How to prevent sweet pepper flower drop? Detailed summer control methods
How to prevent sweet pepper flower drop in summer? Please explain the methods. Sweet pepper flower drop in summer is mainly caused by the following factors: 1. Temperature reasons. If the temperature is too high (above 35°C), incomplete flower organ development or dried-up stigmas can lead to poor pollination and fertilization, causing flower and fruit drop. In addition, high night temperatures in summer make plants prone to excessive vegetative growth,...
How to prevent sweet pepper flower drop in summer? Please explain the methods
Sweet pepper flower drop in summer is mainly caused by the following factors:
1. Temperature reasons. If the temperature is too high (above 35°C), incomplete flower organ development or dried-up stigmas can lead to poor pollination and fertilization, causing flower and fruit drop. In addition, high night temperatures in summer make plants prone to excessive vegetative growth, and excessive vegetative growth can cause flower and fruit drop. During the day, methods such as splashing mud slurry can be used to lower the temperature inside the greenhouse, and at night, large vents can be opened to lower the night temperature. For temperature control during the flowering period, 20-27°C during the day and 15-20°C at night are suitable.
2. Nutritional reasons. Sweet pepper growth requires sufficient photosynthetic products and fertilizer and water. Dry soil and insufficient water will inhibit the plant's absorption of fertilizer and water, causing flower and fruit drop. Excessive water, however, worsens soil permeability, hindering root respiration and growth and development, and can even cause root rot, also leading to flower and fruit drop. Keeping the soil alternately dry and moist is best. In addition, fertilizer application should provide comprehensive nutrients and be applied with a combination of nitrogen, phosphorus, and potassium. Too much or too little nitrogen fertilizer, or a lack of phosphorus and potassium, can cause flower and fruit drop due to insufficient nutrients or nutritional imbalance. In particular, it should be noted that after sweet peppers enter the fruiting stage, potassium demand rises rapidly, about twice that of nitrogen, so potassium fertilizer must be emphasized during the fruiting stage.
3. Reasons of disease and pest damage and pesticide damage. Viral disease is the number one killer of overwintering sweet peppers. After infection with viral disease, plants often become stunted or have dead growing tips, causing flower and fruit drop. To address this situation, the insect sources that transmit the viral disease should first be eliminated, and imidacloprid, Yibianjing, etc. can be used for control, or spraying with Virus A, Ningnanmycin, etc. can also be combined. In addition, because summer temperatures are high, the concentration of pesticides used should be correspondingly lower to avoid pesticide damage.
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