Grape disease and pest prevention: using these three sprayings well is the key
1. Peeling. In early spring, first lay a layer of plastic film under the grapevines, then peel the bark off the canes and let it fall onto the film; at the same time cut off diseased and pest-infested branches, gather them together with the bark scraps on the film and burn them outside the vineyard. 2. Deep plowing. Along with applying the grape bud-break fertilizer, carry out one deep plowing of the whole vineyard, with a depth of 2...
According to the climate in the recent period and the occurrence characteristics of grape diseases and pests, the current focus should be on preventing leaf diseases and fruit diseases, while also controlling pests, and persisting in using 3 sprayings well, with one control application every 10 days depending on the weather. To control diseases, the first application can use Bilu No. 2 33.5% copper quinolinate suspension concentrate (1500x dilution) plus 50% carbendazim wettable powder (500x dilution) or Bibei 80% Bordeaux mixture wettable powder 400-500x dilution by spraying; the second application use Baitai 60% pyraclostrobin·metiram water-dispersible granules (1500x dilution) plus Fuxing 40% flusilazole emulsifiable concentrate (8000x dilution), or Kebo 78% Bordeaux·mancozeb wettable powder (400-500x dilution) plus Amistar 25% azoxystrobin suspension concentrate (1500x dilution) by spraying; the third application use Penco 80% mancozeb wettable powder (500x dilution) plus 70% thiophanate-methyl wettable powder (700x dilution) by spraying. To control pests, at each application add an insecticide according to the occurrence of pests in the field, and you may choose Jianmie 10% beta-cypermethrin emulsifiable concentrate 3000x dilution, Zunkui 2.5% emamectin benzoate water-dispersible granules 1500x dilution, Miechongling 0.6% abamectin emulsifiable concentrate 1500x dilution, etc. Pay attention to controlling the pesticide concentration, alternate and rotate the pesticides, and stop applying pesticides 10-15 days before grape harvest.