The difference between sudden collapse disease and blight disease

There are many differences between sudden collapse disease and blight disease, including different pathogens, different types of damage, different time of onset, different symptoms, and different methods of prevention and treatment. The quenching disease often occurs after the seedlings are unearthed and before the true leaves are unfolded. The suitable ground humidity for the disease is 10 ℃, and the seedlings usually die from collapse. Blight often occurs in the middle and later stages of seedling breeding, often in the heat and high temperature, and usually dies standing up.

1. Different pathogens

The pathogens of the disease are Pythium, Phytophthora, Rhizoctonia and other fungi. The pathogen of Rhizoctonia solani is Rhizoctonia solani.

2. Different kinds of damage

In addition to capsicum Solanaceae vegetables, melons, lettuce, celery, cabbage, cabbage, radish, onion and other vegetable seedlings can be damaged. In addition to Solanaceae and melons, some leguminous and cruciferous vegetables can also be killed.

3. the time of onset is different.

Quenching disease often occurs after the seedlings are unearthed and before the true leaves are unfolded, and the suitable ground humidity for the disease is 10 ℃. Rhizoctonia solani mostly occurs in the middle and late stages of seedling breeding, and often occurs under the condition of extreme heat and high temperature.

4. the symptoms are different.

Most of the seedlings felt sudden falling disease from the base of the stem, and waterlogged dark spots appeared at the base of the young stem after infection, then expanded around the stem and gradually constricted into a thin line, which made the aboveground parts of the seedlings inverted due to the loss of support. Rhizoctonia solani mainly harms the stem base or underground root of seedlings. At the initial stage of infection, the disease spot is oval or irregular dark brown, the disease part gradually sinks and overflows, and some gradually become dark brown. When the disease spot expands around the stem for a week, it finally dries up and dies.

5. Different prevention and control methods.

Before or at the initial stage of the onset of cataplexy, spray with 72.2% Pulicol water agent 400 times, 2 spray solution 2 kg per meter, and copper ammonium preparation 400 times. At the initial stage of the onset of the disease, 38% cuproloxil 800-fold solution or 41% poly-pyrimidine 600-fold solution can be sprayed for prevention and control.