How to chemically weed the apple orchard and pear garden
1. Glyphosate: This type of herbicide is a non-productive, internal-absorption, conductive herbicide. It is low-toxic and is widely used in gardens and farmland. It is mainly absorbed through the stems and leaves of weeds and transmits the whole plant, causing the weeds to die. It is used to control all kinds of 1-year-old monocotyledonous and dicotyledonous weeds, and it is an excellent agent for eradicating perennial weeds, such as thatch, reed, spiny, Pinellia, and some small shrubs such as wild jujube and vitex. And so on, can kill. The commonly used formulations of glyphosate herbicides include 10% glyphosate (produced by Sanlong, Hubei) and 41% of Roundup (DuPont).
2, Paraquat: Moderate toxicity, this agent is a contact killing herbicide. The effect is rapid and it does not affect the efficacy of the drug after half an hour of rain. Many kinds of annual weeds in orchards have good control effects. For perennial weeds, only the above ground parts can be killed. Commonly used formulations include 20% paraquat in water (produced by Hubei Jiangmen Pesticide Factory) and 20% in trace water (British Reliance).
3, E-A mixture: from acetochlor and atrazine mix, also known as B-water sulfation emulsion. By the weeds, young shoots and larvae, etc. are absorbed, the weeds shoots and young roots stop growing and die. Kill the grass well. Effectively control the grasses and broad-leaved weeds that have been propagated by seeds for 1 year, such as green foxtail, crabgrass, goosegrass, alfalfa, cockroach, quail, etc., and their drug efficacy lasted for half a year. Common dosage forms of 40% acetamidine water suspoemulsion (produced by Hebei Xuanhua Pesticide Factory) and 28% acetaminophen water suspension (Jinan Greenfield).
Herbicide Use Considerations
1. See Herbicides: There are many kinds of herbicides and they have different effects. When herbicides are applied in orchards, they are first selected according to the type of weeds in the orchard and the season when herbicides are sprayed. When most of the orchards contain one-year-old grass weeds, spraying et al. will be sprayed before the spring sprouts or before the weeds three-leaf stage; if there are perennial weeds in the garden, they can be sprayed with glyphosate during their vigorous growth period. Only in this way can we achieve a more effective weeding effect.
2, spraying requirements: (1) according to climate conditions, select the appropriate concentration of uniform and fine spray on the weed stems and leaves (before weed spray evenly on the soil surface). (2) Avoid spray on the crop stems and leaves when spraying, install the protective cover and directional spray above the spray head. (3) spraying to avoid the high temperature period at noon, add detergent, spreading agents and other penetrants to facilitate the absorption of herbicides. (4) Pay attention to labor protection and avoid drug poisoning.
3. After spraying, clean the spraying tool in time to avoid phytotoxicity to other crops.
4, pay attention to climate change, spray heavy rain after spraying.
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