摘要： 改变传统的将乙嗪合剂加工成乳油或可湿性粉剂的惯例,研制出一种新型的水基性除草剂—28%乙嗪悬乳剂。温室盆栽试验表明,乙草胺与嗪草酮混用对防除某些杂草有互补作用。采用孙云沛法测定表明,两者混用对牛筋草和苘麻有增效作用,对马唐和反枝苋有相加作用。对杂草马唐、藜和反枝苋使用后测定,28%乙嗪悬乳剂对玉米、大豆、花生的选择性指数分别为2.57,2.28和2.14,2.17。经1996～1998年田间试验表明,除沙性土壤外,28%乙嗪悬乳剂可以在大豆、玉米、花生地作为土壤处理型除草剂安全使用,适宜的剂量为2250～3000 g/hm⊃2;,对一年生单、双子叶杂草的防效在多雨年份可达94.2%～99.0%,干旱年份可达81.2%～84.5%。并对28%乙嗪悬乳剂的关键加工技术,物化性能和安全使用技术作了论述。

关键词: 乙草胺, 嗪草酮, 水基性制剂, 农药制剂加工, 除草剂混用

Abstract: A change on the traditional foremulation with acetochlor mixed metribuzin was described in this paper,which used to formulate into EC and WP.New formulation was a kind of water based one (28% suspoemulsion of acetochlor mixed metribuzin).The application of this suspoemulsion had a very practical significance in decreasing pesticide pollution in environment and optimizing the cost and efficiency of weed control.Pot experiments in green houses showed that it was complementary to the mixture with acetochlor and metribuzin in the control of some weeds.Yun pei Sun method was used in the tests of pesticide interaction and the results indicated that the mixture had a synergetic effect on Eleusine indica or Abutilon theophrasti and a additional effect on Digitaria sanguinalis or Solanum nigrum.The elective indices (crop ED₁₀/weed ED₉₀)were 2.57(corn),2.28(soybean)and 2.14～2.17(peanut),respectively.In 1996～1998,field experiments suggested that the mixture was safe when it was applied in the pre emergence stage of corn,soybean and peanut in any soil except sand soil.At the dosage of 2250～3000g/ha(formulation),the mixture could control annual monocot as well annual dicot.This mixture had satisfactory efficiencies in rainy and drought years,which were 94.2%～99.0% and 81.2%～84.5% respectively.The key processing technology,physiochemical properties,and application of the acetochlor and metribusin mixture were also described in this paper.

Key words: Acetochlor, Metribuzin, Water based mixture, Pesticide formulation, Herbicide mixture

中图分类号: 

• S482.49