How do you kill weeds in a rape field after planting?

In order to effectively control the direct seeding of rapeseed weeds in the city, the following technical measures are proposed:

1. Pre-sowing treatment.

Rapeseed should be treated with herbicides once before sowing: if there are a large number of perennial weeds such as spiny cabbage and endive in the field, it can be sprayed with glyphosate or glucoammonium or Roundup in fine water on a sunny day 7-15 days before sowing. If there are only annual weeds in the field, paraquat can be sprayed with fine water on a sunny day 3-7 days before sowing to kill the weeds that have been unearthed in the field; Or use 100-150 ml of 48% fluorinin emulsifiable concentrate per mu, evenly spray the soil surface with water, and mix the soil immediately.

It is mainly used to control annual grassy weeds such as barnyard grass, wild oats, dogtail grass, horsetail, cow tendon grass, alkali grass, Qianjinzi, early maturing grass, Kanmai Niang, quinoa, amaranth, chickweed, pig hairy cabbage, Baogai grass, purslane and other annual grasses and some dicot weeds. It can also be used for oats, which has a good control effect on watching wheat niang and early maturing grass.

2. Stem and leaf treatment after seedling.

After rapeseed emerges, when weeds grow in the field, herbicides can be used to treat the stems and leaves of the weeds. (1) For rape fields dominated by monocotyledonous weeds, soil spraying treatment was carried out with 96% Jindur EC or 90% acetochlor before seedlings after sowing. At the 3-4 leaf stage of weeds, spray weeding with 45 ml of 5% fine grass gram emulsifiable concentrate or 20 ml of high-efficiency mulberry emulsifiable concentrate mixed with 45 kg of water.

2) For rape fields dominated by broad-leaved weeds, weeding can be controlled with 30 ml of 50% Gaotek or 100-150 ml of quickknife emulsifiable concentrate mixed with 30-45 kg of water at the 2-3 leaf stage of weeds. 30% pyrethicide SC can be used for stem and leaf spray treatment. (3) Rapeseed fields with monocotyledonous and dicotyledonous weeds

At the 4-5 leaf stage of direct seeding rapeseed, the stem and leaves were sprayed with 30% Pyrethalin SC and refined quinoxalin EC. <>

It is possible to pull the weeds by hand and by hand, so that the rape will not be harmed.

The best thing to do is to buy some low-toxicity herbicides, which are specially developed for vegetables and can remove weeds without harming them.

You can manually weed, you can also choose herbicides, pay attention to the time of operation, do not affect the growth of crops.

It is definitely to disperse the herbicide. To choose the least toxic one, but also to grasp the appropriate concentration.

Spray pesticides on time, solve the problem in this way, be sure to pay attention to the type of weeds, pay attention to the condition of the land, so that you can choose a more suitable herbicide.

1。To control gramineous weeds in the field, herbicides can be used to control grasses and weeds in dryland broad-leaved crop fields, such as quinoxamine (such as barge, Qingxiu), pyroflufen, xoxazole, etc. 2 control of broad-leaved weeds in the field for different species of broad-leaved weeds in the field, and the sensitivity of weeds to pesticides can be selected different drug schemes, when the field with chickweed, cattle chickweed, finch tongue grass, broken rice camelina domestic, can choose to use grass control.

When the field is dominated by rice and cabbage, pig cabbage, mud cabbage, and large nest cabbage, there is no good medicine for stem and leaf treatment, and pre-seedling drugs can be used, such as Guangfen plus acetochlor. 3 control of both broad-leaved weeds and grasses in the field, such as broad-leaved weeds in the field with chickweeds, cattle chickweeds, finch tongue grass, etc., grasses to see wheat Niang, Japan to see wheat Niang, wild oats, etc., can choose to use grass control and refined quinoxalin mixture, such as Tian Ge and so on. Kind.

The first is non-chemical grass control technology. Through measures such as timely late sowing, reasonable crop rotation, dense planting of suitable pids, and cleaning of the field, weeds should be prevented from invading the farmland. The second is the technology of chemical removal of differential weeds.

Due to the different regions, sowing seasons and rotation methods, the chemical control strategies and herbicide varieties adopted in rape fields are different. Winter rape growing area. Weed prevention and control adopts the strategy of "(killing) + sealing + killing".

For no-tillage light cultivation of rapeseed, 2 to 3 days before sowing or transplanting, diquat fast, (glufosinate) + butachlor (acetochlor) mu were selected for weeding and soil closure treatment;

Summary. Rapeseed herbicides can be divided into three main types:

1. Rapeseed field herbicides that kill monocotyledonous weeds can be divided into four subcategories according to their classification: 1. Quinoxalin: such as Essence Grass Gram, Golden Cover, Essence Oxazole Grass Herb, Odd Extraction, etc.; 2. Pyrfluoxafen:

Such as killing steadily, killing steadily, etc.; 3. Pyridoxethoxyl: such as high-efficiency grass covering, grass covering, etc.; 4. Essence and mouth oxazole grass spirits: such as Weiba, husper, etc.

These are all high-efficiency herbicides, and the specific use method is shown in the instructions.

2. The herbicides in rape fields that kill dicotyledon weeds are mainly grass killers: such as Gaotek, Haoshiduo, grass control, oil grass mai, etc. It is important to note that these herbicides are limited to kale-type canola fields.

3. Monocotyledonous weeds and canola herbicides in rape fields, due to the different concentrations required by monocotyledonous weeds, they are mainly prepared by the mixture of herbicide and quinoxalin. Such as block knife, ** cover, double grass nemesis, oil grass double gram.

What medicine can kill the weeds of the Liao family in the rape field.

Rapeseed herbicides can be divided into three main types:

1. Rapeseed field herbicides that kill monocotyledonous weeds can be divided into four subcategories according to their classification: 1. Quinoxalin: such as Essence Grass Gram, Golden Cover, Essence Oxazole Grass Herb, Odd Extraction, etc.; 2. Pyrfluoxafen:

Such as killing steadily, killing steadily, etc.; 3. Pyridoxethoxyl commetic celery: such as high-efficiency grass cover energy, grass cover energy, etc.; 4. Essence and mouth oxazole grass spirits: such as Weiba, husper, etc.

These are high-efficiency herbicides, and the specific use method is to see the instructions.

Second, the main herbicide in the rape field that specializes in killing dicotyledon weeds is the grass killer: such as Gotek, Haoshi Duo Talk Destroy, Grass Removal Branch, Oil Grass Mai, etc. It is important to note that these herbicides are limited to kale-type canola fields.

3. Herbicides in rape fields with monocotyledonous and dicotyledonous weeds are mainly prepared by the mixture of herbicides and quinoxalin due to the different concentrations required by monocotyledonous weeds. Such as a block knife, ** cover bend, double grass nemesis, oil grass with acacia double grams.

Summary. This weed can be controlled with diflusulam. The herbicides suitable for soil sealing treatment in wheat fields mainly include green melon, isoproturon, acetochlor, benzsulfuron-methyl, thiensulfuron-methyl, etc.

Available difluorofluoro, fluorochloroester! Come to the control of wheat field oil cabbage! There are many wild rape in wheat fields, which can be controlled with drugs such as oxamidophosphine fluoride and isoproturon.

As long as there is no good way after wild rape mossing, if there is no moss, it can be controlled with dimethyltetrachloride plus chlorofluoropyroxyacetic acid before jointing and late filling of wheat. At present, it is relatively safe to use benzensulfuron. There are many pesticides for rape removal in wheat fields, and I think that besulfuron is cheap and good.

It can be controlled with azole chlorethoxadifolis mixture.

What herbicides are used in wheat field rape.

This weed can be controlled with diflusulam. The herbicides suitable for soil sealing treatment in wheat fields mainly include green melon, isoproturon, acetochlor, benzsulfuron-methyl, thiensulfuron-methyl, etc. Available difluorofluoro, fluorochloroester!

Come to the control of wheat field oil cabbage! There are many wild rape in wheat fields, which can be controlled with drugs such as oxamidophosphine fluoride and isoproturon. As long as there is no good way after wild rape mossing, if there is no moss, it can be controlled with dimethyltetrachloride plus chlorofluoropyroxyacetic acid before jointing and late filling of wheat.

At present, it is relatively safe to use benzensulfuron. There are many pesticides for rape removal in wheat fields, and I think that besulfuron is cheap and good. It can be controlled with azole chlorethoxadifolis mixture.

Thank you.

Herbicides commonly used in rape fields.

Yes: Pre-broadcast: Fluorin. Post-seeding and pre-seedling: dichlor or dol. After the seedlings: Jingquinohelin.

Cover grass can or dilute oxadone, etc., which can control grass weeds. Each herbicide is used together with herbicide safety additives to solve the damage caused by herbicides to oilseed rape or soil. Of course, the herbicide that cannot be used on rape is the herbicide that kills broadleaf weeds, and cannot be used in the treatment of rape stems and leaves.

Acetochlor can be used.

Soil closure of weeds. Acetochlor is a selective bud soil treatment herbicide, sprayed on the soil, forming a layer of toxic soil on the soil surface, when the weed bud sheath grows to contact the toxic soil layer, it absorbs acetochlor to inhibit the growth of weed shoots and young roots, resulting in weed death. When transplanting seedlings in spring, there will generally be some new shoots on the seedlings, so after transplanting the seedlings, the nozzle should be lowered to take the method of directional spraying, and it is best to spray the seedlings with acetochlor after spraying a safety additive to prevent the herbicide from drifting to the seedlings and causing pesticide damage.

Rapeseed diseases include downy mildew, rape rust, rape sclerotinia and rape powdery mildew. Prevention and control methods: rape downy mildew can choose to plant disease-resistant varieties, implement crop rotation planting, and use 75% chlorothalonil in the rape sprouting stage.

500 times of wettable powder for spraying; Rapeseed white rust is deeply ploughed after the crop harvest to remove the disease residues in the field, and can be sprayed with 1000 times of 80% carbendazim wettable powder for control.

1. Disease symptoms (1) Rapeseed downy mildew: The disease mainly harms leaves, stems and horns, which will cause the plant to turn yellow and grow white mold, and there will be light green spots in the early stage of the disease, and then expand into polygonal yellow patches, and white mold will grow on the back of the leaves. (2) Rape white rust:

The disease should pay attention to the leaves, stems, and horns of rapeseed, light green dots can be seen on the leaf surface, and then gradually turn yellow into round lesions, and white lacquer-like blisters will grow at the lesions on the back of the leaves, and white lacquer-like blisters will grow, and the shape is long or short strips. (3) Sclerotinia sclerotiorum in rapeseed: the disease can occur in the whole growth period of rapeseed, and the occurrence is more serious in the fruiting period, stems, leaves, flowers, and horns can be damaged, and the stem damage is more serious.

4) Rapeseed powdery mildew: This disease mainly harms rape leaves, stems, and horns, and a small amount of dotted filaments expand outward in the early stage of the disease, and then connect into a piece, and the leaves are positive.

There are powdery mildew spots on the reverse side, and when the disease is relatively mild, the growth and flowering of rape plants are hindered.

Well, some herbicides can be used after rape transplanting, including basements, which are herbicides, and the effects are obvious, well, especially when rape grows up, it is also very tasty.

Post-seedling weeding can be done with quinoxalin, and weeding is good.

After transplanting oilseed rape, you can participate in local pest and disease intelligence.

It is best not to use herbicides after transplanting rape.

Use cletholate and herb to remove the spirit, and the grass is clear.

Personally, I think it is better to remove it manually.

Chemical removal was carried out at the 6-leaf stage of rapeseed, and herbicide and dichloropyridic acid were sprayed.