Is there a black spot after the apple is unpacked? Is it calcium deficiency?
2024-06-14 08:06:35
A: No, it is a black spot caused by Trichophyton rubrum, which usually occurs after continuous alternating high temperature and high humidity. It can be sprayed evenly and evenly before bagging, and 120 times of 120 wettable powder plus 80% of Dasheng M-45 wettable powder 800 times liquid or 68.75% easy water retention powder 1200 times liquid. If it rains during bagging, make up the spray and continue to bag.
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