(1) Choose good seed and do a good job in seed processing. Spraying direct seeding rice should select dwarf resistant varieties. At present, the ideal varieties are “Culture No. 1†and “Xiu Shui 09â€. The seed treatment and disinfection are the same as conventional hand insertion, ie, the seed is sown 1 to 2 days before sowing, and soaked with 700 to 800 times of evil thread for two days and two nights to destroy the short shoots. As the seedling stage of direct seeding rice can not be managed as centralized as in paddy fields, pesticides for controlling seedling pests can also be added during soaking. For example, 40 ml of fipronil or 100 g of imidacloprid per 50 kg of seeds can be added for seed dressing or soaking. Ensure pest control within 20 days. For the prevention and treatment of queer pests, add 12 grams of 35% “Good Anwei†seed dressing for every 10 to 12 kilograms of seeds.
(2) Moderate ploughing and surface-to-surface communication of live rice fields require that weeds be removed from the weeds in the first week before ploughing, or appropriate early ploughing, to encourage decay of the old grass roots; Hey, do a good job of leveling, fertilizing, and ditching. To prevent over-cultivation of ploughing fields and boring seed and rotting after planting. Immediately after sowing, pass through the ditch to ensure draining of field water. Ditch and interval width vary from farm to farm.
(3) Timely sowing and reasonable planting of suitable close planting of single-season late rice, taking late-cultivars varieties as an example, generally from the end of May to the beginning of June, so as to sow in before entering Mei. Density should be determined according to the tiller characteristics of the variety and the size of the panicle type. Generally, about 70% of the conventional late-harvest cultivars can be grown within 40 days, and the sowing volume is about 2 to 3 kilograms. The weak cultivar can be appropriately increased, but should be reduced appropriately. It is advisable to have no less than 4 seedlings per square foot (approximately 0.11 square meters).
(4) The most important management link for chemical rice weed sprayer to spray live rice is to do chemical weeding timely. Weeding requires that the amount of medicine used be sufficient and not overdone, that the amount of water is sufficient and that the field is moist. The use of motorized sprayers, hand sprayers, and high pressure pump worms can all be used. The first weeding was done within three days after sowing, and it was done when the pods were still wet. The use of drugs should be accurate and the amount of water should be sufficient. The amount of water should be more than 30 kilograms per acre rather than shoots. At present, the ideal pesticides and dosage are as follows: 1 30% of grassroots special oil produced by Hangzhou Qingfeng Agrochemical Co., Ltd. is 100 ml per mu. 2 40% of the live broadcast produced by Zhejiang Leji Chemical Factory is 60-70 ml per mu. 3 herbicides such as cockroach, pups, and saurian can also be used.
The second weeding is carried out within 15 to 30 days after sowing, generally before the seedlings grow to the three-leaf stage. If grass seedlings are found to have been pumped, they can be replaced. At this time, the weeds are mostly smaller than the seedlings. We should consider the type of weeds to select pesticides, such as broad-leaved weeds, can choose rice farm music, Tian Caoguang, Kasei Huanglong, grass busters, etc.; such as grasses, etc. can be used to kill the Emperor And other herbicides. The water can be sprayed after the water is sprayed, or combined with fertilization and fertilization.
The third weeding is carried out about 1 month to 40 days after sowing after the seedlings grow to 5 leaves to 7 leaves. Thousands of gold occur in some areas are more serious, can choose to use Germany's Viagra Pai company's production, spray 30 ml per acre, the effect is very significant, but the amount must be strictly controlled, the time must be controlled before the 7 leaves.
(5) Strengthen field management
The day-to-day management measures for the field-sprayed live broadcast are basically similar to those for conventional hand-inserting, and special attention should be paid to:
One is early control. Because the seedling temperature and light conditions of rice seedlings are good, and the tillering is early and fast, the control of the seedlings in the field is 15 to 20 days earlier than that of the conventional rice. Usually, it takes about one month after sowing.
The second is to strengthen pest control. Due to the direct injection of direct rice, the seedling area is about 10 times larger than that of the conventional field, and the management is inconvenient. Therefore, besides the addition of pesticides, 20 days after sowing, pesticides should be used to control pests, and 50% of the pesticides should be selected for long-term efficacy. Rui Jin special suspension agent is good, the amount of 30-40 ml per acre flush even spray, can effectively control the third generation of rice stem borers and second-generation rice leaf roller and rice planthoppers early hazards. In the future, prevention and control can be based on information provided by the local pest information agency. The amount of water must be sufficient to ensure a good harvest.
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