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What are the reasons for the "three falls" of peppers? How to solve?
"Three falls," that is falling flowers, falling fruit, fallen leaves. A few days ago, many vegetable farmers in Qingzhou called and said, “The recent drop in greenhouses is very serious, and hope the teachers of the “Northern Vegetable News†can come over and give instructions.†On March 18, the reporter rushed to Qingzhou. In Gujia Village of Dongxia Town, the most serious phenomenon of peppers, Gu Baofa first said: “The peppers of the family’s peppers are growing well in the early period, uniform in thickness, and normal in the intersegment, but they have been exposed to rain for a few days. The phenomenon of fallen flowers and fallen leaves is still unclear. Now, according to the growing trend of the peppers and the weather, the village’s Liu Xintang analyzed: “I think this is the growth and flowering of the stems and leaves of the pepper, and the result is a conflict between the two. Even under the rainy weather, the lack of light, the plants are obviously long, causing falling, fruit drop." Reporter said: This analysis makes sense. Everyone knows that Wang has no fruit. Plants consume a lot of nutrients, which reduces the nutrient supply of flowers and fruits, and it causes flowers to fall. Next, the reporter gave a solution. The solution to the emergence of plant crops is: one is sitting on a pepper, and the other is picking in the evening; the fruit is pressed on the crown to control the leggy; two, 200 mg/kg of Chlormequat can be used for foliar spraying, spraying 1-2 times, controlling the leggy Increase stem diameter. For those who have already experienced the problem of “three falls,†it is recommended that naphthalene acetic acid be sprayed at 30 mg/kg to prevent further development and to promote the transition from vegetative growth to reproductive growth. "But using pharmacy control is always a temporary solution. If we want to prevent "three downs," we must consider comprehensively and strengthen management." Liu Dequan, a planting expert in the village, very much agrees with the reporter's point of view. He said: "I am through comprehensive management. Avoid the occurrence of 'three falls'." The first is to control the temperature. For example, the temperature required for the flowering period of peppers should be 25-32°C during the day. If the temperature exceeds 35°C, the temperature should be reduced. Otherwise, the high-temperature obstacles affect its pollination and fertilization, which is the main reason for falling flowers. The nighttime temperature should be maintained at 18-20 °C, the temperature difference between day and night is too small, most of the photosynthetic products are used for their own respiratory consumption, the fruits get less nutrition accumulation, and the falling and fruiting are easy to occur. Followed by good management of fertilizer and water. The root system of capsicum is underdeveloped, the amount of roots is small, the soil is shallow, and the regenerative ability of the root system is weak. It is not easy to root, but it is wet but impatient. This feature determines that watering should be done with little water. At the same time, the peppers are hi-fat and not fat-tolerant. In production, organic fertilizers and chemical fertilizers must be used in conjunction with the application of trace elements such as boron and zinc. Again, early disease prevention and control. If the leaf is infected with anthrax, it is prone to defoliation. It can be controlled by spraying 25% prochloraz 1000 times solution or 80% anthraquinone formamide 800 times or azoxystrobin mixed with difenoconazole 1500 times.