The disinfection of grape seedlings (including seed and seedlings) is an important measure to prevent the traditional broadcast of pests and diseases. Autumn and winter are important seasons for the sale and purchase of grape seedlings. Therefore, the disinfecting treatment of grape seedlings is a problem that must be paid high attention by grape-growing companies and farmers. The disinfection method is described as follows:
I. Disinfection methods for insect pests
1, using pharmaceutical agents. Use 50% phoxim 800-1000 times solution, or use 80% dichlorvos 600-800 times solution, soak branches or seedlings and soak for 15 minutes. After soaking, it is air-dried and then packaged for transport or planted.
2, using fumigation approach. Methyl bromide fumigation, the seedlings placed in a closed room, fumigation at 20-30 degrees Celsius for 3-5 hours, the amount of methyl bromide is about 30 grams / cubic meter, under low temperature conditions can be properly increased the use of dose, high temperature Under the conditions, the dosage should be appropriately reduced. When fumigation, you can use electric fan blowing to promote the air flow and improve the fumigation effect. When fumigation, seedlings should be prevented from dehydration.
Second, comprehensive treatment methods for insect pests and diseases
Seedlings are first soaked in warm water at 43-45 degrees Celsius for 2 hours, and then soaked in a solution of copper sulfate and dichlorvos for 15 minutes. After soaking, remove them and dry them for transportation or planting. Preparation method of compound solution of copper sulfate and dichlorvos: Add 1 kg of copper sulfate and 80% of dichlorvos in 150 kg of water per 100 kg of water and mix evenly.
Third, the timing of disinfection
Disinfection of grape seedlings must be disinfected before seedlings are transported. When planting, it is best to conduct another disinfection.