Lawn weed control

First, the occurrence of weeds in the lawn field

1 a wide variety of weeds

Grass weeds are: look at Mai Niang, Valerian, Thousand Gold, Bluegrass, foxtail, crabgrass, goosegrass and teff. The sedge weeds are: fragrant aconite, water sedge, sedge, sedge and leeches. Broadleaf weeds include: small canopy, one-year poncho, big nest, rice leeks, bitter glutinous rice, wild geranium, curly ears, purple diced, muddy broccoli, maijiagong, thorny vegetables, broken rice荠, 通泉草, 斑地锦, plantain and water peanuts.

The dominant species of weeds: monocotyledonous turf fields such as Manila are maiden, valerian, fragrant aconite, and stalked grass; horseshoe and other broad-leaved turf fields are small stalks, purple stalks, maijiagong, and spotted brocade. The types of weeds occur in late spring and early autumn.

2 Weeds take a long time and there is a clear peak of grass

Generally, the weeds were found around 7 days after the turf was collected from the field, and the grass peak appeared around 15d. The plant height of the grass was significantly higher than that of the turf grass at 20~30d. In the turf fields that are not up to the plain, grass can be grazing in spring, summer and autumn, and the peaks of grassing at the end of spring and autumn are more obvious. The fields that have already become Chengping will also be out of the grass, and there will be two peaks in the late spring and autumn. The monocotyledon turf field is similar to the broadleaf turf field.

3 Weeds occur in large quantities and are harmful

Under natural conditions, monocotyledonous turfgrasses generally have weeds of 30 to 50 plants/m2 and local plants of 100 to 200 plants/m2, mainly grass weeds and sedge weeds. Broad-leaved turf fields generally have weeds of 50 to 60 plants/m2, and severe fields of more than 100 plants/m2, mainly broadleaf weeds. The newly planted turf field has the largest amount of grass; the turf field during the post-shovel regeneration process is conducive to the occurrence of weed sprouting; if the turf field of Chengpingping is poorly maintained, it will cause grass shortage. Weeds in the lawn field mainly affect the overall beauty of the lawn and reduce the sales efficiency. Severe plots will cause grass shortages and the seasons will be scrapped.

Second, the occurrence and distribution of common weeds in the lawn

According to reports, there are 45 families of weeds that harm China's lawns, nearly 450 species, among which the species and quantity of grasses and compositae are the most common, and the damage is also serious, followed by sedge, carp, and large. Weeds of Polygonaceae, Polygonaceae, Leguminosae and Dianthus. Among the 45 families of turf weeds, the weed species and the number of weeds in the above 8 families accounted for 60%-70% of the total weeds, and the remaining 37 families accounted for about 30%-40% of the total weeds. Despite the wide variety of lawn weeds, the types of lawn weeds vary from region to region.

1 Northeast

The northeastern region mainly refers to Liaoning, Heilongjiang and Jilin. The lawn weeds mainly include Mongolian dandelion (TaraxaCUmmong0ficUm), Polygonum aviculare, 1xeris denticulate, Cephalonoplos segetum, Plantago asiatlca. Amaranth (Capsellab Ursapastoris), Erigoroncanadensis, Rorippaislandica, Trigontis peduncularis, Oxalis corniculata, Acalypha australis, Echin0chloaCrusgalli, and crabgrass Digitaria sanguinalli), Artemisia annua

(Artemisia annua), Sonchus brachyotus, Chenopodium album, Amaranthus retroflexus, etc., especially the damage of turf, sorrel, valerian, crabgrass and arbutus Heavier

2 Beijing-Tianjin area

The Beijing-Tianjin region mainly refers to Beijing, Tianjin, Hebei and other places. The lawn weeds mainly include Ixeris chinensis, Xanthium Sibfricum, amaranth, Chinese wolfberry, Chinese cabbage, and summer solstice (Lagopsis).
Supine), Lapidium apelalum, crabgrass, Setaria viridis, Inala japonica, Viala philippiac, Artemisia annua, Sorrel, Potentillasupina, Wei Ixeris chinensis, Convolvulus arvensis, etc., are most seriously endangered by spines, foxtail, stalks, stalks, crabgrass, and dandelion.

3 East China

East China mainly refers to Shanghai, Jiangsu, Zhejiang, Shandong, Anhui, Fujian and other places. See the relevant literature, and combined with the author's 2002-2004 investigation results on the occurrence and damage of lawn weeds in Suzhou and surrounding areas, the lawn weeds there are philoxeroides (Alternantheraphiloxeroide), crabgrass, bermudagrass (Cynodon dactyIon), clover (Trifo zium pretense), day coriander (Hydroctylesibthorpiodes), purple nutsedge (Cyperus rotundus), dandelion, clustered volume ear (Ce ra stfUm ca e spit0 SUm), barnyardgrass (Echinochloa crusgalli), Persian speedwell (Veronicape r ica), iron amaranth, Vetch (ViCia SatfVa), small quinoa
rChenopodium glaucum), Conyza bonarinsis, foxtail, Eleusine indica, kelly (Kyllingabrevifolia), sorrel, amaranth, sedge (Cype rus
Diffomis), Amaranth, Imperata cylindrica1, Conyza Canadensis, Galium aparine, Poa annua, etc., with Alternanthera philoxeroides, crabgrass, Bermudagrass,

White mulberry, clover, scorpion, fragrant aconite, goosegrass, leeches, sorrel, etc. are the most serious damage to the turf.

4 Central China

Central China mainly refers to Hubei, Henan, Hunan and other places, the main lawn weeds bermudagrass, purple nutsedge, crabgrass, Channa intestinal (EC¨P t aP r0 S tra te), goose grass, philoxeroides, Galium Stellaria media, clover, big nest, Veronicadidyma, foxtail, sphagnum, thorn, drowning, small canopy, leeks, Humulus scandens, etc. , Baimao, l-leaf grass, Alternanthera philoxeroides, crabgrass, foxtail, goosegrass and other hazards are heavier."

5 Southwest

The southwestern region mainly refers to Guizhou, Sichuan, Chongqing, Yunnan and other places. The lawn weed species mainly include fragrant aconite, crabgrass, sorrel, sorghum, leeches, sorghum, bluegrass, mother-in-law, leeks, and piglets.殃, 藜, 小藜, foxtail, white stalk, Alternanthera philoxeroides, Goosegrass, Paspalum distichum, Brassica oleracea, dandelion, Dactylis glomerata, etc., with bluegrass, cattle The glutinous grass, horse tang, dandelion, chicken feet, leeks, sorrel, sorghum, fragrant aconite, leeches and other hazards are more serious.

6 South China

South China mainly refers to Guangdong, Guangxi, Hainan and other places. The lawn weeds mainly include leeches, bermudagrass, Viola japonica, Euphorbia hirta, crabgrass, goosegrass, fragrant aconite, and Tianhu.荽, Xiaofei Peng, Alternanthera philoxeroides, leeks, sorrel, Centella asiatica, Gnaphalium affine, Desmodium triflorum, PaspalumCOnjugatum, and leaf beads ( Phyllanthus urinaria), chain pod beans (Alysicarpus vaginelis), rice flatsedge (Cyperus iria), paving millet (Panicum repens), teff (Eragrostia pilosa), Kummerowia (Kummerowia striata), the vehicle in front, plebeia (Sa Zviapiebeia, 1), sputum, etc., in which the crabgrass, fragrant aconite, leeches, scorpion, bluegrass, sorrel, algae lotus, corn grass, two ear grass, etc. are the most serious damage to the turf.

Third, lawn field weed control technology

To control weeds in turf fields, we must start from the prevention of weeds and the elimination of weeds. It is necessary to strengthen the management of the field, promote the growth of turfgrass into a flat, and exert the effect of grass control. In order to remove the weeds in the field in time, it is necessary to use safe and effective medicines to implement the combination of blocking and elimination, and take the comprehensive control approach based on agricultural control and chemical control.

1 Agricultural control measures

Early removal of weeds in the fields and fields, control of weed seeds falling into the fields, and prevention of weeds and stems such as thousands of gold and water peanuts. After shoveling the lawn, timely transplant and fill the gap, and at the same time strengthen field management, improve the coverage of turfgrass, promote the formation of ping, and reduce the number of weeds.

2 Chemical control technology

(1) Soil treatment technology: In the mid-1990s, local grass farmers used rice and wheat herbicides to control weeds in lawn fields. On this basis, in 1998 and 1999, the site conducted trials and demonstrations on the dosage, the method of administration and the appropriate period of medication. The results showed that the monocotyledon turf field was shoveled for 3~5 days, and it was kept moist in the field. It was applied with 18% benzalkonium WP50g/667m2 in spring and summer, and 50% green and green in the autumn with 100g/667m2. Fertilization method can achieve herbicide effect of about 95%, and the effect period is 40~50d. Visual inspection has no obvious effect on turfgrass growth. When planting the fields of Bermuda grass, when using the above two kinds of medicines, it is necessary to pay attention to the appropriate reduction of the amount to prevent the growth of the lawn from being inhibited.

(2) Stem and leaf treatment technology: After the turf is harvested, the soil is not treated in time for soil treatment or treatment, and the effect is not ideal. The weeds grow with the turfgrass, causing the attention of the farmers, most of the weeds have 3~5 leaf stage It can only be supplemented by stem and leaf treatment. For different types of weeds in different turf fields, the station conducted relevant experiments and the results have been applied to production in a large area.

1 Monocotyledon turf field: Control monocotyledon weeds in monocotyledon: Apply 10.8% high-efficiency grass cover 50~60ml/667m2 or 6.9% Hummer 50~60ml/667m2 spray method, herbicidal effect 83~ 95%.

To control broad-leaf weeds in monocotyledon: in the grassy period of grasses, you can use Pingkuojing, 80-120 ml per mu of lawn, 25-30 kg of water; or paraquat and 2 to 4 chlorine. The amount is mixed, or it is better to mix it with the conventional amount of 2 to 4 chlorine.

Control of sedge weeds in grasses: use sassafras, stem and leaf treatment using secondary dilution method, 3-5 leaf weeds, 60g per 660 square meters of lawn water 25-30 kg; 5- 7 leaf stage weeds 80g per 660 square meters of lawn, 25-30 kg of water, good control.

2 broad-leaf turf field: 10.8% efficient grass cover energy 50~60ml/667m2 or 6.9% hummer 50~60ml/667m2 for water spray control of horseshoe golden lawn field monocotyledon weeds with excellent effect, and safe for horseshoe gold Good sex. The main hazard weed in the horseshoe golden lawn is broadleaf grass. The horseshoe net can be used to control the broadleaf weeds in the horseshoe golden lawn. The stem and leaf treatment is used. The curing agent is used for 8-10 grams per 330 square meters. Dilute 15 kg of water, the spray should be meticulous and thoughtful, no heavy spray does not leak.

Fourth, common lawn weed weeding technology