How should tomato colouring not even do?

Tomato in the transition period management negligence, directly affect the tomato color.

So, what factors can cause tomatoes to turn uneven color?

01. The temperature is too high or too low

The color of tomatoes depends on the lycopene in the fruit.Practice has proved that lycopene is easy to form when the temperature is 23-28℃, which promotes the fruit to turn color.If the temperature drops below 13℃ or above 32℃, lycopene production is blocked.

02, the use of fertilizer is not reasonable

When nitrogen, phosphorous, potassium scale is maladjusted, especially when turn color period nitrogen high potassium is low will affect the formation of solanthin, lead to turn color is not uniform, the tendon that often appears on tomato rot fruit, green skin fruit, tawberry fruit and so on is caused by unreasonable fertilizer.Potassium fertilizer can promote fruit expansion and improve fruit color. Therefore, there is a large amount of potassium fertilizer applied in the fruiting stage, and it takes a process for potassium fertilizer to be absorbed and utilized by vegetables after it is applied into the soil. Therefore, potassium fertilizer should be used before fruit expansion, and water soluble fertilizer with high potassium once every half a month can promote fruit expansion and color transformation.Application of potash fertilizer before the fruit turned red was ineffective.At the same time adhere to the foliar spray containing calcium, magnesium foliar fertilizer, so that the color even.

03, too many thin leaves

Sparse leaves should be paid attention to, be sure to retain the right amount of leaves.In the stage of transchromatization, the diseased leaves and the old leaves at the bottom of the plant, the yellow leaves and the leaves around the fruit that block the light should be removed. Other leaves should not be removed as far as possible.The roots are raised on leaves, with too few leaves and too few photosynthetic accumulated nutrients. In this case, the root system is prone to premature aging, and its ability to absorb nutrients is greatly weakened, thus affecting the yield and quality of fruits.For the last batch of tomatoes in the transchromative stage, it is necessary to keep at least 4-6 leaves. It is not correct for some vegetable farmers to leave only a few parietal leaves.

04, fruit disease prevention should be timely

For example, tendon rot, stripe virus disease can lead to poor staining of tomatoes.These two diseases have a lot to do with proper management and should be combined with management measures for comprehensive immunization.In order to promote tomato color, many vegetable farmers excessively increase the temperature of the shed.It's not very scientific.High temperature will inhibit the production of lycopene, affecting the normal coloring of tomatoes. 

Tomato hualian fruit can be divided into the following several cases: chapped fruit, tawny fruit, tendon rot fruit, cork fruit, virus fruit, canker fruit and so on.Different situations have different causes and different preventive measures.

Chapped fruit: the fruit enters the ripening stage and appears at the shoulder or navel

The projective chaps are called chaps.The most important reason for chapped skin is improper control of temperature and humidity, and the secondary reason is improper leaf picking.For example, in the period of green fruit or white ripeness, high temperature and drought in the shed, low humidity, leading to dry peel will appear crack;The dew on the peel surface was quickly evaporated by sudden wind, and then tiny chaps were formed on the peel surface.

The prevention of tawny fruit should be started from the following two aspects. Firstly, balanced fertilization is recommended. During the leavening period of tomato, it is recommended to apply the full-water-soluble fertilizer with high absorption and utilization rate (acacia 20-20-20+TE or acacia 15-6-35+TE).Secondly, reasonable temperature control. In the management process of the shed, it is recommended to air out when the shed temperature exceeds 25℃, and try to keep the shed temperature below 28℃.

Tendon rotten fruit: tomatoes into the mature stage, in the fruit shoulder always appear a piece of green spots, with a knife cut open the peel, can find the skin vascular bundles brown, we call it tendon rotten fruit.In the case of excessive nitrogen fertilizer, insufficient potash fertilizer and excessive watering, tendon rot fruit is easy to occur.

The key to prevent sinew rot is proper watering, balanced fertilization, avoid soil moisture too much, high nitrogen and low potassium.It is impossible to make the fruit become normal in the plant which has been damaged by the sinew. It is recommended to spray the young fruit with potassium dihydrogen phosphate (nutritaphosphorus potassium) in time, and at the same time flush with high potassium (aike 15-6-35+TE) water-soluble fertilizer. After watering, pay attention to timely weeded to maintain good permeability of the soil.

Corknut: when the plant is short of boron, the fruit surface is prone to corknut brown streakings, which do not expand or rot, and the fruit is hardened. It often happens near the fruit pedicle.Prevention is simple: apply boron containing amino acid foliar fertilizer (root bovine amino acid water soluble fertilizer) regularly before and after flowering.

Virus fruit: tomato fruit surface appeared semicircular ring markings, leading to the fruit face, and the situation in the shed sporadic occurrence, can be judged as a virus disease.In recent years, hualian fruits caused by viral diseases have occurred from time to time, which is related to the resistance of varieties.

In order to prevent the appearance of virus diseases, it is suggested to spray the related insecticides of virus diseases on a regular basis, at the same time, cooperate with thiamethoxam, imidacloprid and other insecticides to eliminate the virus-spreading pests.

Canker fruit: tomato canker disease can form white near circular disease spot on the fruit surface, the center of the disease spot has brown small point, looks like a bird's eye, this is a typical disease of canker disease.