According to a survey of a variety of cucumber infestation diseases, about 34.6% of seeds are transmitted by bacteria, mainly including anthrax, scab, black spot, and bacterial keratoses, so seeds should be disinfected prior to sowing. .
There are many methods of disinfection, of which the heat sterilization method is better, has the advantages of simple operation, wide sterilization spectrum, safety to seeds, environmental protection, cost savings, etc., and is suitable for adoption by a large number of farmers. Method: Immerse the cucumber seeds in room temperature water for 4 hours, dip and dip them into 55°C hot water, heat and sterilize them for 15 minutes, then remove them and put them into cold water to cool down, and then transfer to germination or sowing. The precautions are the water temperature and time strictly complying with the technical requirements.
Seed treatment includes seed disinfection and soaking, germination.
(1) Seed Disinfection: Seed disinfection is the most economical and effective method for preventing and controlling a variety of infectious diseases and insect pests. It is an indispensable measure to prevent plant diseases and insect pests. Due to the small amount of seed treatment and the long harvest time from the cucumber, there is almost no problem of pesticide residues, so it is also an important measure to promote the use of pollution-free vegetables.
1 Seed coating: The seed coating agent contains fungicides and insecticides that kill pathogens and underground pests, as well as trace element fertilizers and plant growth regulators that can promote seed germination and cucumber growth. Some of the commodity seeds are already coated before delivery, and the use of such seeds does not require disinfection.
2 Warm soup soaking: Warm soaking is a method of killing germs on the surface of seeds by high temperature using the difference in tolerance of dry species and germs to high temperatures. The dried seeds were put into warm water of 55-60°C, stirring constantly, and hot water was continuously added, and the water temperature of 55-60°C was maintained for 10 minutes. The temperature was lowered to 28-30°C and soaked for 4-6 hours. The germination was performed after panning.
3 Pharmaceutical soaking: First, use 72.2% Prokary water or 25% metalaxyl wettable powder 800 times soaking for 20 minutes to prevent fungal diseases of cucumber seedlings. Second, 50% of methine WP can be soaked for 500 minutes to prevent anthracnose and stem blight. Thirdly, disinfecting with 2.5% Shiloh suspension seed coating agent can not only kill the pathogenic fungi latent in the seed coat, but also penetrate into the seeds to kill the pathogenic fungi invading the seeds and effectively prevent the melons from seedling stage. Dysplasia, blight and other diseases. Fourth, in order to prevent viral disease caused by seeds, it can be soaked in 10% trisodium phosphate solution for 20 minutes. Fifth, the 1 million-unit agricultural streptomycin 500-fold dilution soaked for 2 hours can prevent bacterial diseases.
Regardless of the kind of agent used to soak seeds, the seeds should be washed with water after soaking so as to prevent the occurrence of phytotoxicity.
(2) Soaking and germination
1 Soaking: Seeds soaked in warm soup or soaked in pesticides and soaked for 4-6 hours at a temperature of 25-30°C, so that the seeds absorb 50-60 % of their dry weight, and then hand-wash the mucus on the seed coat. , Remove germination inhibitors, rinse off impurities and pods, and rinse with water.
2 Germination: Seeds soaked are wrapped in clean wet gauze. The wet towel wrung out on the bread is placed in a place of germination at 25-30°C. Wash 1-2 times daily with warm water, continue to germinate after panning, germinate at a temperature of 25-30°C for 16-20 hours, sow seeds that have germinated in batches and sow or place at 5-8°C Under the conditions, all the seeds are sown together.
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