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Symptom Identification and Control Methods for Licorice Gray Leaf Spot
It damages the leaves, forming nearly round brown lesions with gray centers. Control methods: (1) Clear the garden in winter and dispose of plant debris. (2) During the disease period, spray 1:1:120 Bordeaux mixture or 70% thiophanate-methyl wettable powder at 1500-2000 times dilution.
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What are the control methods for the ginseng large gray weevil?
The large gray weevil, also known as the snout beetle or "tula lv", has an adult body length of 9-12 mm, grayish-yellow or grayish-black, densely covered with grayish-white scales. The head and rostrum are densely covered with golden shiny scales. The pests occurring this year mainly feed on tender stems and leaves on the soil surface during the seedling emergence period, causing great damage. When disturbed, they feign death and drop to the ground, causing damage in the early morning and evening....
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What are the control methods for ginseng gray mold?
How do you control ginseng gray mold? Please explain the methods. Ginseng gray mold symptoms: It damages ginseng leaves; the lesions on the leaves are limited by the leaf veins and appear polygonal or irregular. They are light brown, and on the underside of the lesions there is a sparse, thin, grayish-white or pale yellow mold layer, namely the pathogen's sporangiophores and sporangia. In the later stage, the lesion tissue necroses, breaks apart easily...
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