Abstract: In order to further verify the promotion value of bamboo vinegar compound agent, two test methods of indoor shed-growing bacteria and field random group were used to study the effect of bamboo vinegar compound dimetachlone and azolidinyl on tobacco brown spot and tobacco plant growth. The results showed that spraying the compound and azolidinyl could effectively prevent brown spot disease. The area of potted fungus cake was significantly reduced by 9.60% and 7.45% compared with water treatment, and the field control effect reached 86.72% and 86.50%, respectively. The difference between the two drugs was not obvious. At the same time, the compound agent could significantly promote the growth of tobacco plants. The plant height of potted tobacco plants changed from significantly lower than that before spraying with water treatment to insignificant. The maximum leaf length of tobacco plants in the field was significantly increased by 7.04% compared with water treatment.

Key words: tobacco brown spot, bamboo vinegar, dimetachlone, azolidinyl, compound agent