Symptoms Identification of rotted rot fruit commonly known as "black ribs", there are obviously two types: brown rot-type rot fruit and white deformed tendons rot fruit, brown rot-type rot is the most common fruit. Browning type rot nut decay fruit: The young fruit period begins to occur, mostly occurs in the lower part of the plant. In the fruit enlargement period, the fruit surface is unevenly colored, and then local browning occurs. The fruit is cut and the vascular bundle in the peel is seen as dark brown. Or dark brown. In lighter diseased fruits, part of the vascular bundle became brown and necrotic, and the fruit shape did not change, but the vascular bundle browning site did not turn red; the heavier diseased fruit, the vascular bundle of the whole fruit was dark brown, and the fruit surface was uneven, unbearable. White deformed rot fruit: Green pods to the red period occur, the fruit coloring is poor, the red part of the fruit is reduced from the outside, the diseased part has a waxy luster, the fruit is cut, and the flesh is seen as "cockroach-hearted". Some appear white or brown tendons. Disease fruit hardened and poor quality. The tendon rot disease generally occurs only on fruits, and stems and leaves do not show obvious symptoms. In severe cases, sometimes the top and bottom leaves of the plant are curved, and the ribs protrude. Cutting the stems 70 cm away from the roots of the plants revealed brown lesions in the culms of the stems.

The etiology of tomato rot is a very complex cause of rot. The preliminary analysis suggests that the carbohydrate deficiency and carbon/nitrogen ratio of tomato plants are reduced, causing metabolic disorders, resulting in vascular beam lignification as the direct cause of the disease, and many adverse environmental conditions, such as insufficient light, Low temperature and humidity, lack of air circulation, lack of carbon dioxide, high night temperatures, low ground temperature, and excessive soil moisture all contribute to insufficient carbohydrates in the plants. Partial application, over-application of nitrogen fertilizer, especially when excess ammonia nitrogen, potassium deficiency, boron deficiency and other trace elements will also make the ratio of carbohydrate and nitrogen in the plant decreased. In addition, excessive irrigation, soil moisture, poor permeability, will prevent the root system of tomato plants to absorb nutrients, resulting in the loss of plant nutrient balance, hinder the absorption and transfer of iron, but also the cause of brown rot corruption. For example, in 2005, several greenhouses in Tieling Village, Mucheng District, due to low altitude and close to the river, the drainage in the greenhouse was not good, the soil was heavy, and the plants could not absorb nutrients, resulting in browning of young tomatoes; in autumn 2006, Lixin Village Due to too dense planting and too many fruits, the fruits competed with each other for nutrients, some of the tomato fruits were unevenly colored, and the empty flesh of the fruit became brown. The etiology of white rot and rot fruit has a certain relationship with the above, but it is mainly due to toxins produced by the tobacco mosaic virus infection.

Yoga and Fittness

Massage Ball,Yoga Roller Stick,Massage Relax Bar,Yoga Massage Ball

Ningbo Prestigeplus Commodity Co.,Ltd , https://www.prestigemedics.com