Because blight and stagnation are one of the most common pests and diseases of plants, they all damage the stem base of plants, and the symptoms of plants are similar and difficult to distinguish. Blight and rickets are two major diseases in vegetable seedlings, mainly affecting vegetables such as cucumber, tomato and eggplant. Therefore, the differences between the two diseases and the pesticide control methods are introduced as follows to avoid misjudgment.
First, the difference between the blight and the disease
1, symptoms. The blight seedlings are pulled up, and when it is wet, the mild brown spider silk-like mold can be seen, and the pathogen of the disease is white floc.
2, the condition. The more prominent feature is that standing blight is standing and dying, and the disease is that the seedlings collapse and die. The blight began to produce elliptical irregular dark brown lesions. Later, the lesions expanded, and the stems were wrapped around the stem. The diseased part collapsed and the leaves eventually died.
3, the onset time. The squatting disease usually occurs in the early stage of seedlings, and the seedlings that have just been unearthed have more incidence; the blighting disease occurs later, generally after the emergence of the seedlings after a period of growth.
4, the onset temperature. Folding disease is caused below 15 °C, and blight is not easy to occur at 20-24 °C.
Second, the prevention and treatment of blight and rickets
Because the pathogens caused by these two diseases are different, the pesticides selected in the prevention and treatment are also different. First remove the diseased diseased seedlings, take them out of the field for deep burial or burning, and then spray drugs to prevent and cure.
1, blight disease. 50% inactivated WP 600 times solution, 5% Jinggangmycin water 1000 times solution and 70% methyl thiophanate 1000 times solution, or 50% viscous powder 600 times solution Take control.
2, smashed the disease. 90% Phytophthora WP 500 times solution, or 72.2% Frost blast water 600 times solution, or 72.2% Plex water 600 times solution, or 30% carbaryl water agent 600 times solution, Water spray.
Spray control, choose to do sunny, spray some grass ash after spraying, reduce soil moisture, rational rotation, create an environmental condition that is not conducive to the disease.
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