What medicine is used for grape black pox?

Before the grape blossoms, 75% chlorothalonil wettable powder 600 won 700 times liquid, 80% propiconium zinc wettable powder 800 won 1000 times liquid and other medicament control can be sprayed. At the initial stage of the disease after flowering, 70% methyl thiophanate can be sprayed with 800Mel 1000-fold liquid and other chemicals to control. In the middle stage of the disease, 40% flusilazole EC 5000 / 10000 times can be sprayed to control the disease.

1. Brief introduction of grape black pox

Grape black pox mainly harms the green tender parts of grape, such as fruit, fruit stalk, leaf, petiole, new shoot and tendrils and so on. After the injury of the leaves, there were large brown spots on the needle at the initial stage, then developed into a round spot with a yellowish brown diameter of 1-4 mm, turned gray in the middle, and finally dried and hardened the diseased tissue and fell off into a perforation. Green fruit susceptible to the initial brown spots, gray-white in the middle of the spot, slightly sunken, the edge of reddish brown or purple like "bird's eye" shape, a number of small spots combined into large spots, later plaque hardening or cracking. After the new shoots, petioles, fruit stalks and tendrils are infected, they initially produce round brown dots, then turn into grayish black, the middle of which is sunken into dry and cracked ulcer spots, and the serious ones finally wither or die.

Second, when does grape black pox disease come on?

The prevalence of black pox is closely related to rainfall, atmospheric humidity and young plants, especially Rain Water in spring and early summer (April-June). In rainy and humid weather, the disease occurred seriously, and in dry years or areas with less rain, the incidence was significantly reduced.

The disease began to appear in South China from late March to late April, and reached the peak in mid-late June. The disease was restrained after July-August. When it was rainy in autumn, the disease could occur again. The disease generally began in mid-late May in North China, and the disease was at its peak in the high temperature and rainy season from June to August, and the disease stopped after October. The disease began in the first and middle of April in East China, and the disease was at its peak in the plum rain season. The disease was suppressed from July to August, and developed again from September to October, such as more autumn rain.

Third, what medicine is sprayed to prevent and cure grape black pox?

1. Before flowering, the grape can be sprayed with 80% propionium zinc wettable powder 800 times liquid, 75% chlorothalonil wettable powder 600 times liquid, 65% Dysen zinc wettable powder 500 times liquid, 86.2% copper hydroxide suspension 1000ml 1500 times liquid, 70% mancozeb wettable powder 600ml 800 times liquid and so on.

2. The initial stage of grape disease after flowering: 70% methyl thiophanate wettable powder 800Mel 1000 times solution, 3% Zhongshengmycin wettable powder 600MUE 800 times liquid, 25% pyrimethrin suspension 800MUE 1250 times liquid, 32.5% mancozeb ·diniconazole wettable powder 400MUE 600 times solution, 65% benzyl methyl. Azoxystrobin SC (legendary) 4000 times solution, 25% tebuconazole water emulsion 1000ml 2000 times and other agents were sprayed.

3. In the middle stage of the disease, 40% flusilazole EC 5000 times, 50% imipramine manganese salt wettable powder 1500 times, 40% thiabendazole EC 1000 times, 10% difenoconazole water dispersible granules 2000 times, 12.5% uniconazole wettable powder 20003000 times, 50% carbendazim wettable powder 800ml 1000 times, 50% promethazol wettable powder 800ml 1000 times. 1.5% more than 800 times antimycin and other agents were sprayed.