硫磺硫酸铜膏剂防治果树腐烂病研究

Study on preventing Vals mali with ointement of 1.4% sulphur and cupric sulphate

通过 3年田间试验筛选出质量分数 1.4 %硫磺硫酸铜膏剂中硫磺硫酸铜最佳质量百分比为 1∶0 .4。经室内毒力测定 ,抑制苹果树腐烂病菌 Ec 5 0为 12 2 .0 95 6μg/g,共毒系数为 2 0 5 .4 0 95 ,增效倍数 1.0 5 1。连续两年田间重复药效试验表明 ,对苹果树腐烂病的防治效果为 86 .5 2 %～ 10 0 % ,年促进病疤单侧愈伤新组织宽度6 .5～ 18.8mm。

The optimal ratio of sulphur and cupric shlphate in ointemt of 1.4% sulphur cupric shlphate paste agents is 1∶0.4 through three years test in the fields.The determination of the poison power indoor indicates:to control the Valsa mali Ec 50 122.095 6 μg/g,the coefficient power to kill bacteria is 205.409 5,the increment multiple is 1.051.The experiment of inhibition effect in two succersive years showed the inhibition rate is 86.52%-100%,and the width of the single recovered tissue is 6.5-18.8 mm in a year.