Who knows the specific control methods of Cyperaceae weeds?

In May and June, a large number of Cyperaceae weeds, including Cyperus rotundus, Spartina alterniflora, Cyperus esculentus, centipede and Cyperus sedge, appeared on lawns in Guangdong, Guangxi, Fujian and other places in China, which is a big problem for lawn maintenance managers. This season is the best time to control Cyperaceae weeds, and it is suggested that maintenance managers pay attention to control. Details are as follows:

1. The control of Cyperaceae weeds in gramineous lawns mainly refers to Kentucky bluegrass, Lolium perenne, Festuca arundinacea, Manila and Bermuda grass.

(1) Controlling annual Cyperaceae weeds

Common annual weeds in Cyperaceae mainly include Cyperaceae, Cyperus alterniflora and Cyperus fragrans. The above weeds can be prevented and eliminated by using Daphne odora. Spraying 2 bags of Cyperaceae plants evenly with 25-30 kilograms of water every 660 square meters can effectively control annual weeds with less than 7 leaves, and the roots can rot 80% once used.

(2) Control of the malignant weed centipede

Scolopendra scurried about in the lawn, pulling out more and more leaves, adapting to low pruning, which was not conducive to the absorption and conduction of liquid medicine. It has just emerged from the soil, producing a large number of seeds, which has brought great problems to prevention and control. Therefore, the control of centipede has certain skills, otherwise it is difficult to achieve the ideal control effect. Prevention and control skills are introduced as follows:

1, trim before application. Because centipede leaves are very thin and easy to heading and flowering, it brings a lot of inconvenience to drug control. In order to achieve good absorption and conduction of liquid medicine, pruning should be done before application, so that the stems and buds of centipede lose the cover of lawn and are convenient for taking medicine. The purpose of weeding and uprooting can be achieved more easily through the full absorption of the liquid medicine by the buds.

This stadium needs frequent pruning. In order to prevent the medicinal leaves from being pruned after administration, they should be pruned before administration. Use medicine after pruning for 4 days (there is no fixed time, depending on local climate conditions and management conditions).

2. Water the lawn grass before painting, trim it, and water it before painting. Water is beneficial to the germination of centipede buds and the absorption of herbicides, and it can be watered 2-3 days before application. Promote the germination of centipede buds.

At the same time, because we all use systemic conduction herbicides, the absorption and conduction of herbicides directly affect the weeding effect. Water is a solvent for plants. With sufficient water, the life activities of plants are relatively vigorous, which is beneficial to the absorption and conduction of herbicides. When there is enough water in the air, soil and plants, the stomata of plants will open, the waxy layer of leaves will become thinner, and the speed of plant absorption and conduction will be accelerated, thus promoting the absorption and conduction of herbicides in all aspects and improving the efficacy. However, it should be noted that when the water is too sufficient, the absorption of chemicals by plants will decrease.

3, choose the right medicine, grasp the dose.

Scolopendra, Bermuda, Manila, blunt-leaved grass and centipede in cool-season lawn can be selected, and 25-30 kilograms of water can be added to 4 bags of centipede per 660 square meters.

Hawaii can be selected for the prevention and control of seashore paspalum lawn.

Bermuda grass and centipede in Manila can also choose Kimbo Xiu and Kansha. Spray 8 bags of Jinbaixiu and 2 bags of Praseodymium with 25-30 kilograms of water evenly every 660 square meters.

4. Pay attention to the weather forecast

The weather is clear, the sun is shining, the temperature is high, and the medication effect is good. Because it is used in a large area, the cost of each application is not low, the effect is very important, and the weather has a great influence on the medicine. Pay attention to the weather, and it is best not to rain for 24 hours. Sunlight has a direct effect on plants. When the light is strong, the life activities of plants are active, which is beneficial to the rapid absorption of herbicides. High temperature is beneficial to the drug effect. At the same time, avoid taking medicine at noon in hot season. At this time, the absorption and conduction effect is not good, and evaporation is very severe. You can choose to take the medicine before eleven pm and after four pm.

5, spraying method

When applying pesticide, the secondary dilution method is adopted, and synergist is added to promote absorption. When applying pesticide, it must be sprayed evenly. Because centipede has a strong concealment, it must be sprayed on the lawn to achieve comprehensive weeding and one-time eradication of weeds. Don't water it for three days at the same time, and don't trim it for a week, because we use stem and leaf treatment agent. At the same time, because the agent used is stem and leaf treatment, the requirement for humidity is not as strict as that of pre-bud treatment agent. For centipedes that can't be sprayed last time, consider spraying again. When praseodymium is used, the risk of drug damage caused by repeated spraying can be ignored.

2. Control of Cyperaceae weeds in other lawns

1. Clover lawn Cyperaceae weeds can be controlled by clover enhancement, and sprayed evenly with 2 sets of clover enhancement mixed with 25-30 kg of water every 660 square meters.

2. Using Ophiopogon japonicus can control Cyperus rotundus and other sedge weeds in the lawn of Ophiopogon japonicus, and spray 40 grams of Ophiopogon japonicus and 25-30 kilograms of water evenly every 660 square meters.

3. Sedge and other Cyperaceae weeds appear in the horseshoe golden lawn, which can be controlled by using horseshoe golden net powder. Mix 16-20g horseshoe net powder with 25-30kg water and spray evenly every 660m2.

Third, special reminder

1, in June, the high temperature and high humidity season gradually entered, and the lawn was prone to various diseases such as brown spot disease. Therefore, when using herbicides, we must pay attention to whether there are diseases on the lawn. Once the disease occurs, appropriate fungicides (such as bacitracin) should be sprayed in time, and herbicides can only be used after the lawn returns to normal.

2. When using herbicides, be sure to read the instructions carefully and use herbicides in strict accordance with the instructions. If you need to increase the dosage according to the weed situation, you can consult the technicians (hotline: 037 1-65659988).

3, due to improper use of herbicides caused by phytotoxicity, must be timely rescue. Rescue method: it must be used within 4 days after the drug damage is found. At this time, brassinolide+Sansi Zenglvling+rapid rooting+a small amount of urea+a small amount of potassium dihydrogen phosphate were used. Once every 5-7 days, twice in a row can completely detoxify. At present, most systemic herbicides almost use this formula. But after 5 days of drug injury, the longer it takes, the more difficult it is to detoxify.