Causes of tomato flower face disease and prevention methods
Many tomatoes grown by the growers have a sick face. Although they look good, they taste very bad. This kind of tomato can't be sold at all. So how does tomato face disease form and how do we prevent tomato flower face disease? Let's take a look at Hui Nongwang Xiaolin!
First, what is tomato flower face disease?
Tomato flower face disease means that the fruit of tomato is poorly colored. The red tomato fruit produces yellow plaques from the fruit shoulders, and some of the yellow spots extend to the top of the fruit, which is flower-like. There are also yellow-green plaques, and some have green stripes on the surface, and brown ribs inside the fruit.
Second, the cause of tomato flower face disease
Generally, they are related to varieties. Some varieties have more flowers and face, and some have fewer varieties.
Second, it is related to nutrient supply. It is easy to occur when there is high nitrogen, insufficient phosphorus or potassium deficiency. When the vegetative growth of the tomato is too high, the chlorophyll content will increase, thereby inhibiting the formation of lycopene, resulting in a large amount of yellow spots on the tomato fruit.
In another case, boron deficiency and potassium deficiency cause the nutrient transport to be blocked, and the fruit is necrotic brown due to lack of nutrition.
There is also a tomato that enters the middle and late growth stages, and premature aging occurs, resulting in the immature tomato fruit in the process of reddening, the amount of lycopene produced is low, resulting in a large number of yellow spots or green streaks.
Third, it is related to temperature. If the fruit surface temperature is lower than 8 °C or higher than 32 °C, it is not conducive to the formation of lycopene, resulting in brown or green residue on the peel. The night temperature is too high, and the high respiratory intensity is not conducive to the accumulation of nutrients, resulting in poor fruit development.
Fourth, the light, excessive or too weak water affects the color change of the fruit. When the soil is dry early and the plant transpiration is large, the roots supply nutrients and water deficiency are difficult to change color.
Third, how to prevent tomato flower face disease
1, pay attention to choose excellent varieties
2. The base fertilizer must be mainly organic fertilizer, and 15m3 of chicken manure or duck manure should be applied per acre. The tomato seedlings should be applied with biological bacteria to promote the roots to cultivate strong plants. When the fruit grows to the size of the mung bean grain, spray 1500 times of polyboron calcium and 800 times of calcium and magnesium fertilizer, and enter the fruit expansion period to apply ternary compound fertilizer with 8~10kg per acre to promote fruit and fruit to prevent flower face.
3, fruit development period, from day 25-30 ° C, night 13-17 ° C. Note that the leaves above the fruit are kept shaded. Watering to see dryness and moisture, to prevent roots and roots.
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