Echinochloa crus-galli, Setaria viridis, Eleusine indica, Digitaria ciliaris, Amaranthus retroflexus, Portulaca oleracea, Abutilon theophrasti, Cephalanoplos segetum about 95% 40-45 days after application when the herbicide mixture was used 141.75-283.5 g ai/ha. Corn yield was increased by 103.9%-120.3% and 19.3%-25% comparing with the untreated plots in Gongzhuling and Langfang, respectively, and all the tested following crops were not affected by the carryover of the mixture in the soil.