The fact that pepper falls and flowers are not a fruit during the cultivation of peppers, farmers will encounter a phenomenon, the loss is serious, we must strengthen the prevention and control of this phenomenon. Let's take a look at what causes it, how to prevent it?
What is the reason why pepper falls without fruit?
1. Fertilization is unreasonable
Because most of the fertilizers used have high nitrogen content, the nitrogen fertilizer is excessive, the phosphorus and potassium elements are relatively low, and the mobility of phosphorus in the soil is very small, resulting in relatively insufficient phosphorus and potassium elements. The soil trace elements are not obtained after consumption. Timely replenishment, causing the plants to be too prosperous and prolonged, and the flower development is not normal and causes the flowers to fall.
2, watering too large, too much
Some vegetable farmers mistakenly believe that as long as more watering and fertilizing plants will grow faster, the yield will certainly increase. Therefore, the amount of watering and watering is increased, the water in the soil is severe, the water required by the roots is not coordinated, and the nutrient is preferentially supplied. The growth of vegetative organs such as stems and leaves, weak reproductive growth, and poor flower bud differentiation cause falling flowers. Therefore, it is necessary to water the water according to the sensation, and must not flood the water. Watering depends on the sky, the land, and the growth of vegetables. That is to say, watering should be chosen in the sunny morning, do not choose to water before the cold current and cloudy days, even cloudy days. Look at the humidity of the soil, as long as the soil moisture is above 70%, it will not be watered for the time being. Look at the growth and appearance of the dish. It is best not to water the water before and after a large amount of flowering. After the flower has been thanked, the fruit has been stabilized and then watered. After watering, it should be ventilated in time to reduce the humidity in the shed and prevent disease.
3, high night temperature, small temperature difference between day and night
Peppers are warm, but not resistant to low temperatures and high temperatures. During the flowering period, the daytime temperature suitable for growth is 20-27 °C, and the night temperature is 13-18 °C. If the temperature is too high or too low, it will cause the flower to develop abnormally or it is difficult to pollinate and fertilize. When the temperature is higher than 35 °C during the daytime, the flower is not fully developed or the stigma is dry. It cannot be pollinated and fertilized to cause falling flowers; if the night temperature is too high, it will lead to excessive vegetative growth and inhibit reproductive growth.
4, insufficient light
Plants are shaded or not covered with shed film or covered with old film. When encountering alternating cold and warm air flow, cloudy days, insufficient light, wind and dust, and some vegetable farmers open the grass cover in the evening to make the shed light Insufficient results in reduced photosynthetic efficiency and less product accumulation causing falling flowers.
5, hormone poisoning
When the temperature rises, the concentration of the growth regulator used in the flower should be appropriately reduced, and should not be used according to the concentration at low temperature. Otherwise, hormone poisoning may occur, and the flower can not be normally developed and pollinated to cause falling flowers.
6, disease, phytotoxicity, fertilizer damage
The humidity in the shed is large, which will create favorable conditions for many diseases such as gray mold and cause falling flowers and fruit; if the concentration of pesticide or liquid is too large, the plant will have phytotoxicity, and the concentration of disposable fertilization will be too large, and the soil solution will rise. The osmotic pressure increases, causing the root system to be injured, and the plant weakness can also cause falling flowers.
What should I do if the pepper falls?
1. Timely fertilization
According to the growth of pepper, the formula is rationally fertilized, the reasonable fertilizer is selected according to the formula, the various nutrient supply is balanced, and the balance of vegetative growth and reproductive growth is coordinated. For vegetables with excessive growth of stems and leaves, the amount of topdressing can be appropriately reduced, especially the amount of nitrogen fertilizer should be controlled. Before the peppers are hanged, as long as they are not seriously deficient, they should be applied as little or as little as possible.
2, moderate ventilation, light transmission
The greenhouse should be uncovered early to cover the straw curtains, and the ventilation should be timely ventilated according to the temperature requirements of the peppers. In addition, farmers who grow eggplant, tomato, kidney beans, etc. should also be ventilated and ventilated in time. For example, vegetables such as eggplant and tomato should be ventilated when the temperature reaches 30 °C or above, and the temperature in the shed should be 25 to 30 °C during the day and 15 to 16 during the night. °C. Beans and vegetables are ventilated at 28 ° C, maintaining a shed temperature of 22 to 25 ° C during the day and 12 to 14 ° C during the night. Under the premise of ensuring the temperature of the shed, cover the straw curtain early and extend the light transmission time as much as possible. On cloudy days, the straw curtain should be opened as much as possible. The shed film is often cleaned and wiped to ensure good light transmittance and improve photosynthetic efficiency.
3, auxin regulation
It can be sprayed with 15~25mg/kg of naphthaleneacetic acid and 750 times of auxin, which can control the growth of flower buds and promote the transformation of vegetative growth to reproductive growth and prevent falling flowers and fruits. However, it should be noted that temperature regulation cannot be ignored. If the temperature is not properly controlled, the fruit will continue to occur.
In addition, it is necessary to strengthen the prevention and treatment of diseases such as gray mold and anthrax.
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