In general, in order to achieve the best herbicidal effect, we must first confirm the type of weeds in the clearing field and the efficacy of the herbicides , and select the correct herbicides. Secondly, we must be based on the age of the grass, Geological and weather conditions, choose the right timing and dosage. Master these aspects, then we will get twice the result with half the effort with the effect of fighting drugs and weeding.
First, the classification and characteristics of common herbicides
1. From the scope of the efficacy of herbicides, herbicides can be divided into selective herbicides (such as Napeng, Benzsulfuron, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4) And two kinds of herbicides (such as glufosinate, paraquat, etc.).
The difference in efficacy: selective herbicides only have effects on weeds in the scope of application, and the herbicides are generally known as: killing green, killing which plant, spraying the plant, regardless of the plant Weeds are still crops, all of which have a killing effect.
2, from the herbicide in the movement of plants, herbicides can be divided into contact herbicides (such as herbicide ether, oxacillin, chlorpyrifos, paraquat, etc.), systemic herbicides (such as grass Phosphate, chlorpyrifos, 2,4 drops of butyl ester, etc., and a comprehensive herbicide (such as herbicide, etc.) that has the dual effects of contact and systemic conduction.
The difference in efficacy: the contact-type herbicide can only kill the weed parts that the liquid is exposed to. The parts where the weeds are not sprayed and the underground part have no effect, and must be sprayed evenly when used; and the internal absorption type After the herbicide is applied, the liquid can be absorbed into the body by the roots and leaves of the weeds, and then transported to various parts of the whole plant body, and the weeds are dried and killed by destroying the physiological balance and internal structure of the weeds; The systemic herbicide has all of the above effects. The contact-killing effect is fast (effective in 1-2 days or even a few hours), and the internal conduction-absorbing type is slower (5-7 days effective).
3, from the use of herbicides, herbicides can be divided into stem and leaf treatment agents (such as glyphosate, grass can, 2,4 drops of butyl ester, etc.), soil treatment agents (such as acetochlor, West Majin, alachlor, trifluralin, etc., as well as agents that have both the treatment of stems and leaves and soil (such as atrazine).
The difference in efficacy: the stem and leaf treatment agent is used for spraying, the soil treatment agent is used for spraying the surface or the mixed soil, and the stems and leaves and the soil treatment agent can be sprayed with the plant, sprayed or applied. Used on the surface.
4, from the chemical structure of herbicides, herbicides can be divided into inorganic compound herbicides (such as copper sulfate, potassium chlorate, etc.) and organic compound herbicides (such as ethers, phenols, pyrazoles, organic phosphorus, etc. Common drugs are glyphosate, chlorpyrifos, 2, 4, 4, chlorhexidine, fruit, sodium pentachlorophenol, and cable.
When you choose herbicides, you can choose the right one according to your field weeding needs.
Second, ten kinds of commonly used herbicides for weed species introduction
1. Butachlor: Herbaceous weeds, annual sedges, such as valerian, thousand gold, sedge, broken sedge, cattle felt, ragweed, squash, cuspidate and squid , annual broadleaf weeds, have a good control effect.
2, acetochlor: alfalfa, ragweed, sedge grass and other annual grasses, some broad-leaved weeds, have a good control effect.
3. Acetochlor: It has good control effect on alfalfa, water leek, calf, ragweed, oxweed, thousand gold, squash, sedge, and sorghum.
4, bentazon: on water sedge, shaped sedge, broken sedge, squid, ox, grass, dwarf mushroom, wild sage, Alisma, sylvestris, ragweed, section vegetables, Mo Shang Weeds such as vegetables, water leek, and sausages have good control effects.
5, 2, 4-butyl butyl ester: for the control of broadleaf weeds such as ragwort, wild sage, and weeds such as striated grass, oxweed, etc., have better control effect.
6, 2 methyl 4-chlorosodium: mainly control amaranth, sedge, Jing Sanling, stalk sedge, ragweed, oxweed, wild sage, dwarf mushroom, wild scorpion, four leaf ping, eye dish, water leek , section dishes, etc.
7. Pyrazosulfuron-methyl: mainly for controlling ragweed, cultivar, kohlrabi, dwarf mushroom, cress, diarrhea, water dragon, green ping, sedge, water sedge, cattle grass, firefly, Broad-leaved weeds and sedge weeds such as calves, alfalfa and broccoli.
8, cyclamate: the main control rain long flower, eye dish, ragweed, section vegetables, valerian, Alisma, sage, Mo Shang, cuspid flower, wild sage, wolf grass, shaped sand Weeds such as grass, sedge, cow felt, broken sedge, firefly, water cotton, and small algae.
9, rushing grass net: mainly control eye vegetables, ragwort, oxweed, section vegetables, valerian, four leaves Ping, wild sage, shaped sedge, algae and so on.
10, enemy cockroaches: the main control of valerian, at the same time for the prevention and control of water purslane, ragwort and dry field crabgrass, foxtail, wild carp and other seedlings also have a good effect.
The above are some commonly used herbicide types, which basically cover the common weed types in the field. You can use them according to the types of weeds in your field.
Third, the best timing and method of application of herbicides
The time, temperature, humidity, wind size, soil geology, light intensity, PH pH and water quality of the medication will directly affect the use of herbicides, and these factors are not well mastered, the most critical factors It is time, humidity, temperature, wind and rain, let's talk about it one by one.
1. The best drug temperature: the use effect of herbicide is proportional to the temperature. The higher the temperature, the stronger the weed absorption and loosening ability in the body, the higher the herbicide activity, the better the weeding effect, and the low temperature is just the same. On the contrary, in the low temperature, the detoxification effect of the crop body is relatively slow, and it is easy to cause phytotoxicity. In general, it is best to use the herbicide at an optimum temperature of 20-35 degrees and 25 degrees.
2, the best medication humidity: humidity on the herbicide effect is also very obvious, generally in the air humidity of more than 60%, the best use of herbicides. When the air humidity is high, the herbicide sprayed onto the weed plants will stay for a long time without being evaporated, which can make the weed leaf surface pores absorb the liquid more fully, and play a better herbicidal effect; the herbicide is used. After the soil, the soil moisture is relatively large, and the liquid will be transported to the various parts of the ground weed plant body with a large amount of water absorption from the root system, which can better inhibit photosynthesis and destroy the internal structure of the weeds, thereby achieving better herbicidal effects. It can be said that the higher the humidity, the better the weeding effect, and the worse the effect of the humidity at the end of the month. Especially in the dry weather, the weeds in order to preserve the water, the wax of most weeds will become thicker and reduce the transpiration, while the respiratory function and The absorption function will also be reduced simultaneously, which will greatly reduce the absorption of herbicides by weeds and reduce the herbicidal effect. It is recommended that when using drugs in dry weather, while increasing the water consumption, some penetrants may be appropriately blended in the herbicide to achieve better herbicidal effects.
3, wind and rain affect the efficacy: the wind in the larger weather should not spray herbicides, when the wind speed reaches 8-10 meters per second and above, the herbicide efficacy will be reduced by more than 5%, and in the windy weather, also It is easy to cause the medicine mist to drift to the crop and cause phytotoxicity. The rainy weather of 10-15 mm in rainfall is actually beneficial to improve the efficacy, because the right amount of rainwater can not only make the weeds absorb more liquids because of rapid germination, but also accelerate the spread of herbicides; However, heavy rain will wash away the liquid on the weeds, so that the efficacy is reduced. Generally, concentrated rain occurs six hours after the fight, and the drug should be re-patented after the rain. In the usual fight, in order to improve the efficacy of herbicides, it is best to carry out in sunny and windless weather. It is not recommended to fight in rainy weather.
4, the impact of grass age on the effect: the greater the weed age, the thicker the leaves, the more waxy, the stronger the resistance to herbicides, and the shorter grass young grasses have lower self-protection ability, medication The effect is more obvious. In general, herbicides can be used to achieve optimal herbicidal effects when weeding in the field.
5, the best medication time: whether it is insects, germs, or plant metabolism activities, 20-30 degrees are their most active temperature environment, corresponding to the daytime time is usually 9-11 am and 3 pm - At 5 o'clock, all said that it is generally best to fight herbicides and kill insects at around 10 am and 4 pm. If it is divided into four seasons, in the cool season of spring and autumn, it is best to fight drugs at 10-11 am and 2-3 pm, and in the hot season in summer, it is best to fight drugs before 10 am and after 4 pm. Winter crops are basically free of medicine, but for winter greenhouses, you can choose to spray in the morning or at noon in a sunny or sunny day.
Fourth, other considerations for the use of herbicides
1. Long-term use of a single herbicide will result in strong adaptability and resistance to weeds. It is recommended to use different drugs alternately.
2. The content of sandy soil organic matter is small, and the ability of soil to adsorb herbicides is poor. The dosage should be appropriately reduced to avoid harming the roots of crops; the soil with high viscosity and high organic matter has strong ability to adsorb herbicides, and the solution is not easy to be in soil. Diffusion movement, easy to cause a patchy soil layer, can increase the amount of drug in the case of medication; for water fertilizer fields with very high organic matter content, it is best not to use soil treatment agent herbicides.
3. Some herbicides with long-lasting effects on the drug will have a certain impact on the crops. We must pay attention to it when using it. Such as chlorsulfuron, metsulfuron, ethametsulfuron, chlorsulfuron (beansulfuron), chlorhexidine, chlorhexidine, atrazine and so on.
4, the last point, but also the most important point: when using the drug, must be strictly in accordance with the dosage and concentration of the herbicide instructions, should not be allowed to increase the amount or concentration of drugs to avoid phytotoxicity. It is better to use a low concentration or a small amount of a few times, and it is not necessary to overdo it once.
Aluminum Coil i is disposed rolling and bengding angle. Aluminum coil is widly used. The checker plate includes various kinds of tread.Normally there are big five bar,small five bar,two bar,stucco,,pointer,diamond and so on.Five bar Aluminum Sheet with great antiskid property and widly used on the floor.
The surface of aluminium sheets can be treated as smooth,or big five bar, small five bar, two bar, diamond or needle embossed. And also can be mill finish or bright finish The width is from 1000mm to 9000mm and the length is from 2000mm to 6000mm. We can also cut according to customers' special demands.The temper of the alloy is HO H12 H14 H22 H24 H18 H32. The payment we can accept include 30%T/T as deposit and the balance after the receipt the copy of the B/L.
Embossed Aluminum Coil,Stucco Embossed Aluminum Sheet,Aluminum Tread Coill,Embossed Stucco Aluminum Coil
Henan Everwin Trade Co., Ltd. , https://www.ewaluminium.com