1. Soft rotSymptoms: The plant is still upright, but it is dead. After cutting the stem, you will find a yellow-white sticky substance inside, which emits a foul odor. The diseased part becomes soft and rotten. The source of infection may be insects or soil, so attention should be paid to both aspects. Treatment: In terms of prevention, first disinfect the soil, expose it to sunlight and then plant. You should also add carbendazim powder to ensure that the germs can be removed. 2. Fusarium wiltSymptoms: A large number of toxins and pathogens appear inside the upright part, blocking the transmission of water and nutrients, causing weak root growth. The plant will also lack water and nutrients, eventually drying up and dying. It usually enters through wounds and spreads through soil infection. Treatment: Treat and disinfect the loam before planting, and replace it with new soil if you find it infected with the disease. 3. Leaf spotSymptoms: Small black spots will appear on the branches at first, and then the spots will gradually expand, causing the entire plant to turn into black spots. Treatment: Cut off the dry parts to prevent further infection, and spray the pesticide thiophanate-methyl. |
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