Recently, some readers consulted on the problem of weeding in Chinese herbal medicine fields. There were also group of friends in the "earth harvest" group. For this reason, the author briefly introduced the herbal herbicides. Herbicide herbicides are mainly divided into pre-emergence and post-emergence.
I. Pre-emergence herbicides for Chinese herbal medicines
Both pre-seedicide herbicides and pre-emergence herbicides were used as landfills.
1. Trifluralin is commonly used as a pre-herbicide. Can effectively remove the crabgrass, Setaria, tendon, purslane, valerian, etc., on the general dicotyledonous and monocotyledonous weeds have a strong lethal. Pay attention to the general spray a few days before sowing, so as not to harm plant germs. The drug is volatile and decomposable, and soil should be mixed in time after spraying. Trifluralin is not effective against weeds and perennial weeds that are excavated. Wheat, sorghum, spinach, and sugar beet fields are not suitable for use. Spraying around fish ponds is strictly prohibited and long-term use is not allowed. All kinds of common Chinese medicinal materials are available, but the habitat is forbidden. Dry Pinellia and Southern Star can be used for irrigation.
2. Post-emergence herbicides are generally used in penicillin. Spraying can be done after sowing, no soil mixing, good sealing effect. General Chinese herbal medicine varieties, such as Atractylodes macrocephala, woody yam, yam, licorice root, Adenophora spp., Radix Paeoniae alba, wind shield, stem dry, Radix Isatidis, Radix Scutellariae, Anemarrhenae, Radix Astragali, Radix Astragali, Achyranthes bidentata, Pinellia, Campanulaceae, Polygalaceae, Bupleurum, dandelion, Celosia, Salvia, etc. are available. Can effectively control annual grass weeds and some broad-leaved weeds. Note that only once per season crop is used.
Second, herbicide post-emergence herbicides
1. General herbicide is quizalofop. All kinds of common Chinese medicinal materials are available, and they are used after the Chinese medicinal materials grow out of true leaves. The efficacy is fast and long-lasting, and there is no effect of rain or cold at 1 to 2 hours after application. It can control annual grass weeds such as crabgrass, green foxtail, wild oats and bromegrass, and it can be degraded quickly in the soil, and has no effect on post-planting crops.
2. Herbal herbicides are available in the following categories. (1) Leguminous herbs herbicides. It is suitable for Chinese herbal medicine fields such as astragalus, licorice, clover, turfgrass, cassia seed, puerarin, sophora flavescens, sand aconite. It can control annual weeds and broad-leaved weeds in the Chinese herbal medicine field of leguminous plants and is suitable for weed control in leguminous herbal medicine bases where planting density is high and manual weeding is difficult. Because the leguminous plants germinated earlier, weeding and post-emergence weeding basically required the weeds to be produced, and weeds were best sprayed at the 2 to 4 leaf stage. (2) Herbicides for Umbelliferae herbal medicines. It is suitable for Chinese medicinal materials, such as peony root, Cnidium monnieri, Bupleurum chinense, windproof, Chuanxiong, Chinese angelica root, alfalfa live, fennel, and North Adenophora. The Umbelliferae plant germinates earlier, and the post-emergence weeding also requires the best spraying at the 2 to 4 leaf stage of the weed growth season. (3) Lamiaceae herbicides for herbicides. It is suitable for Chinese herbal medicine fields such as Astragalus, Nepeta, Musk, Salvia, Lavender, Sage, Prunella vulgaris, and Scutellaria barbata. It can prevent the annual grass weeds, broad-leaved weeds, sedge weeds and some perennial weeds in the labiatae herbal field. Each bag has 15 kilograms of water and sprays half a mu of land. The best direct seeding field is 3 to 5 leaf stage and weed 2 to 4 leaf stage field spray. (4) Post-emergence herbicides in the Chinese herbal medicine of Compositae. Suitable for Atractylodes macrocephala, chrysanthemum, atractylodes, milk thistle, coltsfoot, dandelion and other Chinese herbal medicine fields. There are special effects on purslane, iron amaranth, and grayish grey dishes. The best direct seeding field is 6-8 leaf stage, weeds 2 to 4 full field sprays. After the transplanting field survived, the condition of weeds was the best at the bottom of the ridge. In case of drought, low temperature and other adverse conditions, the amount can be increased. Do not use under high temperature, low temperature or drought. In addition, there are special herbicides such as Liliaceae, Paeonifloraceae, Nanxing Branch, Banlangen, Codonopsis, Campanulaceae.
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