Black spot disease is known as black butt disease by fruit growers. The pathogen is pink trichothecene, which is mainly harmful to emeralds, big fruit crystals, gold, gold, and other varieties in the 20th century. Yali is also harmful. The main site of damage was near the mole, and irregular black spots began to appear from June to July. Part of the spots later produced pink hyphae.
The main effective drugs are: carbendazim, thiophanate-methyl, mancozeb, and schizophrenia, etc. The key prevention and treatment period is: before flowering, after flowering and before bagging, pay attention to uniform spraying.
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