Cucumber seed-borne diseases, mainly anthracnose, black spot disease, black spot disease, bacterial angular spot disease, etc., so soaking seeds should be disinfected before sowing. Seed disinfection is an indispensable measure to prevent seedling pests and diseases. The dosage is small, the cucumber harvest period is long, and there is no pesticide residue problem. China Pesticide Network Xiaobian introduces you to several effective disinfection methods, as follows: Double Tile-flange Tray Ningbo Waltmal Sanitary Wares Co., Ltd. ,
(1) Soaking seeds soaking seeds is to soak the seeds with water of suitable temperature to make the seeds swell and swell. At the same time, the seeds are smashed, the mucus on the seed coat is washed, the sorghum seeds are removed, and the impurities are removed. Always use clean utensils for soaking seeds. Do not use oily and salted containers. Otherwise, seeds will be eroded and germination will be affected. Soaking seeds are mostly soaked in warm water of about 250C. The soaking time of cucumber is 4 to 6 hours, and the longest is no more than 12 hours. When the seeds are soaked, remove the mites and impurities and remove the epidermal mucus.
Some experiments have shown that using 3% potassium nitrate solution, or 1:1 mixture of 3% potassium nitrate and 3% potassium dihydrogen phosphate in 100C dark conditions for 3 or 4 days can significantly improve the seed at low temperature (9 ~ 130C). The emergence rate under conditions. Seed vigor can be improved by treating with 250 g/L polyethylene glycol solution for 12 hours, dry heat treatment at 750 C for 24 hours or pre-expansion treatment at 150 C for 12 hours.
(2) Disinfection 1 Instant high-temperature disinfection Put the seeds into 900C-950C water for 5-7 seconds to kill or passivate the pathogens or viruses attached to the surface of the seeds. Note that when treated with this method, the seeds must be dry.
2When the soup is soaked in the warm soup, use 50-550C of water (the amount of water is 4-5 times of the seed amount), stir the seeds continuously, burn for 10 to 15 minutes, add hot water when the water temperature is not enough, then put The seeds are removed from the water, and then placed in warm water of about 300 C for another 4 to 6 hours, and then germinated.
3 Formalin disinfection soak the seeds in clean water for 4 to 5 hours, then put them in 100 times formalin solution for 15 to 20 minutes, then remove the seeds and wrap them in a damp cloth, and put them in a closed container. ~3 hours, then rinse with water. It can prevent cucumber anthracnose and blight. If you use 50 times of formalin solution, soak for 30 minutes, the concentration is too large to be susceptible to phytotoxicity.
4 Potassium permanganate disinfection Cucumber seeds soaked for 2 to 4 hours, soaked in 0.1% potassium permanganate solution for 30 to 60 minutes, soaked, rinsed with water and then germinated.
5 carbendazim disinfection with 50% carbendazim WP 500 times solution, soak seeds for 30 minutes. Wash with water and germination.
6 Trisodium phosphate disinfection Put the soaked seeds into 10% trisodium phosphate solution, soak for 40 to 50 minutes, remove them, wash them with water and then germination. Tobacco mosaic virus that can passivate or kill the surface of the seed.
7 pesticide seed dressing with 70% dikesone powder or 50% dichloronaphthylquinone wettable powder seed dressing, the dosage is 0.2% ~ 0.3% of the weight of the seed, can control cucumber blight. Seed dressing with 0.3% to 0.4% of cuprous oxide equivalent to the dry weight of the seed can prevent rickets. Seed dressing requires that both the agent and the seed be dry.
8 Seed dry heat treatment The dried seeds are placed in a 700 C dry box for 2 to 3 days to kill the pathogens attached to the seeds. It also enhances seed vigor and promotes seed germination. It can prevent blight.
9 seed coating seed coating agent contains fungicides and insecticides for killing seed-borne diseases and underground pests, and trace element fertilizers and plant growth regulators which can promote seed germination and cucumber growth. Some of the commercial seeds are now coated before leaving the factory, and such seeds do not need to be disinfected.
In addition, 77.2% Plex water agent or 25% metalaxyl WP 800 times solution, soaking seeds for 20 minutes, has a good effect on cucumber blight. Soaking seeds with 50% Fumei double wettable powder 500 times for 20 minutes can prevent the occurrence of anthracnose and blight. Soaking seeds with neomycin injection 200 mg / liter solution for 1 hour, or soaking seeds with 1 million units of streptomycin sulfate or chloramphenicol 500 times solution for 2 hours, has a good effect on cucumber bacterial diseases.
Tips for the pesticide network : To grasp the concentration of soaking seeds, wash them with water after immersion and then germination. Otherwise it may cause phytotoxicity.