Consultation: May I ask experts, the cauliflower seedlings I planted now have two leaves, one of which is falling down. I dialed it down and found that the roots were thin. We call it Heigen. I do not know what kind of medicine can be used to treat it?
Answer: From your description of the symptoms, it should be cauliflower black root disease. The pathogen that causes this disease is Rhizoctonia solani. The pathogens mainly invade the rhizomes of the seedlings, causing the diseased parts to darken or contract. When wet, white moldy material can be produced and it will appear after a few days. The plant died. The main pathogens are hyphae or sclerotia in the soil, or wintering with the diseased bodies. The fields mainly rely on infections. In addition, seeds, farm implements, and sick fertilizers can also be transmitted. The recent temperature fluctuations, the late release after emergence, soil moisture is easy to produce diseases. Control measures: 75% chlorothalonil WP may be used as 600 times solution, or 60% more. Wet WP may be 500 times or 20% CK may be sprayed as 1200 times. Since the waxy layer of cauliflower leaves is thick, it is best to add some spreading agent in the liquid during spraying, such as: soft water pass. If no spreading agent can add a small amount of detergent.
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