1, incomplete fertilization, sweet pepper pollen germination of the optimum temperature of 20 ~ 30 °C, above this temperature, the pollen germination rate decreased, easy to produce untrue. When the temperature is lower than 13°C, normal fertilization cannot be performed, and fertilization is unfavorable, and falling, falling fruit, parthenocarpy, and deformed fruit are liable to occur.
2, poor light, lack of fertilizer and water, fruit nutrition is less or uneven, but also prone to malformation.
3. The enlargement of pepper fruit is firstly longitudinally elongated and then laterally elongated. When the root system is not well developed or damaged, or the soil becomes dry and water is scarce, or if the soil solution concentration is too high, the water absorption of the root system will be affected. A short diameter is formed; if the night temperature is too low, it is easy to form a pointed tip.
4. When a fruit that has grown to a certain degree has undergone severe drought, the fruit will lose its luster, and the fruit under the sun will turn into a dull-colored, dull fruit, which is likely to occur when the greenhouse enters a hot season.
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