Acetochlor
English common name pretilachlor
Other names Sofit
toxicity
Low toxicity to humans and animals, the oral LD50 of rats is 6099 mg / kg, acute percutaneous LD50> 3100 mg / kg, fish poison is higher, carp LC50 is 9.8 mg / kg.
Formulation 30% emulsifiable concentrate.
Characteristic is high
°C Selective herbicide for rice fields. It is safe for rice and has a wide spectrum of killing grass. Weed seeds absorb the medicinal agent during germination and the roots are poorly absorbed. It can only be used for pre-emergence soil treatment. The germination period of rice is also sensitive to pretilachlor. To ensure the safety of early administration, pretilachlor is often added to the safety agent Cg A123407.
Scope of application
Applicable to rice control for alfalfa, bald oyster, thousand gold, goosegrass, cow felt, narrow leaf diarrhea, water leek, shaped grass, broken rice sedge, clove stalk, ragweed, etc. 1 year old grass undergraduate and broad Leaf weeds.
Instructions
In the water live field and the use of the field, first well, and then germination sowing. 2-4 days after sowing, fill the shallow water layer, use 100-115 ml of 30% emulsifiable concentrate per acre, spray evenly 30 kg of water or 20 kg of mixed tidal soil or spread the whole field, and keep the water layer for 3-4 days.
Precautions
1. After the ground is well prepared, it is necessary to sow and use the medicine in time, otherwise the weeds will be unearthed and affect the efficacy.
2. The sowing rice has root buds normal. Avoid buds without roots.
3. In the northern rice area, the application period should be extended appropriately, first test, and then promoted in large areas to avoid phytotoxicity.
Quinclorac
English common name quinclorac
CAS: 84087-01-4
Other names are killing, killing, killing, Facet, BAS-51406-H.
Nature: colorless crystal. The temperature of 274 ° C. Vapor pressure <0.01 mPa (20 ° C). Solubility at 20 ° C: Water 0.065 mg/kg (pH 7) was dissolved in acetone, ethanol, and ethyl acetate.
Toxicity is a low toxicity herbicide. The acute oral LD502680 mg/kg in rats and the percutaneous transdermal LD50>2000 mg/kg in rats. Acute inhalation LC50
(4 hours) > 5.2 mg / liter, fish, bees are non-toxic.
Formulation 25%, 50% wettable powder.
Characteristics
It is a hormone-type quinoline carboxylic acid herbicide. The symptoms of weed poisoning are similar to those of auxin. It is mainly used for controlling valerian and has a long pot life. It is effective in 1-7 leaf stage. Rice is safe.
The scope of application is mainly used for rice field alfalfa. It can also control rain long flowers, Tian Jing, cress, ragweed, and saponin.
Instructions
1. Insert the scutellaria sinensis 1-7 leaf stage can be applied, use 13.5-26 grams of active ingredient per mu, spray, drain the water before the medicine, release the water back to the field after the medicine, and keep the water layer 3-5cm.
2. After the live seedling stage 2.5 leaf stage, the dosage is the same as above.
Precautions
1. The residual amount in the soil is large, and it is easy to produce phytotoxicity to the sputum. The sorghum can be used to grow rice, corn, and sorghum.
2. Solanaceae (tobacco, potato, pepper, etc.), Umbelliferae (carrot, celery), Polygonaceae (spinach, beet) Malvaceae, Cucurbitaceae (various melons), Leguminosae, Compositae, Rotaceae Flower crops are sensitive to the drug.
3. Can be mixed with chlorpyrifos, bensulfuron-methyl, enemies, etc.
Butachlor
Butachlor
Also known as chlorpyrifos, dechlorin.
Pharmacy characteristics
The herbamine is an amide selective systemic herbicide. Pure product is a light yellow oily liquid with a slightly aromatic taste. Hard to dissolve in water, soluble in a variety of organic solvents. It is chemically stable under normal temperature and neutral and weak alkaline conditions. It will accelerate its decomposition under strong acid conditions and can be degraded in the soil. It is low in toxicity to humans and animals, irritating to skin and eyes, and highly toxic to fish. Butachlor is mainly absorbed by the weeds of weeds, and then acts to transmit whole plants. Both pre-emergence and seedling can be used. After the plant absorbs butachlor, it inhibits and destroys the protease in the body, affects the formation of protein, inhibits the normal growth and development of weed shoots and radicles, and causes the weeds to die. It is used on clay loam and soil with high organic matter content. The agent can be absorbed by soil colloid and is not easy to be leached. The special effect period can reach 1-2 months.
Main dosage form
60% cream, 5% granules.
Control object and method of use
Application in dry field requires application under soil wetting conditions. It can prevent annual grass weeds and some dicotyledon weeds such as valerian, crabgrass, foxtail, oxweed, ragweed, sage, and shaped grass. It is suitable for weeding in cabbage, bean, radish, cabbage, solanaceous, spinach and other vegetable fields.
(l) Weeding in the live vegetable fields such as kidney beans, cowpeas, cabbage, fennel, nursery cabbage, spinach, etc. Before planting, use 60% emulsifiable concentrate 100 ml, 40-50 kg of water, evenly spray the noodles, and then sow.
(2) Cauliflower, cabbage, eggplant, sweet (spicy) pepper, tomatoes and other transplanted fields, 150 grams of 60% emulsifiable concentrate, 50 kg of water before the planting, evenly spray the soil.
Precautions
(l) This product has good control effect on weeds before excavation, and the effect of large grass is poor. It should be applied before planting and planting.
(2) The use of butachlor has a good effect when the soil has a certain temperature. Dry fields should be watered or sprayed before application to improve the efficacy.
(3) During the sowing period of melons and solanaceous vegetables, there is a certain phytotoxicity in the use of this product, and should be used with caution.
(4) This product mainly kills monocotyledonous weeds, which is ineffective or less effective for most broad-leaved weeds. For plots with more broadleaf weeds in vegetable fields, consider using other herbicides.
(5) Spraying should strive to be uniform, to prevent excessive drug use caused by local medication, or leakage.
Grass
English generic name prometryn
Other names are esa ard, Caparol, gram 34161, Mekazin, Selektin.
toxicity
Low toxicity to humans and animals. The oral acute LD50 of rats was 3150-3750 mg/kg. The acute LD50 of rabbits percutaneous was >10200 mg/kg. The no-effect dose for rats is 1250 mg / kg, which is low toxicity to birds, bees and moderate to fish.
Formulation 50%, 80% wettable powder.
Characteristics
Hard to dissolve in water, soluble in organic solvents. It is a systemic selective herbicide. It can be absorbed and transmitted through roots and leaves. It has the best control effect on newly germinated weeds, and has a wide range of herbicides, which can prevent annual grass weeds and broadleaf weeds.
Scope of application
Applicable to cotton , soybean, wheat, peanut, sunflower, potato, fruit tree, vegetable, tea tree and paddy field to control valerian, crabgrass, ginseng, wild leeks, medlar, medlar, purslane, maiden, vegetal 1 year old grasses and broadleaf grasses such as plantain.
Instructions
1. Use in dry fields
Before planting cotton before sowing or after sowing, use 50% WP of 100-150 g per mu or 100% of Fluorine Emulsiol 100 ml per acre and 100 g of 50% WP WP, 30 kg of water. Evenly sprayed on the surface, or evenly mixed with 20 kg of fine soil, and then mixed soil 3cm deep, can effectively prevent 1 year old single, dicotyledon weeds.
Peanuts, soybeans, before planting or after sowing, use 50% of the wettable powder 100-150 grams per acre, 30 kilograms of water, evenly spray the soil surface.
Before the seedlings are planted, 50 grams of 50% wettable powder per acre, 30 kilograms of water, and soil spray.
Wheat field in the 2-3 leaf stage of wheat seedlings, weeds 1-2 leaf stage, using 50% wettable powder 75-100 grams per acre, 30-50 kg of water, spray treatment of stems and leaves, can prevent stagnation, see wheat Mother and other weeds.
Carrots, celery, garlic, onions, leeks, fennel, etc., before planting or after sowing, use 100g of 50% wettable powder per acre, evenly spray 50 kg of water on the soil, or use 50% of grass per acre. 50 g of wettable powder and 200 ml of 25% herbicidal ether emulsifiable concentrate are used for better effect.
2. Use of fruit trees , tea gardens, and mulberry gardens
In the early stage of large-scale germination of 1-year-old weeds, under the condition of moist soil, 50-100% wettable powder is used in an amount of 250-300 g per acre, and the amount used alone or in half is mixed with the cable, butachlor, etc. . 5-7 days after rice transplanting in rice fields, use 50% wettable powder 20-40 g per acre, or 50% chlorpyrifos WP and 25% herbicide ether wettable powder 400 g, mix wet sand 20 Mix about kilograms, mix well, and spread the whole field evenly after the rice leaves are dried. When applying the medicine, keep 3-5cm shallow water layer in the field, and keep water for 7-10 days after application. 20-25 days after transplanting rice, when the leaves of the leaves of the eyes turn from red to green, 65-100 grams of 50% wettable powder per acre in the north, 25-50 grams in the south, and 20-30 kg of wet fine soil. . The water layer remains the same as before.
Precautions
1. Strictly control the amount of application and the time of application, otherwise it will easily cause phytotoxicity.
2. Sand and soil with low organic matter content are prone to phytotoxicity and should not be used.
3. Do not loosen the soil or sputum half a month after the application, so as not to damage the drug layer and affect the efficacy.
4. Spray equipment should be cleaned after use.
Oxazone
English common name Oxadiazon
Other names are Cao Cao Ling, Nong Si (Ronstar)
toxicity
Low toxicity to humans and animals. The acute oral LD50 of rats was >8000 mg/kg. Acute percutaneous LD50>8000 mg / kg, low toxicity to birds and bees. Fish poison is medium.
Formulation 12%, 25% emulsifiable concentrate.
Characteristics
It is a selective pre-emergence and post-emergence herbicide. Mainly absorbed by weed sprouts or stems and leaves. The weeds in the germination period have the best effect, and the effect decreases with the growth of weeds, which is basically ineffective for adult weeds.
Scope of application
Applicable to rice, soybean, cotton, sugar cane and other crops and orchards to control weeds, ginseng, gar, sedge, sphagnum, ragweed, turfgrass, sorghum, and scorpion, scorpion, large One-year-old grasses such as Polygonaceae, Oxalis, and Convolvulaceae use broadleaf weeds.
Instructions
Rice field
Dry rice, dry rice water irrigation live field, before planting, 10-100% emulsified milk per acre, 50 kg of water, evenly sprayed soil surface. After the Putian and the water live field are generally well-grounded, it is best to use the muddy water in the field, use 100-150 ml of 12% emulsifiable concentrate per acre, 25 kg of water, and spray the whole field. Keep the water layer for 2-3 days, soak it after draining. Can also be used in the seedling 1 leaf 1 heart to 2 leaf stage, with 12% emulsifiable concentrate per acre
100 ml, evenly spray 30 kg of water on the whole field, and keep the shallow water layer for 3 days.
The transplanted field can be used for 1-2 days before rice transplanting or 4-5 days after transplanting, using 12% emulsifiable concentrate 125-150 ml per acre, and then applied in the original bottle, and kept the shallow layer for 3 days after application. Naturally dried. Normal management later.
2. Before the seedlings are planted in peanuts and cotton fields, use 25-100 ml of 25% emulsifiable concentrate per acre, 35 kg of water, and spray the soil surface evenly.
Precautions
1. Germination and sowing of the field must be applied 2-3 days before sowing, such as immediately after sowing, it is prone to phytotoxicity.
2. Use in dry fields, the soil should be kept moist, otherwise the efficacy can not be exerted.
3. Spray equipment should be cleaned when used.
Dur
Metolachlor
English name: METOLACHLOR
Molecular formula: C15H22ClNO2
Molecular weight: 283.8
Structure:
Metolachlor is an amide herbicide.
Product Name: dul (dual),
Chemical name: 2-ethyl-6-methyl-N(1'-methyl-2'-methoxyethyl) chloroacetanilide [2-ethyl-6-methyl-N-
(1'-methyl-2'-methoxy-ethyl)chloroacetanilide].
1 Overview
Metolachlor is mainly absorbed by the shoots and conducts upward, inhibiting the growth of shoots and roots. The mechanism of action mainly inhibits the protein synthesis of the germinating seeds, and secondly inhibits the infiltration of choline into the phospholipids and interferes with the formation of lecithin. Because the ability of grass weeds to absorb metolachlor is stronger than that of broadleaf weeds, the effect of this herb on weed control is far better than that of broadleaf weeds.
According to China's pesticide toxicity grading standards, metolachlor is a low-toxic herbicide. The acute oral LD50 of the original drug rat is 2780
Mg/kg, the acute percutaneous LD50 of the original drug rats was >3170 mg/kg. It has no stimulating effect on rabbit eyes and has a slight stimulating effect on rabbit skin. Under the experimental conditions, there is no teratogenic, mutagenic or carcinogenic effect on animals.
Metolachlor is toxic to fish under laboratory conditions, low toxicity to birds, stomach poison to bees, and non-contact toxicity.
2. Nature
The pure product is a colorless liquid with a specific gravity (20 ° C) of 1.12, a boiling point of 100 ° C, and a flash point of 110 to 180 ° C. It has a solubility of 530mg/kg (20°C) in water and is miscible with most organic solvents. It has a stable storage period of more than two years at room temperature.
Duer 72% emulsifiable concentrate is a brownish yellow liquid with good emulsifying properties. It can be mixed with many herbicides and has a storage stability at room temperature for more than two years.
3. Use
Metolachlor is applied to dryland crops, vegetable crops, orchards and nurseries. It can prevent annual grass weeds such as goosegrass, crabgrass, foxtail, cotton grass, and broadleaf weeds such as amaranth and purslane. Mi Sha grass, oil sedge.
4. Inspection method
The content of the active ingredient of the imported Duer 72% emulsifiable concentrate can be determined by gas chromatography. The metolachlor standard and the sample were dissolved in an internal standard solution (octadecylchloroform solution) using 4.5% OV-
225/Chromosorb WHP (80-100 mesh) glass column (
3mm × 1m) separation, using nitrogen as carrier gas, using FID detection, first based on the chromatographic peak area of ​​the standard and internal standard and the quality of the standard to determine the correction factor, and then according to the chromatographic peak area of ​​the sample and internal standard and the sample The mass is calculated as the active ingredient content.
5. Other introduction
Duer is a broad-spectrum post-emergence herbicide. For a variety of crops such as: soybeans, corn, cotton, peanuts, potatoes, cabbage, spinach, garlic, solanaceous vegetables and orchards, nurseries.
Its function characteristics: Duer mainly conducts upward conduction through the hypocotyl of the plant's young shoots, namely monocotyledonous and coleoptile, and dicotyledonous plants. After emergence, the roots are mainly absorbed by the roots to inhibit the growth of the shoots and roots. If the soil moisture is good, the weeds are killed in the bud stage; if the soil moisture is small, the weeds are excreted and the soil moisture increases with the rainfall, and the weeds absorb the turf and shrink the whole plant. Therefore, the application should be carried out before weeds are germinated.
Pharmacy characteristics
Duer is an acid amine selective herbicide. Pure product is a colorless liquid, odorless, soluble in most organic solvents, partially soluble in water above 20 °C. Low toxicity to humans and animals.
Dole is a selective pre-emergence soil treatment agent. Monocotyledonous weeds are mainly absorbed by the shoots in the upper part of the seed; the dicotyledonous weeds can be absorbed by the shoots and roots, inhibiting the decomposition of proteins. The soil has a shelf life of 20-50 days.
Main dosage form
5%, 72% emulsifiable concentrate.
Control object and method of use
Duer can prevent annual weeds such as alfalfa, crabgrass, foxtail, and teff, as well as broadleaf weeds such as purslane, scorpion and scorpion. It is suitable for weeding in vegetable fields such as potato, cruciferous, watermelon and solanaceae vegetables.
(l) Live sweet pepper, cabbage, radish, radish, Chinese cabbage, Chinese cabbage, rapeseed, watermelon, broccoli and other vegetable fields weeding, after sowing to the emergence of seedlings, 100 grams of 72% emulsifiable concentrate, spray with water Treat the soil.
(2) Transplanting vegetable fields, such as cabbage, broccoli, sweet (spicy) pepper, etc. After transplanting the seedlings, 100 g of 72% emulsifiable concentrate is used in the mu, and the water is sprayed with water to treat the soil.
Precautions
(l) When the concentration of melons and solanaceous vegetables is high, it is easy to cause phytotoxicity, and caution should be applied when applying the medicine.
(2) The efficacy of the drug is susceptible to temperature and soil fertility conditions. When the temperature is high, the amount of the sandy soil should be low; on the contrary, when the temperature is low, the amount of the clay soil can be appropriately high.
Bensulfuron
English common name bensulfuronmethyl
Other names of Landmark (Londax)
toxicity
Low toxicity to humans and animals. Acute oral LD50>5000 mg/kg in rats and acute percutaneous LD50>2000 mg/kg in rabbits. Fish poison is small, low toxicity to birds and bees.
Formulation 10% wettable powder.
Characteristics
It is a selective systemic herbicide for rice field. It can effectively control 1-year-old and perennial broad-leaved weeds and sedges, which can be absorbed by weed roots and leaves and transmitted to other parts. For rice safety, the method of use is flexible.
The scope of application is applicable to rice fields to control 1-year-old and perennial broad-leaved weeds and sedges.
Instructions
1. Rice field and live field
After sowing, it can be applied to the weeds within 2 leaf stage. Control 1 year old broadleaf weeds and sand grass, use 20% wettable powder 20-30g per acre, spray 30kg of water or 20kg of mixed tidal soil. Keep the water layer 3-5cm for 3-4 days.
2. Rice transplanting fields
It can be used for 3 weeks before and after transplanting, but it is better to apply it 5-7 days after transplanting. Use 10-30 grams of 10% wettable powder per acre to prevent perennial weeds and remove valerian, and the dosage can be increased to 30-50 grams. The water-repellent layer is applied 5cm, which can be sprayed on water or mixed with fine soil. The water layer can be kept for 3-4 days and naturally dried.
Precautions
1. Bensulfuron-methyl has a good effect on weeds within 2 leaf stage, and the effect is more than 3 leaves.
2, the effect of valerian is poor, the sedge of sedge is not suitable for use.
3. Rinse the spray device after use.
Alachlor
English common name alachlor
Other names: cable, Otras, grass, green, Lasso, CP50144, La20
toxicity
Low toxicity to humans and animals, the acute oral LD50 of rats is 930 mg / kg, and the acute percutaneous LD50 of rabbits is 13300 mg / kg, which has a stimulating effect on eyes and skin.
Formulation 48% emulsifiable concentrate, 15% granules.
Characteristics
It is a selective pre-emergence herbicide, mainly absorbed by the spores of weeds, and the roots and seeds can also be absorbed in small amounts. It mainly kills the weeds that germinate in the soil before emergence, and is ineffective for the weeds that have been unearthed. It can be easily absorbed by soil aggregates and is not easy to be volatilized, but it can be decomposed by soil microorganisms. The validity period is about 35 days.
Scope of application
Applicable to crop fields such as soybean, corn, peanut , cotton, potato, sugar cane, rapeseed, etc., control of valerian, crabgrass, valerian, foxtail, autumn scorpion, arm-shaped grass, purslane, medlar, rotundous corn grass, alfalfa , 1 year old grass weeds and broadleaf weeds. There is also a certain effect on the dodder.
Instructions
1. Use on corn, cotton, and peanut ground. Generally, before emergence, the seedlings should be used with 48% or 250 ml of 48% emulsifiable concentrate per acre, and about 35 kg of water.
2. Used in soybean fields, 48% per mu before emergence after sowing
200-300 ml of emulsifiable concentrate, 35 kg of water, evenly sprayed the soil surface. It is used to prevent soybean stalks. Generally, before and after soybean emergence, the stalks of soybeans entangled with medlar can better prevent medlar and are safe for soybeans.
3. For weeding in vegetable fields such as tomatoes, peppers, onions, radishes, etc.
Before sowing or before transplanting, use 42% of alachlor emulsifiable concentrate per acre, 40-50 kg of water, spray the soil surface evenly, sown or transplant with shallow soil, and cover the mulch after application. The dosage should be appropriately reduced by 1/3-1/2.
Precautions
1. Alachlor is poorly water-soluble. If there is no irrigation condition in dry weather, the mixed soil method before sowing should be used. Otherwise the efficacy is difficult to play.
2. Alachlor is not effective for the weeds that have been unearthed. It should be noted that the weed seeds can be germinated at the peak without spraying before the maximum efficacy.
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