What should yam sow notice?

What should we pay attention to when sowing yam? At present, it is the sowing season of Chinese yam. In order to effectively control the harm of diseases and insect pests, we should pay attention to the following points when sowing: crop rotation: root-knot nematodes can survive in the soil for more than 3 years. Diseased Reed head, diseased body and diseased soil are the main ways of nematode transmission. Yam and cotton, radish, eggplant and pepper should be rotated for more than 3 years in conditional areas. In the new planting area, disease-free seed blocks should be strictly selected to prevent the introduction of nematodes. Seed block treatment: accept the lesson that some farmers directly planted rotten seeds and dead seedlings with fresh seed blocks in previous years, insist on dipping both ends of the broken blocks with mancozeb powder and basking thoroughly in the sun. Soaking the seed block with the mixture of carbendazim, strychnine and water with the ratio of 2 to 1 / 1000 for 5 minutes and then soaking the seed after drying can effectively control leaf spot blight and anthracnose at seedling stage. Soil treatment: ⑴ controls nematodes and underground pests. For the continuous cropping field, sprinkle the chemical in the soil layer during the turning of the trenching machine, using 3-3.5 kg of thiazolyl phosphine (thiazolyl phosphine) of 10% per mu. If the ditching machine does not have a pesticide application device, the above dosage can be applied in the soil layer with the depth of 40 cm and 20 cm respectively when the ditch is leveled. After the top layer is applied, turn it over with a spade, and then cover the soil. For the new stubble field, you can first spread 10% luck per mu more than 2 kg between the next row, and then turn the ditch. Avoid direct contact between seed block and chemical agent during application. ⑵ can control soil-borne diseases. Before sowing, spray 45% carbon withered 1500-2000 times liquid or credible actinia 500,600 times liquid into the seed ditch, and then spray the above solution again after sowing and covering the soil. Click to see more yam planting techniques click to see more vegetable planting techniques