During the flowering period, sweet peppers in the spring sheds often encounter cloudy snow and cold weather, which leads to bad differentiation of flower buds in sheds, resulting in severe flowering and fruit drop, and affecting yield and income. Here are some ways to increase the fruit setting rate of greenhouse sweet peppers: 1. Improve the lighting conditions and increase the temperature When you encounter cold snow and cold weather, you can add additional lights in the shed, and at the same time hang a light curtain on the back wall to increase lighting in the shed. Clean the film and improve the light transmittance of the film. Strengthen pruning and management of pruning, remove too many branches and leaves, especially the inner pruned leaves, improve the light rate of leaves and buds, reduce nutrient consumption, and thus increase the fruit setting rate. 2. Reduce greenhouse humidity, insect pollination Bell pepper in the pollination period of the humidity is more demanding, encounter low temperature even cloudy, shed indoor humidity is too large, easily lead to sweet pepper pollen development, decreased activity, can not be completed normally pollination . Before and after noon, according to the weather conditions, you can let the air cool and dehumidify and reduce the humidity in the shed as much as possible. In addition, the release of bumblebees in sheds can significantly increase the fruit setting rate of sweet peppers. 3. Spraying microelement fertilizer and plant regulator Boron is one of the essential elements of flower bud differentiation of sweet pepper. Boron deficiency often leads to poor flower bud development. For this reason, boron-containing liquid fertilizer is sprayed before flowering, which can supplement the nutrition of the plant and reduce it. Falling flowers and falling fruit. Spraying 30 ~ 40 mg / kg of naphthalene acetic acid solution can also play a very good role in the preservation of fruit.
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