不同划伤茎秆方法对烟草黑胫病的防治效果研究

Study on The Efficacy of Different Methods of Slitting Stem on Tobacco Black Shank

为明确对烟草黑胫病病株防治效果最佳的划伤茎秆方法,利用L9(34)正交试验法,研究不同划伤烟株茎秆方法对烟草黑胫病的防治效果。结果表明:划伤茎秆的深度和部位是影响划伤茎秆防效的主要因素,深度以达到髓部为最佳,部位以自茎基部纵向向上划伤为最佳。最佳划伤茎秆方法是自烟株茎基部纵向向上划伤茎秆10cm、伤口深度达茎秆髓部,处理10d、20d后对烟草黑胫病的防效分别达79.02%、91.30%。

In order to determine the optimum method of Slitting stem for controlling tobacco black shank,the efficacy of different methods of slitting stem on were studied with L9(34)orthogonal test.The results showed that:depth and position of slitting stem were main factors affecting efficacy;reaching the pith was the optimum depth;the optimum slitting position was longitudinal cut from the base of stem.The optimum method of slitting stem was cutting the stem 10cm from the base of the stem vertically,and the depth of the cut reached to the pith of the stem,the control effect could reach 79.02%and 91.30%after 10 and 20 days treatment.