Lawn weed control strategy
The control of lawn weeds should follow the principle of soil treatment, supplemented by stem and leaf treatments. The former is the defense, the latter is the rule.
Soil treatment refers to the method of applying herbicides to the soil surface during the germination period of weeds. The advantage of this treatment method is that it can actively eliminate weeds in the bud, avoid the symbiosis between weeds and lawn, and provide a good growing environment for the lawn. At the same time, it can control most of the annual broad-leaved weeds in most annual grass weeds and broadleaf weeds in the lawns of grasses, and alleviate the control of grass weeds and broad-leaf lawns in grass lawns after the emergence of weeds. The problem of preventing broadleaf weeds in China. Disadvantages of soil treatment are that it is effective only for annual weeds that are propagated by seeds, and is ineffective for most perennial weeds that are propagated in underground rhizomes.
Stem and leaf treatment refers to the treatment of spraying herbicides directly onto weed stems and leaves. The advantage of this treatment is that the primordium is removed, targeted, administrators are most receptive, and have a good control over perennial weeds. Its disadvantages are that some herbicides have poor selectivity, and improper use may cause injury to turfgrass. After use, the poisoned weeds will be yellow and adhere to the lawn surface, affecting the overall appearance of the lawn.
There are two main peaks of weeds occurring in the Yangtze River Basin during the year, namely March-April and September-October each year. The former is dominated by spring and summer weeds, and the latter is dominated by fall and winter weeds. The amount of weeds that occurs in the rainy season in June is also quite small every year, and there are fewer weeds in other months. Therefore, timely application of three times soil treatment herbicide in the above three phases can achieve a good preventive effect. Of course, perennial weeds can be controlled with herbicides for stems and leaves. In this way, the use of 4 herbicides in one year, namely in the early spring, spring and summer, autumn and dormant seasons respectively, can basically achieve the purpose of controlling the annual weed damage.
Soil treatment refers to the method of applying herbicides to the soil surface during the germination period of weeds. The advantage of this treatment method is that it can actively eliminate weeds in the bud, avoid the symbiosis between weeds and lawn, and provide a good growing environment for the lawn. At the same time, it can control most of the annual broad-leaved weeds in most annual grass weeds and broadleaf weeds in the lawns of grasses, and alleviate the control of grass weeds and broad-leaf lawns in grass lawns after the emergence of weeds. The problem of preventing broadleaf weeds in China. Disadvantages of soil treatment are that it is effective only for annual weeds that are propagated by seeds, and is ineffective for most perennial weeds that are propagated in underground rhizomes.
Stem and leaf treatment refers to the treatment of spraying herbicides directly onto weed stems and leaves. The advantage of this treatment is that the primordium is removed, targeted, administrators are most receptive, and have a good control over perennial weeds. Its disadvantages are that some herbicides have poor selectivity, and improper use may cause injury to turfgrass. After use, the poisoned weeds will be yellow and adhere to the lawn surface, affecting the overall appearance of the lawn.
There are two main peaks of weeds occurring in the Yangtze River Basin during the year, namely March-April and September-October each year. The former is dominated by spring and summer weeds, and the latter is dominated by fall and winter weeds. The amount of weeds that occurs in the rainy season in June is also quite small every year, and there are fewer weeds in other months. Therefore, timely application of three times soil treatment herbicide in the above three phases can achieve a good preventive effect. Of course, perennial weeds can be controlled with herbicides for stems and leaves. In this way, the use of 4 herbicides in one year, namely in the early spring, spring and summer, autumn and dormant seasons respectively, can basically achieve the purpose of controlling the annual weed damage.
Obstetric Delivery Table is suitable for gynecological diagnosis and examination, child-birth, caesarean operation and other gynecological surgical operations. Its height adjustment, back section and sitting section adjustment are precisely and smoothly controlled by pus rod. The low voltage system ensures user`s safety. The table has an aesthetically beautiful bodyline and the bed mattress is soft and made of leatheroid, which makes them easy to be taken off, cleaned and sterilized.
Obstetric Delivery Table
Obstetric Delivery Table,Gynecology Delivery Table,Delivery Table,Operating Table For Delivery
Shandong Lewin Medical Equipment Co., Ltd. , https://www.lewinmed.com