Tomato cracking stems, also known as tomato "roof" stems, the main cause of the disease after the set value of survival, due to high temperature, excessive water control, excessive nitrogen fertilizer inhibited the absorption of calcium, boron, so that the young growth point damage or stem damage caused.
Control measures: rational use of fertilizer, combined application of nitrogen, phosphorus, and potassium fertilizers. Special care must be taken to avoid excessive nitrogen fertilizers. Pay attention to the application of trace elements such as calcium and boron, and find that the soil should be watered in a timely manner, but avoid flooding. When using greenhouses for tomato cultivation, it is best to use old plastic film as a cover for shading and cooling, do not use black shade nets. When a split stem occurs, the lateral branch can be used instead of the main branch.
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