Pre-flower control grape black spot disease effect is good

Grape black spot is a fungal disease. It is mainly wintered in the grape disease and the cortex of the branches. After the second year of growth, the local temperature reaches 22°C, and when the humidity reaches 80%, the blackpox disease begins to harm. The main damage to the tender young leaves, young ears and other young organizations, when there is a large black tip, it is the initial symptoms of blackpox. Therefore, should be sprayed before the grape blossom control. First use 70% thiophanate-methyl wettable powder for water 1000 times, 75% chlorothalonil wettable powder 100 times for water or 10% for 3,000 times water. Spraying should focus on the following ear. For plants that are not affected, control should be performed three times in advance. The first pass should be sprayed seven days before the grapes bloom; the third pass can be sprayed with the second pass 10 days apart.

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