In all the work of lawn maintenance, weeds have the greatest workload. At present, the problem of turfgrass is becoming more and more serious in the country. Because the control is not timely, coupled with pests and diseases, lawns in many places have been spotted, and some have even been abandoned. China's chemical control technology for turf weeds only stays in reference to a small number of field crop herbicides with limited herbicide spectrum. How to solve the problem of lawn weed control? Especially to control gramineous weeds in gramineous lawn, such as goosegrass, bermudagrass, crabgrass, barnyardgrass, setaria, etc., has been a major challenge for improving the quality of our lawn.
First, the spring lawn weed chemical control points
1. Spring lawn weed growth characteristics (1) species: spring weeds dominated by broad-leaved weeds, followed by grass weeds. In the north of the Yangtze River, the dominant species are Sorbidae, leeks, scallops, wild peas, venigos, and spiny vegetables, which account for approximately 85% of the total comfrey, comfrey, cattle, oysters, wild oats, and mother-in-law. Naha, Zeqi, and some grass weeds account for about 15%. In the south of the Yangtze River, about 85% of the population live in Chunyu, Bancang, Li, Marmota, Setaria viridis, Madang, Qianjin, Miaojing, Shuidan, Nongjincao, Portulaca oleracea, etc., while others account for about 15%. . The annual weeds include Xiaoli, Jiaotong, and Sorrel.
(2) Growth characteristics: more than 90% of the seed propagation, and a small number of rhizome propagation. Seed emergence depth of 0 to 3 cm, individual 5 to 10 cm. Most plants emerge in the middle and late March, and flower from April to May.
(3) Growth regularity: The peak period of most weeds in the lawn is from mid-late March to mid-late June, and germinate with the increase of rainwater or watering, accounting for 90% of the total weeds, which is chemical weeding. Critical period.
2. The correct choice of herbicides (1) Each herbicide has a certain herbicide spectrum. For example, dimethyl tetrachloromethane has good effects in controlling sophora herba and wild oilseed rape, but the effect of preventing swine fever is not obvious.
(2) Effective herbicides should be selected based on the most local weed species. Superstars, weeding nets, diterpenoids, tribenuron, and a combination of Baijia mixture are effective for controlling broad-leaved weeds, while metsulfuron-methyl and chlorsulfuron-methyl (for the time being banned) have a long residual period and have an excessive impact on the soil environment. If the planting of broadleaf turfgrass or seedlings will cause serious phytotoxicity. When there are more grasses and weeds on the lawn, the use of Ping'an 5 has an ideal effect.
(3) Choose suitable herbicides for different turfgrasses. Turfgrasses are divided into monocotyledonous and dicotyledonous, warm-season and cool-season types, and turfgrass species are different, and their resistance to herbicides is also not the same. The order of resistance of the lawns from the largest to the smallest was as follows: Zoysia grass> Bermuda> Poa pratensis> Seashore paspalum> Ryegrass> Tall fescue> Crested bentgrass. Such as 2 A 4 chloramine salt for grass turf to prevent broad-leaved weeds on the turf safety; Bendazone treatment of broad-leaved legume lawn is more safe; kill with fine stability to control grassy weeds in broad-leaved lawn For turf safety, it is safe to use Ping'an 1 to control broad-leaved weeds in gramineous lawns, and it can also eliminate many kinds of vicious weeds, such as aconite and hollow lotus seeds.
(4) Different herbicide resistance in different growth stages of the lawn. Transplanting lawns can be treated with herbicides in both their flat and growing stages. For live turfgrass, herbicides must be used before planting, and the residual period must be considered, otherwise the seedling rate will be affected. After weeding, lawn herbicides are used for weed control before weeding, and the safety requirements for herbicides are very high. Live turf after the 5th leaf stage is suitable for more herbicides.
(5) Different weeding periods, herbicides are also very selective. The 5 leaves of weeds were relatively weak in drug resistance and had a small dose and good effect. More than 7 leaves increased in drug use, the effect decreased, and the safety factor on the lawn decreased. In the late growth stage of weeds, especially when weeds are strong, herbicides are even less effective.
(6) Problems that are worth noting, such as the impact of herbicide drift on other flowers, pesticide residue damage to plants, and environmental protection requirements. In areas where people are often active, such as golf courses, sports fields, park lawns, green lawns, etc., the use of herbicides with low toxicity and simultaneous spraying of herbicides should be as few as possible.
High Purity Active Ingredients
The factory of Insen Biotech was built in 2011, and has 11 years experence of plant extracts and fruit powder production. We can manufacture lots of active ingredients with high purity over 98%, such as Resveratrol 98% from Polygonum cuspidatum, Capsaicin 95%-99% from Capsicum annuum, Peprine 95%-98% from Pepper Seed, etc. These High Purity Active Ingredients boost the health of people in some extent and are very popular in the market.
Natural Capsaicin,Capsaicin Crystal Powder,Paeoniflorin Extract,Natural Pepper Extract Powder
Hunan Insen Biotech Co., Ltd , https://www.insenhealth.com