Seedbed preparation. Choose fields with loose soil, easy drainage and irrigation, and no water accumulation as seedbeds. Continuous cropping is not allowed. Use Mianlong fumigation soil method or lime nitrogen solar high temperature disinfection method to disinfect the soil. During high-temperature seasons, prepare and turn the soil, and evenly spread 20 to 30 grams of 98% Mianlong microgranules per square meter, or evenly spread 70 to 100 kilograms of lime nitrogen per acre, then rake the soil and water it to keep the soil moisture at about 60%. , cover with plastic film and seal for more than 15 days, remove the film and wait for use after 7 days. The seedbed is plowed in winter, and then deeply plowed 15 to 20 days before the mother plant is planted, and then exposed to the sun for 3 to 5 days. Spread 200 kilograms of decomposed cake fertilizer or 1,000 kilograms of organic fertilizer per acre. After fertilizing, plow the land to make a border 1.5 to 2 meters wide, with a furrow 20 centimeters deep and the border surface leveled.
Mother plant selection and disinfection. Use virus-free tissue culture seedlings and special mother plants. The special mother plant should select disease-free and healthy seedlings in October of the previous year. Dip the seedlings with Kairun 250g/L pyraclostrobin EC 800 times for 2 minutes for disinfection. After drying, the fake plants should be cultivated and overwintered in the mother plant garden. When transplanting the mother plant from March to April, process it again according to the above standards and methods, and remove diseased mother plants with too small leaves.
Mother plant planting. Transplant as early as possible to produce enough seedlings before plum blossoms appear. The distance between planting plants is 50 cm, and it can be relaxed to 70 cm if tissue culture seedlings are used. Avoid planting too deep and do not bury the core leaves in the soil to prevent bud rot. After planting, water or apply dilute human feces to promote viable plants.
Fertilizer and water management. In the early stage (before the end of June), keep the soil moist and fertilize in time to promote stolons. In the later period (after early August), appropriately control fertilizer and water to promote flower bud differentiation. After the mother plant survives (early May), spray 50 to 100 mg/L gibberellic acid solution, and spray again every 7 to 10 days. Apply thin fertilizer frequently according to soil fertility and seedling growth, pour 0.3% urea or compound fertilizer solution every 10 to 15 days, or spread 5 to 10 kilograms of urea or compound fertilizer per acre on rainy days; it can also be combined with pest control and spraying Apply 0.3% potassium dihydrogen phosphate solution or foliar fertilizer. The optimal soil relative moisture content for stolons to occur is 80%, and attention should be paid to drought, irrigation and flood drainage.
Management of stolons and seedlings. Remove flower stems promptly and clean dead and diseased leaves in conjunction with weeding. Arrange the stolons and vines in time to distribute them evenly and maintain ventilation and light transmission. After the seedlings are all over the border (about early to mid-July), cut off the mother plant and dig out the seedlings in a dense area to make false plantings so that the seedlings are evenly distributed and reduce the incidence of disease. Spray 100 mg/L paclobutrazol solution in early July when the seedlings are all over the border, and spray again every 15 days to improve plant resistance.
Prevent weeds. Timely cultivating and weeding in the early stage of seedling cultivation. After the stolons cover most of the open space and the seedlings have taken root, remove weeds. Be careful not to disturb the seedlings that have taken root.
Spray prevention. At present, the drugs that are more effective in preventing strawberry anthracnose include Dasheng 80% mancozeb wettable powder, Zhibaike 25% prochloraz emulsifiable concentrate, Baitai 60% oxazole·Desenlian water-dispersible granules, and Kairun 250 g/L pyraclostrobin EC, etc. For open field cultivation, spray once every 7 to 10 days from May to June, and spray once every 5 to 7 days from July to August, alternately. During the high temperature period from July to August, spray once after a shower. The leaves, leaf undersides and stolons should all be sprayed.
Environmental control and prevention. Adopt rain and sun shade cultivation methods. Cover with film to protect from rain at the end of June; cover 60% with sunshade net during the high temperature period in July, or build a sunshade in the nursery; cover 60% with sunshade net during the high temperature period, cover day and night to prevent disease and heat damage.
Post time: Oct-30-2023