What are the control methods for mung bean ring spot?
What harm does mung bean ring spot cause? How is mung bean ring spot controlled? Is there a fellow netizen who can help explain? Zhongdiwang has compiled the harm and control methods of mung bean ring spot, listed below for netizens' reference. Harm of mung bean ring spot: mung bean ring spot mainly damages the leaves. Mung beans can be infected after emergence...
What harm does mung bean ring spot cause? How is mung bean ring spot controlled? Is there a fellow netizen who can help explain?Zhongdiwang has compiled the harm and control methods of mung bean ring spot, listed below for netizens' reference.
Harm of mung bean ring spot:
Mung bean ring spot mainly damages the leaves. Mung beans can be infected after emergence, but most cases occur in the later stage. When leaves are infected, brown circular spots first appear, with reddish-brown edges. Distinct concentric rings appear on the spots, and later many small brown dots form on the spots, namely the pathogen's pycnidia. The spots tend to break apart when dry, and severely affected leaves drop early, affecting pod set.
During the growing season, warm weather, high humidity, or excessive planting density creating high humidity between plants all favor the occurrence of this disease. Excessive application of nitrogen fertilizer causing overly vigorous plant growth, or insufficient fertilizer causing weak plant growth, both lead to severe disease.
Control methods for mung bean ring spot:
Spray early at the initial stage of disease with 77% Keshibao wettable microgranule powder at 500 times dilution, or 30% basic copper sulfate suspension concentrate at 400-500 times dilution, or 47% Jiareinong wettable powder at 800-900 times dilution, or 20% thiophanate-methyl wettable powder at 1000 times dilution + 75% chlorothalonil wettable powder at 1000 times dilution, or 40% carbendazim·sulfur suspension concentrate at 500 times dilution, once every 7-10 days, for a total of 2-3 applications.
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