Non-pollution Chives Pests and Weeds Control Techniques

(1) Reasonable rotation: According to the reasonable arrangement of the onion propagation mode, it can be used as a paddy crop rotation, or it can be rotated with non-same crops to avoid continuous cropping. (2) Intercropping: Intercropping intercropping of different crops, such as intercropping with chives and carrots, can promote mutual growth. (3) Soil disinfection: The scallions shall be used as a continuous cropping field. Each acre shall be sterilized with 100 kg of lime, ploughed 2-3 times, and fully sun dried to reduce acid, bactericidal, and exterminate part of the underground pests. It is also permissible to spray the soil with a 75% difeno (sodium sulpholide) soluble powder 0.5-1.0 kg of fine soil per acre or 45 kg of water to disinfect the soil. (4) Sterilization of onion seedlings: propagation of bulbs by ramets, pre-soaking with 1.8% abamectin 3000 times solution for 10 minutes, killing the bulbs, and then draining the bulbs, using 20 grams of green hen 2 grams + 20 grams of green hen 5 Spray a bulb of 50-75 kg per kilogram of water and spray while spraying. After the treated bulbs are planted in time, they cannot be planted in a timely manner. (5) Harmless organic fertilizer: In order to speed up decomposition during composting of organic fertilizer, manure and ammonium bicarbonate may be added in an appropriate amount, and the ratio of carbon to nitrogen may be adjusted to fully decompose and the insects such as chafer, leaf miner and other insects may be spawned. Increase the field bug source. (6) Watering in proper amount: watering in the morning and evening, pouring water in the summer, and seeing dry and wet in the noon, avoid flooding. In the summertime, it is not possible to water at noon. Due to the large temperature difference between soil and water, it is not only easy to burn the roots, but also easily induces a variety of diseases. (7) cultivating loose soil and weeding: when the soil surface becomes dry after rain or watering, cultivating loose soil and weeding, reducing evaporation of soil moisture, increasing soil aeration, and promoting activities of aerobic bacteria such as nitrifying bacteria and sulfur bacteria in the soil. Promote root growth and mineral element absorption. When loose soil, it should be light and light, and it must not hurt the green onion. When the onion tube grows to about 15 centimeters, the cultivator is no longer cultivated and it is manually pulled. (8) Pastoral cleansing: The former is made up of pastoral debris and the weeds around the field will be burned or limed. The diseased plants will be removed in time and the soil will be disinfected with quicklime. The diseased leaves will be removed in a timely manner in a plastic bag and brought out. Fields are burned or buried deeper and they are not allowed to be picked up and thrown away.

Second, chemical prevention

Chives are accompanied by wax powder, and the liquid is not easily contaminated. Therefore, the use of pesticides has little control effect. When using pesticides, a small amount of detergent powder should be added. (1) Disease prevention and control: Re-grasping prevention: Prevent pests and diseases from occurring during onion growth, reduce onion tube wounds, and spray protective agents to prevent diseases. Botrytis cinerea and purple spot: In the initial stage of disease, 50% SulfoMax is used as a 1000-fold solution, 50% Epogonine as a 1000-fold solution, and 75% chlorothalonil as a 600-fold solution. Once every 5-7 days, even spray 2-3 Second, the agents are used interchangeably. Downy mildew, epidemic disease: spraying with 75% chlorothalonil 600 times solution, 64% antiviral 500 times, 50% carbendazim WP 500 times, 65% zeocin WP 500-700 times Liquid, 1:1:240-300 Bordeaux mixture is used once every 7-10 days and is continuously treated 2-3 times. Powdery mildew, rust: 25% of powder rust 1000 times, 15% triadimefon 1000 times control. Soft rot: Control with 72% agricultural streptomycin 4000 times. (2) Pest control: Onion thrips, onion leafminer: sprayed with 10% imidacloprid 2000 times spray. Tigers and earthworms: Irrigate with 50% phoxim 1000-fold and 30% trichlorfon 500-fold. (3) Weed control: After 2 days of transplanting, 50% acetochlor 50 ml per mu was used for water spray control.

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