Question: Mr. Cai Nongzhou, Dagangtou Village, Xinxing Industrial Area, Gu'an County, Langfang City asked: I plant 3 acres of big peppers. How can I prevent the phenomenon of pepper falling three times during summer heat?

Zhou Shigang: Three peppers are the phenomenon of falling, falling leaves, and fruit drop during the growth of peppers.

Causes of pepper "three down" can be divided into the following categories:

First, the temperature is too high: when the temperature is 34 °C and above, when the surface temperature reaches 30 °C, the root system of pepper can easily cause damage, which can lead to poor pollen development, so that can not be normal fertilization and cause the peppers to fall, fruit drop.

Second, excessive water: Now is the rain season, each year in July and August is also the time of frequent rain during the year, when the moisture in the pepper field is too much, the lack of oxygen in the soil leads to root vitality decreased or damaged, to the absorption Decrease in function may cause the pepper plant to have a large water supply, causing the pepper to fall, defoliate, and drop fruit.

3. Inadequate light and excessive air humidity: Since late June, Gu'an has experienced continuous rainfall, long-term overcast rain, foggy days and excessive planting density of peppers, unreasonable plant spacing, insufficient light, and weak plant growth or air. When the humidity is too high, the pollen absorption is blocked and expanded, and it cannot be dissipated from the anther, affecting the quality of pollination and fertilization, but also easily causing the phenomenon of “three falls”.

IV. Improper use of chemical fertilizers: According to the habit of pepper growth, N, P and K should be applied reasonably. If too many nitrogenous fertilizers are applied, the pepper plants are long and the nutrition growth is too prosperous, resulting in poor fruit setting and falling fruit.

V. Pests and diseases: Many diseases may occur in the whole growing period of peppers. Among them, the anthracnose, scab, scab, wilt, virus disease, and damages of cotton bollworm, cabbage caterpillar, and tobacco budworm may all cause " "Three falls" phenomenon.

Measures to prevent "three falls":

Should choose high-temperature resistant, low-temperature resistant, cold-resistant, moisture-resistant, disease-resistant and other varieties with strong resistance; in the cultivation, it should be planted in a reasonable way to maintain the light and light in the pepper field; reasonable fertilization, reasonable matching of NPK and trace elements In the spring season, the soil in the pepper fields will be moistened, and the water in the pepper fields will be eliminated in the rainy season to prevent it from drying out. The pests and diseases shall be prevented and treated in a timely manner, and the soil in the pepper fields shall be treated with carbendazim in a conditional manner; The "three falls" occurred.

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