In a long-term operation of vegetable greenhouses, a vegetable farmer in Daeyeong-cho, Tottori Prefecture, Japan has developed a set of properties that use liquid wood vinegar to make it easy to volatilize. The bottle of diluted wood vinegar is suspended in a greenhouse to prevent and control it. Practical Techniques for Pests and Diseases in Greenhouse Vegetables. The specific production method is as follows: First, prepare 1.25 liters of waste plastic bottles commonly used in daily life, wash and dry them, and cut 4-6 ports around the plastic bottles so that the liquid of wood vinegar can be volatilized. Then, according to the ratio of 1:5000, the stock solution was diluted with clean water and filled into a prepared 1.25-liter plastic bottle in units of 500 ml. Second, it is advisable to hang 6 bottles in a 60-meter-long greenhouse. That is, 1 bottle is hung in each corner of the greenhouse, and 2 bottles are hung in the center of the greenhouse. The practical technology adopted by the farmer has achieved good results in the spinach production in the greenhouse.