During the cultivation of strawberries, attention should be paid to the management of fungicides and water and fertilizer, and it is necessary to actively control various diseases of strawberries.
1. Water and fertilizer control: Before June, nitrogen, phosphorus, potassium fertilizer and trace organic fertilizer are needed to promote the rapid growth of seedlings. Spraying foliar fertilizer can be carried out in July. It is a season of high temperature and high humidity, and it is also a period of high incidence of seedlings. When controlling water and fertilizer, stop fertilization, prevent sudden growth, and seedlings need to balance growth, which is conducive to bud differentiation. It is necessary to spray bactericidal drugs and insecticides in time to prevent the occurrence of various pests and diseases.
2. Pest control: spray bactericidal drugs at intervals of 7-10 days to prevent and treat diseases such as powdery mildew , downy mildew , gray mold , blight , root rot and so on. Spray insecticides at intervals of 10-15 days to prevent and treat underground pests such as spider mites, whitefly, leaf curlers, and tigers and golden worms. During this period, some agents that promote root development can be sprayed to activate root cells and help to grow seedlings.
3, drug management: anthracnose, 5-6 months plant disease period, August-September is the peak incidence, need to spray prevention. At present, the main medicines for preventing strawberry anthracnose are Dasheng 80% mancozeb WP, 100g of prochloraz emulsifiable concentrate, Baitai 60% azole ether·Diesen water dispersible granules, Kairun 250 g / liter of pyraclostrobin emulsion and the like. Spray every 7-10 days from May to June, and spray once every 5-7 days from July to August. During the high temperature period from July to August, the medicine is sprayed once after the shower. Foliar, leaf back, and stolon are evenly sprayed.
Blight; all parts of the plant can be killed. The leaves are damaged, and there are large irregular water-immersed brown spots, and the white fungus on the back is a fruiting body of the pathogen. The leaf vine becomes brown, and the white mold-like fruit body is also produced; the 25% scorpion bacterium 500 times solution can be sprayed 2-3 times, and the 64% antivirus WP WP solution is 500 times.
Into the middle to late July to August, spray 80 times with 80% trichlorfon emulsion 2-3 times to prevent the nematode.
Aphids: Control when they occur. The agent can be sprayed with an imidacloprid such as 10% imidacloprid 2500-3000 times. Red spider: The agent can be sprayed with 15% 哒螨 1200 times solution or 57% acetylene 2 2500 times solution.
Powdery mildew: May-June is the peak period of onset, and the initial onset period is timely controlled. Use 300g / L of epothilone · nicotinamide 1000 times solution, or 50% Tsuibei 3000 times solution, or 99.1% green Ying 300 times mixed with Ye Fu 1500 times solution, or 5% myclobutanil 1500 times solution, Or spray 40% Fuxing 4000 times solution.
(6) The harvest of the seedlings can be harvested in batches according to the size and size of the seedlings. The seedlings should be cooled and moisturized at the time of harvesting to prevent the seedlings from being exposed to sunlight in the sun, and the seedlings harvest time. It is best to carry out before 11 o'clock in the morning and after 4 o'clock in the afternoon. In order to ensure the survival rate of the seedlings, the seedlings are promptly sent to the low temperature air conditioning warehouse for low temperature treatment. Prevent seedling fever and affect survival rate.
Specifications of special seedlings and first-grade seedlings: special seedlings, roots of 0.8 cm or more, 8 roots, 7 cm long, no pests and diseases. First-grade seedlings, roots of 0.7 cm or more, 6 roots, 5 cm long, no pests and diseases.
Knitting Machine Oiler,Circular Knitting Machine Oiler,Electronic Lubricator Oiler,Lubricator Oiler
Changzhou Longfu Knitting Co., Ltd. , https://www.circularmachine.com