Ethephon

Ethephon has the ability to promote lacquer production in sumac. Treatment time: Generally, after the paint production capacity enters the peak period, that is, in the first and middle of July, the 3-7 knives point flow paint volume is the highest, the quality is the best, and the treatment effect is the best, and it is treated with ethephon 1-2 times a year. The first time is from the end of June to the beginning of July, and the second time is in early August. If there is an early dryness, the second time can be postponed or not dealt with. Treatment concentration: according to the specific conditions of land conditions, tree body, growth, etc., the concentration of drug is 1% for poor fertility, small tree, and weak growth; moderate soil fertility, small tree, poor growth, lacquer forest has been opened, and drug is used. The concentration is 2%; if the soil fertility, tree body, and growth are moderate, the concentration of the drug is about 4%; if the soil is good, the tree body is large, and the growth is vigorous, the concentration can be increased to 4%-6%. It should not exceed 6%, otherwise it is prone to abnormal fallen leaves, and the moisture content in the raw lacquer will increase.