Weeding in the celery field is a time-consuming and labor-intensive farm work, which often results in reduced yields due to untimely weed control. Herbicides for weed cultivation in open field can account for more than 40% of the entire cultivation and management process. Weeding at the seedling stage is particularly labor-intensive. Applying chemical weed control is necessary.
I. Weeding in celery nursery fields
Celery fields are prone to weed damages such as sedges, gray ashes, purslane, crabgrass, and wild leeks, especially in the open field cultivation of celery and nursery. The nursery celery has strong resistance to various herbicides, but the young seedlings are just unearthed and the young stems are easy to produce phytotoxicity when they are not yet erect. The use of trifluralin, pendimethalin (Shi Tianbu), oxadiazon (oxadiam), flupirazilam (high-efficiency herb) can be used for herbicides.
First, use 48% trifluralin EC 100-150 ml per mu for 40-50 kg of water, evenly spray on the surface of the soil before the celery sowing or before sowing seedlings, and then shallowly mix the soil, safe for the emergence of celery, weeding The effect is good. Note: If celery seedlings are covered with straw or shade nets, they should be applied before using the shade or shade net.
Second, use 33% Shi Tian to make up 100 to 150 ml of water per hectare and 40 to 50 kg of water. After the celery sowing, the seedlings are evenly sprayed on the surface of the soil. Precautions: Low doses of sandy soil should be used, and medication should be applied before covering or covering the net.
Second, transplanting weeds
Before or after transplanting, the following herbicide can be used:
1. Apply 48% trifluralin EC 100-150 ml water to wet 50 kg of soil per acre, and mix the medicine and soil with a rake to transplant the celery.
2. Before transplanting, use 33% of herbicide-concentrated emulsifiable concentrate 100-150 milliliters of water and 50 kilograms of water per acre to fully spray the surface of the soil.
3. The use of 48% diammonium emulsifiable concentrate, 250 ml water and 60 kg water per mu, is applied to the soil surface after transplanting.
Third, pay attention to matters
1. Reasonably choose herbicides. The herbicides are highly selective, and no matter which herbicide is used, it is necessary to find out the name, content, adapted crop, taboo crop, herbicide type, application concentration and method.
2. The correct use of herbicides. The application of herbicide should be smooth and the soil should be finely crushed and moist. The use of herbicides is generally best before the growth of weeds, and the amount of herbicide should be increased.
3. To select a sunny, windless, high temperature weather, the droplets should be fine, spray should be uniform.
4. The use of herbicides in field mulching films has higher efficacy, and the dosage should be relatively reduced. Generally, the dosage of herbicides is reduced by about 20% compared to open field.
5. Each time the herbicide spray used on the medical equipment must be pour the residual liquid, and wash with alkaline water 2 to 3 times, and then rinse with clean water, so as to avoid residual liquid medicine caused by phytotoxicity. If conditions permit, the herbicide spraying herb is best used exclusively.
6. After celery spray herbicide, if phytotoxicity occurs, Huimanfeng active liquid fertilizer can be sprayed 800 times to ease the injury.
IV. Post-drug management
When applying to sandy soil, no water can accumulate after spraying. It is necessary to pay special attention to the fact that the growth of celery during the early and middle stages of growth is slow, and it takes a long time to grow grasses in the field. This time, in the process of weeding, it is better to use fertilization, and the effect will be better. After planting, till ridge tillage, cultivating 3 to 4 times, combining cultivator with soil, is conducive to the growth of celery.
China Daily chemical Suppliers
Here you can find the related products in Daily chemical, we are professional manufacturer of Daily chemical. We focused on international export product development, production and sales. We have improved quality control processes of Daily chemical to ensure each export qualified product.
If you want to know more about the products in Daily chemical, please click the Product details to view parameters, models, pictures, prices and Other information about Daily chemical.
Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Daily chemical!
Hydrolyzed Keratin, Menthol, Daily Chemistry, Cosmetics Field
Xi'an Gawen Biotechnology Co., Ltd , https://www.ahualyn-bios.com