When can the wild wheat be controlled?

When can the wheat after autumn cure the wild wheat?

Hello, actually, as far as I know, there are currently two registered pesticides for controlling wild wheat in China, namely, sulfuron-methyl (Hu Biao or Shanghai-Nanjing) and sulfamethoxazole (priority). Both of them belong to high-efficiency sulfonylurea systemic herbicides in wheat fields, which have obvious control effects on gramineous weeds such as wild oats, brome, melon and many dicotyledonous weeds. But it should be used according to the specific situation.

One is to look at the different temperature requirements. It is required that sulfuron-methyl be used above 8℃, and the control effect is good enough, while the optimum temperature of sulfamethoxazole is above 2℃.

The second is to look at the difference in medication time. Flusulfuron-methyl is required to be used at the 2 ~ 3 leaf stage of wheat (more than 25 days after sowing), and the best use time of fenoxaprop-p-ethyl is at the 3 ~ 6 leaf stage of wheat (more than 35 days after sowing).

The third is to look at security. The so-called safety means that the yield of wheat will not be affected after application. Herbicide is a double-edged sword. At the same time of controlling wild wheat, wheat seedlings sometimes appear temporary yellowing or crouching after pesticide application. Under normal use, the yellowing of wheat disappears after turning green, which generally does not affect the yield. Flusulfuron-methyl should be taken as soon as possible at a suitable temperature, and the earlier the time, the higher the safety factor; When the temperature is suitable, the time should be delayed as much as possible, and the safety factor is relatively high if it is delayed appropriately. I can only answer you like this at present. I hope I can help you. Have a nice day.

When should wild wheat be used as pesticide? What medicine should I use?

It's Gregorian calendar 165438+ October.

There are several pesticides to control wild wheat.

Wild wheat is a popular saying, depending on what weed it is.

How to eradicate wild wheat in wheat fields

Wild wheat, also known as wild wheat and wild barley, competes with wheat for water, fertilizer, glory and space in the wheat field, which leads to poor individual development and population structure of wheat, greatly reduces the uniformity of wheat in the field, and directly affects the 1 step improvement of wheat yield and the decline of quality. In recent years, wild wheat has appeared in many plots in our city, and it is on the rise. Therefore, farmers' friends should attach great importance to it. The source, characteristics and control methods of wild wheat below 1 are introduced as follows: 1, the main source of wild wheat is 1, which is naturally separated with the emergence of new varieties in the breeding process. 2. Genetic degradation of farmers' own seeds and offspring of farm varieties. 3. Long-term natural degradation of exotic varieties carried by cross-regional harvesting of agricultural machinery. 4, organic fertilizer composting process. 2. Characteristics of wild wheat: 1. The post-ripening period of wild wheat is very long, for example, 1 is 4⑸ months. It can survive for 23 years after being buried in soil, and can germinate, grow and bear fruit under suitable conditions of 65438 0 denier. 2. The tillering rate of wild wheat is very strong, 7 tillers per plant are 1, and many tillers can reach 152 0. About 90% of the tillers can ear, but the tillering stage is not 1. 3. Wild wheat plants are tall, with thin stems and easy lodging. If wild wheat accounts for more than 15% of the wheat field, it is easy to lodging and reduce production. 4. Wild wheat ripens early, with small grains, strong dropping ability and "loose" ear, which is easy to drop after ripening, and mechanical harvesting is more likely to cause dropping. 3. The control method of wild wheat: 1, and the agricultural measure: 1 is to select high-quality wheat seeds; 2. Deep ploughing or crop rotation before sowing; 3. Farming in the field at seedling stage before winter can control some wild wheat when the wheat turns green and rises in early spring. 2. Physical measures: Manual removal is a very effective method, which is carried out in two periods: before winter and in spring. After the wheat grows to 3 leaves 1 heart before winter, the leaves of wild wheat at seedling stage are long and narrow, clustered and pale, and some leaves have fluff. At this time, the wheat seedlings on the ridge back and between rows are mostly wild wheat, which should be removed with emphasis. In spring, wheat grows rapidly, and wild wheat breeds in large quantities, which can be identified from wheat, especially after heading, which is easier to identify, and attention should be paid to uprooting. The seeds of wild wheat have vitality 7 days after flowering, so it can be basically eradicated for 23 consecutive years by uprooting them before flowering and taking them out of the field to burn or feed them to animals. View original post >>

How to control wild wheat?

Talking about the prevention and control of wild wheat. It's a little late to use herbicides now. If Ye Haizi hasn't jointing yet, you can spray Shima herbicide, and the effect is good. It's okay to be a horse If you have been pointing, a better way is to pull it out manually. At this time, the effect of spraying herbicide is not good, and the dosage is also very large, which is not good for wheat growth.

How to clear the wild wheat in the wheat field?

Wild wheat, also known as wild wheat and wild barley, competes with wheat for water, fertilizer, glory and space in the wheat field, which leads to poor individual development and population structure of wheat, greatly reduces the uniformity of wheat in the field, and directly affects the 1 step improvement of wheat yield and the decline of quality.

Main source of wild wheat: 1. Varieties naturally separate with the emergence of new varieties in the breeding process. 2. Genetic degradation of farmers' own seeds and offspring of farm varieties. 3. Long-term natural degradation of exotic varieties carried by cross-regional harvesting of agricultural machinery. 4, organic fertilizer composting process. Characteristics of wild wheat: 1. The post-ripening period of wild wheat is very long, generally 4 ⒖ months, and it can survive for 2 ⒖ 3 years after being buried in soil. Once the conditions are right, it can germinate, grow and bear fruit. 2. The tillering rate of wild wheat is extremely high. Generally, there are 7 tillers per plant, and the most tillers are 152 0. About 90% tillers can form panicles, and the tillering period is inconsistent. 3. Wild wheat plants are tall, with thin stems and easy lodging. If wild wheat accounts for more than 15% of the wheat field, it is easy to lodging and reduce production. 4. Wild wheat ripens early, with small grains, strong dropping ability and "loose" ear, which is easy to drop after ripening, and mechanical harvesting is more likely to cause dropping.

Control methods of wild wheat:

1. Agricultural measures: First, select carefully processed high-quality wheat seeds; Second, deep ploughing or crop rotation before sowing; Thirdly, intertillage is carried out in the field at the seedling stage before winter, that is, in early spring, when the wheat turns green and rises, so as to prevent some wild wheat.

2. Physical measures: Manual removal is a very effective method, which is carried out in two periods: before winter and in spring. After the wheat grows to 3 leaves 1 heart before winter, the leaves of wild wheat at seedling stage are long and narrow, clustered and pale, and some leaves have fluff. At this time, the wheat seedlings on the ridge back and between rows are mostly wild wheat, which should be removed with emphasis. In spring, wheat grows rapidly, and wild wheat breeds in large quantities, which can be identified from wheat, especially after heading, which is easier to identify, and attention should be paid to uprooting. The seeds of wild wheat have vitality 7 days after flowering, so it can be basically eradicated for 23 consecutive years by uprooting them before flowering and taking them out of the field to burn or feed them to animals.

3. Plow or plough in autumn. Before sowing winter wheat, deeply plough 24 ~ 27 cm, and bury wild oat seeds deep underground. In the second year, there were basically no wild oats, which greatly increased the yield per unit area of wheat.

Sowing in time, fertilizing, overwintering and strengthening seedlings, turning green in spring is 7 ~ 10 days earlier than the emergence of wild oats, which can effectively inhibit or reduce soil treatment before sowing: before sowing wheat, treat the soil with chemical herbicide oatmeal, level the land to be sown before treatment, when the topsoil is full, mix 50 kg of water with 200 ml of 40% oatmeal EC per mu, and use a disk shovel within 2 hours after application. Mix the medicine and soil evenly. When the soil moisture is poor, use 250 ml of 40% oat emulsifiable concentrate, 50 kg of water per mu, and spray with 55 hanging sprayer. This can prevent wild oats from appearing during the emergence of wheat.

Post-emergence soil treatment: When watering the winter wheat field for the first time in spring or the spring wheat field for the first time, 200 ml of 40% oat EC mixed with 8 kg of urea is used for fertilization per mu, followed by fertilization and watering to prevent wild oats from sprouting in large quantities after watering the wheat field for the first time and the second time, which will endanger wheat production.

If it is found that wild oats are still growing after two days of watering wheat, stem and leaf treatment should be taken at this time, that is, wild oats should be sprayed in the fields by horses. The effect is best when the relative humidity in the field reaches 80% ~ 90% 2 ~ 3 days after watering. The dosage per mu is 60 ml of 6.9% Hummer glue suspension and 30 kg of artificial water spraying. If there are twins in the wheat field,

How long does it take for wild wheat to rain and snow?

Don't worry about being affected when it snows after spraying wild wheat. Because it's not like rain. When the snow clears, the medicine on the wheat leaves will not be washed away by snowflakes.

There is wild wheat in the wheat field now. What medicine should I take?

One is to look at the different temperature requirements. It is required that sulfuron-methyl be used above 8℃, and the control effect is good enough, while the optimum temperature of sulfamethoxazole is above 2℃.

The second is to look at the difference in medication time. Flusulfuron-methyl is required to be used at the 2 ~ 3 leaf stage of wheat (more than 25 days after sowing), and the best use time of fenoxaprop-p-ethyl is at the 3 ~ 6 leaf stage of wheat (more than 35 days after sowing).

The third is to look at security. The so-called safety means that the yield of wheat will not be affected after application. Herbicide is a double-edged sword. At the same time of controlling wild wheat, wheat seedlings sometimes appear temporary yellowing or crouching after pesticide application. Under normal use, the yellowing of wheat disappears after turning green, which generally does not affect the yield. Flusulfuron-methyl should be taken as soon as possible at a suitable temperature, and the earlier the time, the higher the safety factor; When the temperature is suitable, the time should be delayed as much as possible, and the safety factor is relatively high if it is delayed appropriately. I can only answer you like this at present. I hope I can help you. Have a nice day.

The wild wheat in the wheat field was treated with the special medicine for controlling wild wheat last winter, and gradually the leaves of wild wheat dried up, but it rebounded in spring, with a score of 10.

Before winter, after the three-leaf and one-heart period of wheat (about 35 days to 40 days after wheat sowing), herbicides such as bensulfuron-methyl and bensulfuron-methyl were sprayed on the plots with wild wheat. Then it is used to control broad-leaved weeds together with herbicides such as tribenuron-methyl, thiophanate-methyl, fluroxypyr, dimethyl tetrachloromethane, carfentrazone-ethyl and fomesafen.