Causes and Prevention of Falling and Decreasing of Spring Pepper
2019-06-18 16:30:56
There are many reasons for the falling of the peppers, both physiological and pathological. Pepper is an environment where the air is dry and the soil is humid. If the temperature is high (more than 35 degrees), pollination and fertilization are affected, and the plants are prone to cause leggy, weakening the ability to assimilate the plants, increasing the respiratory burden, causing the ovary to shrivel, and filaments. Dry shrinkage, resulting in falling flowers, or encounter a long time of rainy days, so that lack of light, temperature drops (below 15 degrees), will also affect pollination and pollen tube elongation, resulting in falling.
Droughty soil, lack of moisture, and large amount of air evaporation will also inhibit the plant's demand for fertilizer and water and cause fruit drop and fruit drop. Too much water, poor permeability, so that the roots to hinder the breathing and growth and development, and even roots, can also cause falling flowers. Application of fertilizers requires comprehensive nutrients, requires NPK combined application, excessive or insufficient nitrogen fertilizers, or lack of phosphorus and potassium, so that the application of fertilizers is unbalanced and the supply of various nutrients is inconsistent, causing flowers and fruits to fall due to insufficient nutrients or nutritional disorders. Falling fruit.
Too dense planting leads to poor ventilation, insufficient illumination, reduced photosynthesis, and poor male flower development, making the first and second layer flowers easily fall off. Prevention measures are as follows.
First, implement crop rotation, use resistant varieties, plant healthy and disease-free seedlings, planted broken leaf seedlings without rooting, plant dense trees, improve ventilation conditions, and regulate the microclimate in the fields so that the plants have a good growing environment.
Second, to strengthen the management of temperature and humidity, in the flowering stage should increase the amount of ventilation, the temperature during the day to maintain the shelf temperature of 20-27 degrees, the night temperature of not less than 15 degrees when the day and night ventilation, only good ventilation, plants can grow vigorously, fruit set rate Only high.
Third, strictly control the fertilizer and water, reasonable fertilization, before watering without dressing fertilizer, so as to control vegetative growth, promote reproductive growth, topdressing fertilizer application of phosphorus and potassium, reduce the amount of nitrogen fertilizer, into the flowering period, fruit setting period, rapid fruit enlargement , you need a lot of nitrogen, phosphorus and potassium fertilizers.
Fourth, peppers generally require air humidity of 55% -65%, soil moisture about 15%, such as high 18% will affect the root development and plant growth, such as the field 24 hours of water, but enter the full fruit period should keep the soil moist.
Fifth, the main diseases of pepper are virus disease, anthrax, cotton rot and other diseases. Virus disease can also make plants atrophy, can not branch growth, seriously affecting yield. Virus disease caused by aphids should thoroughly control aphids as soon as possible, destroy them at the stage of spotting, and can be controlled by imidacloprid, dimethoate, and dichlorvos; aphids can be controlled by a moth killer or lime sulfur. Virus disease can be sprayed with virus A, phytosanitary spirit and so on.
Other diseases can be selected and controlled by pharmaceuticals such as Preclosure, Arostenone, Acryloxacin, Acperhyde, Benzothione, Carbendazim, Thiophanate-methyl and other agents.
In addition to the above measures, hormonal treatments such as 2x10-6 2,4-D or (2.5-3)x10-6 dodecyl can also be used to prevent flowering.
Droughty soil, lack of moisture, and large amount of air evaporation will also inhibit the plant's demand for fertilizer and water and cause fruit drop and fruit drop. Too much water, poor permeability, so that the roots to hinder the breathing and growth and development, and even roots, can also cause falling flowers. Application of fertilizers requires comprehensive nutrients, requires NPK combined application, excessive or insufficient nitrogen fertilizers, or lack of phosphorus and potassium, so that the application of fertilizers is unbalanced and the supply of various nutrients is inconsistent, causing flowers and fruits to fall due to insufficient nutrients or nutritional disorders. Falling fruit.
Too dense planting leads to poor ventilation, insufficient illumination, reduced photosynthesis, and poor male flower development, making the first and second layer flowers easily fall off. Prevention measures are as follows.
First, implement crop rotation, use resistant varieties, plant healthy and disease-free seedlings, planted broken leaf seedlings without rooting, plant dense trees, improve ventilation conditions, and regulate the microclimate in the fields so that the plants have a good growing environment.
Second, to strengthen the management of temperature and humidity, in the flowering stage should increase the amount of ventilation, the temperature during the day to maintain the shelf temperature of 20-27 degrees, the night temperature of not less than 15 degrees when the day and night ventilation, only good ventilation, plants can grow vigorously, fruit set rate Only high.
Third, strictly control the fertilizer and water, reasonable fertilization, before watering without dressing fertilizer, so as to control vegetative growth, promote reproductive growth, topdressing fertilizer application of phosphorus and potassium, reduce the amount of nitrogen fertilizer, into the flowering period, fruit setting period, rapid fruit enlargement , you need a lot of nitrogen, phosphorus and potassium fertilizers.
Fourth, peppers generally require air humidity of 55% -65%, soil moisture about 15%, such as high 18% will affect the root development and plant growth, such as the field 24 hours of water, but enter the full fruit period should keep the soil moist.
Fifth, the main diseases of pepper are virus disease, anthrax, cotton rot and other diseases. Virus disease can also make plants atrophy, can not branch growth, seriously affecting yield. Virus disease caused by aphids should thoroughly control aphids as soon as possible, destroy them at the stage of spotting, and can be controlled by imidacloprid, dimethoate, and dichlorvos; aphids can be controlled by a moth killer or lime sulfur. Virus disease can be sprayed with virus A, phytosanitary spirit and so on.
Other diseases can be selected and controlled by pharmaceuticals such as Preclosure, Arostenone, Acryloxacin, Acperhyde, Benzothione, Carbendazim, Thiophanate-methyl and other agents.
In addition to the above measures, hormonal treatments such as 2x10-6 2,4-D or (2.5-3)x10-6 dodecyl can also be used to prevent flowering.
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