Question: Mr. Cai Nongzhou, Dagangtou Village, Xin'an Industrial Zone, Gu'an County, Langfang City, asked: I planted 3 acres of pepper, how to prevent the high temperature period in summer, the three falling phenomenon of pepper?
Zhou Shigang A: The three drops of pepper refer to the phenomenon of falling flowers, fallen leaves and fruit falling during the growth of pepper.
The reasons for the "three falling" of peppers can be divided into the following categories:
First, the temperature is too high: when the temperature is above 34 °C and above, when the surface temperature reaches about 30 °C, the root of the pepper is very easy to cause damage, which can lead to poor pollen development, so that it can not be properly fertilized and the pepper falls and falls.
2. Excessive water: Now it is the rainy season. Every year in July and August is also the time when the rain is frequent in the year. When the water in the pepper field is too much, the soil is deficient in oxygen, causing the vitality of the root system to drop or be damaged. Decreased function can cause the water supply of pepper plants to be too large, causing the flowers to fall, deciduous and fruit drop.
3. Insufficient illumination and excessive air humidity: Since late June, Gu'an has sustained rainfall, long-term rainy and foggy days and excessive planting density of peppers, unreasonable plant spacing, resulting in insufficient light, weak plant growth or air. When the humidity is too high, the pollen absorption is blocked and expanded, and it cannot be scattered from the anther, which affects the quality of pollination and fertilization, and is also prone to the occurrence of “three falling†phenomenon.
4. Improper use of fertilizer: According to the habit of pepper growth, NPK should be applied reasonably. If the excessive application of nitrogen fertilizer, the pepper plants are long, the vegetative growth is too strong, causing poor fruit setting, fruit loss and fruit drop.
5. Pest and disease hazards: Many diseases may occur during the whole growth period of pepper. Among them, anthracnose, scab, white star disease, blight, virus disease, and cotton bollworm, cabbage caterpillar, tobacco budworm, etc. of pepper may cause " The occurrence of the "three falling" phenomenon.
Measures to prevent "three fallings":
Should choose high temperature resistance, low temperature resistance, cold resistance, moisture resistance, disease resistance and other strong resistance varieties; do a reasonable close planting in cultivation, keep the pepper field ventilation and light; reasonable fertilization, the reasonable mix of nitrogen, phosphorus, potassium and trace elements In the spring, the soil in the pepper field is moist. In the rainy season, the water in the pepper field should be removed in time to prevent dryness and wetting; timely control of pests and diseases, conditional response to soil treatment with carbendazim in the pepper field, and rotation with other crops to prevent pepper The occurrence of "three falls".
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