Eggplant is a common vegetable in our life, but there are some plant It is found that purple eggplant turns into white eggplant, which seriously affects the appearance quality of eggplant, reduces the commodity value and seriously affects the income of farmers. So what is the cause of eggplant whitening? How to prevent it? Let's understand.
1. Temperature reason
When the temperature in the greenhouse is too low, especially in the second half of the night, the conversion of lycopene in eggplant will be hindered. Therefore, it is difficult to color eggplant and gradually turn white. When the vegetables in eggplant are around 24, the formation effect of lycopene is better. In the coloring period, the temperature is not suitable, and it is easy to appear the phenomenon of eggplant turning white.
Prevention and control method: to adjust the temperature, and spray new high fat film to form a layer of polymer film, not only heat preservation and moisture preservation, but also to prevent bacteria. In the result period, the temperature of continuous cropping in the daytime is between 25-30 degrees, and the temperature at night is about 16-20 degrees.
2. Illumination reason
Eggplant is a light loving crop. Lack of light will lead to weak plant growth, reduced yield, difficult to form pigment, dark fruit color, but also easy to produce other variegated colors, especially purple eggplant is not easy to color, which directly affects the commodity value. In addition, under weak light conditions, if malnutrition is encountered again, it will aggravate the occurrence of poor coloring fruit.
Control method: under the premise of adjusting the temperature, properly remove the old leaves in the lower part of the plant, wipe the plastic film, and spray the photosynthetic nutrient film fertilizer, which can help the crops to absorb light, fertilizer and water for plant growth and development to the limit.
3. Partial application of nitrogen fertilizer
Excessive application of nitrogen fertilizer, excessive vegetative growth and excessive branches and leaves will lead to unsuitable coloring of fruits. Excessive application of nitrogen fertilizer, especially in the late growth stage, makes the vegetative growth of plants stronger than reproductive growth, so that the leaves squeeze and cover each other, which affects the fruit maturity and leads to poor coloring.
Control method: in the late growth stage of eggplant, the application of nitrogen fertilizer should be controlled as much as possible. If the growth of eggplant is not good, some new high fat film and foliar fertilizer can be sprayed to solve the problem. If the phenomenon of vigorous growth occurs, it is necessary to spray "cuhuawang 3" in time to force the vigorous nutrition of the top tip to return to a large amount, and the inertia advantage of washing shoots rapidly weakens to the trend of capping. The main nutrition should be transferred to the development of young fruit, so as to improve the fruit expansion vigor, avoid leaf hypertrophy and improve the field permeability.
The above is the eggplant whitening reasons and prevention methods, hope to help you, want to know more about related knowledge, please pay attention to our encyclopedia Planting net 。