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Corn Seed Selection and Processing
Rice and corn are the main food crops in Bijie. Prevention and control of pests and diseases is a powerful guarantee for increasing grain production and increasing income. Seed treatment can effectively prevent and control species and soil-borne diseases and pests, and is the first line of defense against pests and diseases. In order to control the damage of rice blast, bastard disease, acanthopanosis, corn smut, and underground pests, all localities should take advantage of favorable opportunities to effectively select and handle rice and corn seeds to ensure that crops are fully grown. , Miao Zhuang, safe production. The seed treatment method is simple and easy, and can achieve a multiplier effect. Treatment methods are as follows: I. Selection and treatment of rice seeds 1. Drying seeds: Choose sunny days and put the seeds in the sun for 2 to 3 days to break the dormancy period of the seeds and increase the vitality of the seeds. 2. Seed selection: Generally adopt wind screening and screening. Remove diseased grains, pods, worms, and impurities, then stir thoroughly with 20% saline, remove the pods and impurities floating on the top, remove the sinking and full of seeds, and rinse in clean water to soak seeds. 3. Soaking and disinfecting (1) Strong chlorine soaking: The selected seeds are soaked with fresh water for 12 to 24 hours, and then put into 400 to 500 times of liquid medicine (that is, 10 grams of strong chlorine fines to 8 to 10 kg of water. ) After immersing for 12 to 24 hours, remove and rinse with clean water to germinate. It can prevent rice blast. (2) Soaking with lime water: Pour the selected seeds into 1~2% fresh lime water for 4~5 days. Note that the water surface should be 4~5 inches higher than the seeds and capped, and the water surface film should not be agitated. The seeds are rinsed with water to germinate. (3) Bacterial insect soaking species: 15 to 20 grams of medicine is poured into a cylinder or a bucket, and water is diluted 1:400. The 6 kg of rice seeds are poured into the liquid and turned several times up and down. The soaking time varies depending on the temperature. And set: the temperature of 18 ~ 20 °C immersed for 60 hours, 23 ~ 25 °C immersion 48 hours after germination sowing. It can effectively prevent and control diseases such as rice bakanae disease and dry-needle nematode disease. (4) Soak the seeds in 100 grams: Use 25% to make 100 grams of 2 ml of water, add 4 to 6 kg of water, and soak seeds of 3 to 5 kg. Soaking time 48 ~ 60 hours, can effectively prevent rice bakanae disease, rice blast, leaf spot disease and other flax. Second, corn selection and processing 1, seed selection: including panicle selection and grain selection. When the panicles are selected, they are dried and threshed in the field when they are used to dry the ears in the field, and are mixed, matured, pests, and rotten crops. The particle size is selected by screening before going to small, pod-grained, mold-removing, broken, worm-eaten and sundries, so that the size is even and full, which is good for seedlings and seedlings. 2. Seed treatment (1) Drying: Drying for 2 to 3 days in sunny weather will help increase germination rate, early emergence, and reduction of head smut. (2) Soaking: Soaking seeds can promote germination, emergence, and seedlings. Methods cold soaking 12 ~ 24 hours; 50 °C (two open a cool) warm water soak 6 ~ 12 hours; with 30% or 50% of fermented urine soaked for 12 or 6 ~ 8 hours; 500 times potassium dihydrogen phosphate solution Soaking for 8 to 12 hours can achieve the same effect. Soaking should pay attention to full hard seed type time can be longer, pod, dentate seed time should be short; soaked seeds do not sun, do not stack, do not install plastic bags; dry before the seed dressing; drought In case of lack of land, dry ground and lyrical conditions, soaking of seeds is not allowed; seeds soaked must be timely sowed. (3) Chemical seed dressing: available 15% triadimefon wettable powder 400 ~ 600g mixed with 100 kg seed to prevent corn head smut, can also be used 50% phoxim 50 ml water 3 kg seed dressing 20 kg heap stuffy 4 hours After sowing, or seed dressing seed dressing, coating control underground pests.