The deciduous flower of the pepper is an extremely common symptom in the whole growth process, which has a great and bad influence on the growth of the pepper, which greatly reduces the yield of the pepper and affects the income of the vegetable farmers.
We can take the method of preventing and adding pesticides and bactericides in advance to prevent and control the falling and falling of the peppers. See below for details:
1. Adopt comprehensive agricultural control measures to strengthen cultivation management
1 Carry out the rotation, and rotate with the non-solanth crop for 2-3 years, remove the sick body in time, and burn it or bury it deeply. It can be used to disinfect the soil and kill harmful bacteria by using carbendazim and nail cream.
2 Protect the root system with nutrient seedlings, mulching film, etc., reduce the incidence of pathogens, and carry out deep sorghum or narrow sorghum cultivation to prevent waterlogging in the field, so that the soil has good gas permeability and create a good environment for plant growth. In addition, in order to improve the disease resistance of pepper, it is necessary to cultivate strong seedlings in cultivation, rational close planting, rational application of nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, especially nitrogen fertilizer can not be too much or too little, and control the amount of watering and control The watering period and so on.
3 Use varieties with strong disease resistance and stress resistance and carry out seed treatment. Soak the seeds with warm water for 10 minutes before sowing, rinse them with cold water in time, and then dry them and sow them. It can also be soaked in 10% trisodium phosphate solution for 20-30 minutes, then washed and germinated. In addition, it can be soaked in 1% copper sulfate solution for 5 minutes, removed and washed in 1% soapy water and then germinated.
2. Chemical control
Chemical control is important in early prevention. Spray 1:1:200 Bordeaux mixture or 0.3% copper sulfate solution 2-3 times before and after the buds to protect. It has been observed that the field where the Bordeaux mixture is sprayed is rarely or very light.
According to the law of disease occurrence and weather conditions, before the onset or at the beginning of the disease, for the disease that often occurs in previous years, choose Capsicum virus WP 500 times or 2% amino oligosaccharide 1500 times, depending on the severity of the disease every 5 - Spray once a day for 7 times, even spray 3-4 times, while paying attention to controlling aphids. In the flowering and fruiting period, it can be sprayed with 70% methyl thiophanate WP 500 times or 56% chlorfenapyr 1200 times solution, spray once every 7-10 days, a total of 2-3 times. In production, several diseases often occur at the same time, so it is best to rotate several kinds of drugs, which can generally control the occurrence of several diseases.
3. If the temperature is too low or too high, the flowers and fruit may be sprayed with 3ppm-4ppm tomato spirit solution during flowering to avoid falling flowers and fruits.
Pepper has fallen leaves and fallen flowers throughout the growth period. Especially after planting, defoliation and falling flowers are one of the important reasons for the reduction of pepper production. Therefore, we must pay attention to this problem and actively take preventive measures.
More pesticide knowledge , please pay attention to China Pesticide Network
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