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

CLC Number: 

• S482.49