Symptoms: Tomato rot is also called strip rot. There are two types of tendon rot: one is "brown-type" tendon rot and the other is "white variant" tendon rot. Brown-branch tendon rot mainly appears on the surface of the fruit, which is browned locally, uneven and uneven, and the flesh is stiff. The vascular bundle in the peel becomes brown and necrotic. Usually the lower inflorescences have more fruits than the upper inflorescences. Albino rot occurs mostly in the tissues of the pericarp, and the diseased area has a wax-like luster, which is hard and poorly colored.
Causes: The occurrence of tendon rot is closely related to soil moisture, and the occurrence of soil irritations and soil moisture is more severe. Large amount of fertilizer, especially when the ammonia nitrogen fertilizer is used excessively, affects the absorption of phosphorus and potassium fertilizers, and the incidence is heavier. The use of unfamiliar farmyard manure, dense planting, and forced topping are all very prone to disease. At the same time, the disease has a great relationship with the species.
Control methods: Select varieties that are not susceptible to browning tendon rot. In the cultivation, it is necessary to avoid the phenomenon of insufficient sunlight, multiple fertilizers, and insufficient supply of oxygen in the soil. Increased light, slightly sparsely planted, moderate amount of nitrogen fertilizer, and no phosphorus and potassium fertilizers. The greenhouse in the low-lying ground should pay attention to drainage.
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