There are a lot of weeds growing in the konjac field, which herbicides are effective to use?

In the case of soil-sealing herbicides, it is better not to plant seed vegetables. Because the newly unearthed vegetables will weaken, and the weakening will last for a long time, affecting the next batch of crops for selective herbicides, if it is not the vegetables you planted, you can choose the vegetables of the day. The herbicides for the types of vegetables you grow can't be planted until they're out of effect.

For inactive herbicides, it is decided according to the main ingredients. There is no systemic nature, as long as a few hours to a few days are fine. If there is systemic activity, it is best to wait more than two weeks.

Usually this herbicide residue time can last for a month, it is recommended that the residue can be decomposed in advance before vegetable planting, and herbicide safety additives can be used to plant safer after reducing the debris.

You ask this question because I am a farmer, so I use herbicides, so I sell pesticides, but if he dies quickly, he can die, and he can't kill the roots, and the ones who can kill the roots are super-dry herbicides. There are many varieties, and the effect depends on the level of his content. Of course, the higher the content, the better the effect.

It may be necessary to advance the machine for weeding later. There is no dirt on the land, it is also good for people's health, and the protection of the environment can be straightforwardly promoted. Ultraammonium phosphine is currently the most widely used herbicide.

Currently, there are many grasses that are resistant to ultra-dry herbicides. For example, cow root grass, some vine plants, etc. So now we rarely use superpublishers on our side.

Basically, they are herbicides with superamines.

Oxamine - herbicide was a bit expensive when it was first marketed a few years ago, but now** it has dropped, and a bucket of water (18 liters) is sprayed for 3 to 4 days with more than 3 won, and the grass begins to wither and die. Chemical herbicides are not recommended for cultivated land before sowing. Physical weeding can be chosen.

For example, rotary tillage, rakes, etc. In this way, the weeding can also loosen the soil, which is good for the seeds to take root, there is no waiting period, and the seeds can be sown after the previous planting.

Physical weeding is not suitable if there are well-developed perennial stubborn weeds in the field before sowing. Grass herbicides can be sprayed to control weeds, and both grass and white grass are herbicidal herbicides, but the principle of action and effect are still different. Glyphosate absorbs glyphosate through the stems and leaves, then passes on to the entire strain, and finally dies to the roots.

The disadvantage is that the drug has a slow effect. Paraquat is a rapid herbicide that has a strong destructive effect on plant green tissue. Although paraquat is fast-acting and usually works within a few hours, it is more suitable for annual weeds with underdeveloped roots, as it has no systemic conduction and only wilts the drug site without damaging the roots of the plant.

The herbicide that can not be killed konjac is the essence of quinolin, using 15% emulsion and low toxicity herbicide, the general use of herbicides for the first time is in mid-April to early May, during this time the use of konjac herbicides is very good, because konjac germination is relatively late, generally at the end of May will sprout, and weeds generally grow in March and April, at this time the herbicide can effectively kill the weeds in the konjac field, and do not hurt the konjac.

Glufosinate-ammonium herbicide is recommended. Glufosinate-ammonium is currently the most widespread and commonly used herbicide. There are many glyphosates that are resistant to glyphosate herbicides, such as goose grass, some vines, etc., so we rarely use them now.

Glyphosate has disappeared and basically all glufosinate-ammonium-based herbicides are used. The ** of glufosinate-ammonium oxalate was a bit high when it was first introduced a few years ago, but now ** has declined. A bucket of water (18 liters) costs more than three yuan.

So, after spraying the grass for three to four days, it will start to change.

Fenfen is a selective herbicide that inhibits the photosynthesis of plants, and soon, has a control effect on newly germinated weeds. Ether besulfuron, absorbed by the roots and leaves of weeds, is rapidly transmitted to meristems and plays a herbicidal role. Spraying stems and leaves after wheat sowing and before budding or wheat growth is better for weeding.

Isoproturon, which decomposes quickly in the soil, is mostly used for weed control in autumn crops, especially in wheat fields. If it is used in spring, it has a short effective period and is easy to cause harm to crops.

Paraquat is preferred, as it can be sprayed on weeds with some water.

Quinoxalin is a herbicide that does not harm konjacBut pay attention not to beat the corn when beating, if the konjac has not been unearthed now, then you can play glufosinate ammonium once in the ditch, but do not play glufosinate ammonium on the ridge surface.

Generally, before the konjac germinates, the herbicide is most effective in mid-April and early May, and it will not hurt the konjac. After the konjac germinates, the herbicide can only be used with quinoxalin, if the weeds are particularly large, it is useless to choose manual weeding, so the use of herbicides must be timely.

After the konjac is unearthed, it should be topdressed in time.

Some konjac unearthed is very yellow because of the lack of elements, timely topdressing can effectively solve the problem of konjac leaf yellow, the first topdressing in the konjac out of Qi or weeding more than two-thirds of the top dressing can be carried out.

Generally, the compound fertilizer chooses potassium sulfate that does not contain chlorine or nitrosulfur-based high-potassium compound fertilizer (the ratio of potassium is more than 20 is appropriate), and the fertilizer can not be sprinkled on the konjac leaves when topdressing, and the konjac stem should be separated by 3 to 5 cm.

1. Common weeds in konjac fields.

According to the survey results, the common weeds in konjac fields include horsetail, ox tendon grass, polyspike sedge, glandular peduncle, quinoa, axillary amaranth, bowl flower, etc.

Second, the influence of weeds on konjac.

The influence of weeds on konjac is mainly manifested in three aspects: first, weeds compete with konjac for fertilizer, water and light, and some tall or climbing weeds can completely cover konjac, resulting in poor growth, emaciation and reduced resistance of konjac; the second is to increase canopy density, increase the humidity in the field, and form a high humidity environment near the ground, resulting in the epidemic of konjac disease; Third, the occurrence of weeds is large, the number of manual weeding is large, and the frequent operation in the field causes serious mechanical damage to the roots, stems, petioles and leaves of konjac, aggravates the occurrence of diseases, leads to the aggravation of konjac diseases, and seriously affects the improvement of konjac production and efficiency.

3. Konjac sealing herbicide.

Before the emergence of konjac and intercropping crops after sowing, choose when the soil is more moist after rain, use 200 250 grams of 40% oxyfluoride glyphosate wettable powder per mu, 45 kg of water, evenly spray 1 time, the unearthed weeds and the ground should be sprayed wet, after spraying, we must not carry out activities such as loosening the soil, ploughing, manual weeding, etc., which are effective for all unearthed weeds, and can also kill the weeds that germinate inside the shallow soil layer, especially for broad-leaved weeds.

Fourth, konjac pre-emergence herbicide.

Before the emergence of konjac after the emergence of intercropping crops, 200ml of 20% paraquat water agent can be used per mu, 45 kg of water, neutral laundry detergent is added to the liquid medicine, and the nozzle is added with a protective cover to do directional spraying to prevent the liquid medicine from drifting to the crops and causing pesticide damage. It can control all weeds that have been excavated.

5. Konjac post-seedling herbicide.

After the emergence of konjac and intercropping crops, if the weeds are mainly grasses, 50ml of quinoxalin EC or 60ml of Weiba concentrated EC can be used per mu to 50 kg of water, and the nozzle is covered with a protective cover to do directional spraying to prevent the liquid from drifting to the crops and causing pesticide damage. It can control all grasses weeds, but it is not effective against broadleaf weeds.

6. Herbicides in the middle of konjac growth.

After July, konjac grows vigorously, and there are more weeds, at this stage, weeding can be used 20% paraquat water agent 200ml mu, 30 kg of water, neutral laundry detergent can be added to the liquid medicine, nozzle plus protective cover, do directional spraying, only apply pesticides to ditches and empty belts, to prevent spraying konjac from causing pesticide damage. Effective against all weeds.

Precautions for the use of herbicides in konjac.

1. Spraying herbicides should be applied on sunny days, paraquat should be re-sprayed in case of rain within 4 hours after application, and other pesticides should be re-sprayed in case of rain within 12 hours after application.

2. Within 15 days after spraying all herbicides, field operations such as artificial herbicides and cultivating can no longer be carried out.

3. When oxyfluoride, glyphosate and paraquat are diluted, clean water should be used, and muddy water should not be contained, otherwise the efficacy will be reduced.

4. When applying oxyfluoride and glyphosate, pay attention not to respray or leak spray, and strictly control the dosage. Because ethoxyflufen is highly active, excessive dosage will be prone to drug damage.

In order to read more conveniently, I have shared with you the information about agricultural technology, please click on my avatar to follow me. Since the advent of herbicides, planting wheat and corn and other gramineous crops have played a great role in the control of weeds in the field and greatly improved the input of labor. Difluoctyl oxtyl herbicide has good weeding effect, broad spectrum of weeding and high activity, but in the process of use, if you do not pay attention to the way and method of use, it will not have a good weeding effect, and even play the opposite role, showing the good effect of difluoctyctanoate.

Difluoctane herbicide is a new type of compound herbicide, the main ingredient is a broad-leaf herbicide composed of diflusulam and 2,4-drops of isooctyl ester, which belongs to phenoxycarboxylic acid herbicides. It is widely used in weeding after germination of grasses. Different crops are used for different times.

1. The application of difludropoxetate herbicide in wheat field, this kind of herbicide belongs to hormone herbicides, which has a wide range of weeding, and is effective against broad-leaved weeds with strong resistance such as shepherd's cabbage, wheat artemisia, eight fairy grass, mother-in-law, chickweed, etc. It can control most of the weeds in the wheat field, and with good systemic and contact killing effects, it can further improve the efficacy. It can not be used too early or too late on wheat, after the wheat has 4 true leaves after sowing, until before jointing, spray the weeds in the wheat field, and the weeds have 2 or 5 leaves, the weedicidal effect is the best.

2, to prevent the appearance of pesticide damage, in use, some friends spray wheat pesticide damage, mostly because, wheat is too tender, 4 leaves before spraying is prone to pesticide damage, after wheat jointing, it is strictly forbidden to spray any herbicide, because at this time spraying herbicides is also the most likely to produce pesticide damage, therefore, when using difluorooctanoct herbicide in wheat fields, avoid applying pesticides before 4 leaves and after pulling the wheel and jointing. The temperature in spring is not normal, the temperature fluctuates, sometimes the cold air will bring cooling rainfall, before spraying herbicides, we should pay attention to the weather forecast in advance, avoid windy weather to prevent the drift of the liquid medicine, damage to the nearby crops, cooling, rainfall, snowfall and other weather, so as not to affect the efficacy of the medicine and produce pesticide damage. Winter wheat only needs to be used once a season, in order to avoid pesticide damage, but also pay attention to the concentration of use, can not blindly increase the dosage.

3. The use of difluoctyl ester, generally, 50 ml of 42% difluctoxetate and 20 ml of 58% fluazolamine emulsifiable concentrate can be mixed per mu, using secondary dilution, mixed evenly and sprayed, which can increase the effect of rent weeds and increase the range of weeding. Okay, that's all for today's sharing, welcome attention, like friends who like it, and then go.

Konjac is a broad-leaved plant, and herbicides for the control of grasses and weeds should be selected, such as covering grass energy, or special herbicides for konjac fields.

What konjac compound fertilizer is good for konjac planting?

1. Konjac has a long growth period, high yield, and a large amount of fertilizer.

2. In the early stage of seedlings, chase a konjac compound fertilizer, also known as seedling fertilizer, the early and middle top dressing of the growth period of the tree and bulb 2 3 times, the amount of fertilizer before less and then more, gradually increase, nitrogen, phosphorus, potassium fertilizer to be applied together.

3. In the later stage, the konjac compound fertilizer should be controlled to avoid greedy green and late maturity. Konjac compound fertilizer (n:p:

k=17:17:17) 40-50 kg, after the seedlings are full, they begin to apply fertilizer, and compound fertilizer (n:) is applied per mu

p：k=15：5：

25) 75-100 kg, fertilization combined with hoeing, soil cultivation, plastic film konjac fertilization to take fertilizer with water. Or under the premise of applying sufficient base fertilizer, microbial fertilizer can be appropriately applied in the early stage, and when the konjac grows to the beginning of June (3-4 leaf stage), 15 kg of potassium sulfate konjac compound fertilizer is used per mu.

4. Before the summer heat in mid-July (5-6 leaf stage), 25 kg of konjac compound fertilizer and 15 kg of potassium sulfate per mu should be evenly mixed and applied to the box surface, and the shallow soil should be covered with fertilizer, and the weeds around the field should be pulled out before fertilization. No more fertilization after August. In the period of rapid expansion of taro (June to July), potassium dihydrogen phosphate can be sprayed in combination with the control of pests and diseases, which can promote the expansion of taro and increase the yield.

What are the field management measures in the middle and late stages of konjac?

1. Water management.

Konjac prefers moist air and maintains proper soil moisture, and grows well when the annual rainfall is 1200 to 1800mm; In areas with 800 mm of rainfall, the same effect can be achieved in combination with irrigation. Proper water is conducive to root development, and within a certain range, it can enhance drought resistance.

During the bulb enlargement period (July to August), 75% water content is most conducive to the growth of konjac and bulb expansion. If the soil moisture is too large, the soil aeration will be reduced, which is not conducive to the development of bulbs. If the soil moisture content is less than 60%, it will seriously affect the bulb expansion growth, and irrigation can be carried out at this time.

Irrigation can be carried out by putting "transit water" in the morning and evening or by artificial watering, and sprinkler irrigation is the best. This period is also a period of frequent rainstorms, and it is necessary to do a good job of cleaning ditches and draining stains in time after the rain to prevent waterlogging and dead seedlings.

In the late growth period (9-10 months), the moisture is properly controlled. Generally, the soil moisture content in the field should be reduced to about 60% to facilitate the accumulation of nutrients in underground bulbs. If there is too much water, it is not conducive to the formation of dry matter, which will affect the quality and yield of konjac. Only with proper moisture will you harvest high-yield and high-quality konjac.