The selection of varieties with strong resistance to diseases and pests in agricultural control is an economic and effective measure to prevent and control diseases and insect pests, such as Fortunella incense; use of high-quality virus-free seedlings; 2-3 years of rational crop rotation or rice rotation; timely removal, burning or deep Buried diseased, diseased and diseased fruits and field weeds. In the autumn, before the field is planted, the soil is deeply ploughed and sterilized by solar heat and ultraviolet rays; additional fully decomposed organic fertilizer is added; the spring nursery field should be ploughed 40 cm deep after the harvest of the previous crop, and natural soil temperature should be used to kill part of the soil-borne pathogens and nematodes. Wait.
Physical control yellow traps kill whitefly and aphids. First apply 1 coat of oil to the yellow plate, hung 30 to 40 pieces of 100 centimeters and 20 centimeters of yellow plate per 667 square meters (1 acre). When the board is covered with whitefly and aphids, apply 1 coat of oil.
Biological control mainly uses biological pesticides to control pests and diseases. The control of gray mold and powdery mildew can be achieved with Yitiande (1000/100g Bacillus subtilis wettable powder) with 50-75g per 667m2 (best effect at the initial stage of disease or before the onset of disease) during budding stage and flowering. Each time during the spray. Control of red spiders can be used 1.8% avermectin 20 ml per 667 square meters, 30 kg of water spray, banned 2 weeks before fruit picking. In the protected area, it can be generally used as the key prevention and control period after the beginning of thermal insulation.
During the fruiting period of ecological control, the amount of ventilation was increased and the relative humidity within the shed was reduced to 50% or less. The temperature of the greenhouse was increased to 35°C per day for 2 hours, and then the air was allowed to cool down and 2 to 3 times of continuous boring was performed; it could prevent gray mold. Appropriate irrigation to prevent excessive drying of the soil can avoid or reduce the occurrence of leafhoppers. Avoid excessive application of nitrogen fertilizer to prevent excessive lush vegetation, in order to reduce the incidence of diseases such as gray mold.
Chemical control The use of high-toxicity and high-residue pesticides is prohibited in the production of pollution-free strawberries, and the use of biogenic pesticides is advocated. The smoke protection method and the dust method are preferentially adopted in the protected areas, and spray prevention and control can be performed in dry and sunny weather. The fruits should be sprayed after the fruits are harvested and used strictly according to the safety interval. Precautions: In the sheds where conditional use of bees assist pollination, 10 to 15 days before the beehive is moved into the shed, complete prevention and control of pests and diseases, especially insect pests, should be carried out. Generally, pesticides cannot be used after the beehive is moved in, and insecticides are especially prohibited.
Author: Luancheng County Agricultural Technology Promotion Center
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