Herbicides against ragweed: control measures and descriptions of the best drugs

Herbicides against the spread of ragweed help increase yields. After all, even two weeds per square meter reduce soil fertility, reduce the amount of crop by 15 percent. For successful cultivation of almost all crops, it is necessary to deal with the weediness of the field. Ragweed is destroyed by spraying with a herbicidal solution. Field processing is carried out in calm weather at a temperature of 10 to 24 degrees Celsius.

Weed description

Agbrosia is an annual weed that quickly spreads across the field, depriving the main crops of water and nutrition. Propagated by seeds and growth of the root system. The height of the weed reaches from 19 to 199 centimeters.

Weed grass has a straight, branched stem upwards, twice pinnately dissected leaves, spicate inflorescences with numerous yellow flowers. The weed has a long tap root. One bush remains viable for up to 40 years and produces over 200 thousand seeds. Mass shoots of weeds appear in May. The weed blooms in July-August. Pollen can cause allergic conjunctivitis. There are three types of ragweed: perennial, tripartite, wormwood.

What harm does ragweed

This weed is dangerous for livestock feed grasslands. Animals try not to eat this plant, as it contains a lot of essential oils. In addition, ambrosia worsens the taste of milk. This weed, unpretentious to the habitat, quickly spreads across the field and strongly dries up the soil. It oppresses the sown crops, takes away water and nutrients from them.

The powerful root system of this weed does not allow cereal seeds to germinate.Selecting useful substances, ambrosia itself can grow up to 3 meters in height. To create one kilogram of green mass, this weed removes tens of liters of water from the soil, a lot of phosphorus, potassium and nitrogen. The plant, wherever it appears, begins to grow strongly, develops a powerful aerial part and root system.

Pest control measures

It is recommended to deal with ambrosia in several ways. You can get rid of weeds by uprooting them. True, ragweed will have to be removed for several years in a row. Young sprouts will appear on the field every season.

How to get rid of with herbicides

Agbrosia is susceptible to many types of herbicides when used in the early stages of weed growth (2 to 6 leaf phase). With later use of chemicals, weeds may develop resistance to these drugs.

The most effective herbicides for ragweed control are: Roundup, Grenadier, Impex Duo, Helios, Bazagran, Promex.

Mechanical action

They try to get rid of ragweed by constantly mowing this weed. True, too frequent mowing is harmful. After all, it provokes the branching of the root system and the emergence of new shoots. After each mowing, the ragweed produces 2-3 times more sprouts than was removed.

You need to mow the weed 3-5 times a season, preventing it from forming buds and blooming.

On the field, ragweed is fought with the help of loosening, weeding, hilling, harrowing. After carrying out such agrotechnical measures, growth is partially suppressed or weeds are completely destroyed.

How to deal with a plant with biological methods

The biological method of weed control is considered the most budgetary. It will be possible to get rid of the weed with the help of an ambrosia scoop or an ambrosia leaf beetle. Thanks to these insects, it is possible to control the spread of weeds. True, a person cannot influence the number of insects themselves.

You can fight ragweed in another biological way - by crowding out with perennial grasses. Alfalfa, mustard, foxtail, wheatgrass, fescue, couch grass, and brome are capable of recapturing the entire territory from this weed. If these herbs are constantly sown on pastures, then in 2-3 years they will displace ragweed.

How weed can be useful

Ambrosia is rich in vitamins, trace elements, essential oils. All parts of this plant are used for medicinal purposes. On the basis of vegetable raw materials, tinctures, ointments, and decoctions are made. Medicines are used externally and internally.

This plant is used to treat helminthiasis, dysentery, diarrhea. The herb has antipyretic, anti-inflammatory properties. The substances contained in this plant stop the growth of cancer cells. Crushed leaves are used for compresses for wounds, bruises, sciatica, osteochondrosis.

How to prevent ragweed

The most effective is the chemical protection of the field. Herbicides quickly and for a long time destroy this weed. Before using any of the drugs, dilute with water in the dosage indicated in the instructions.

To combat ragweed, herbicides based on the following active ingredients are used:

1. Dicamba. This substance is allowed to be used to protect cereals. The active substance stops cell division, inhibits the growth of weeds.
2. Triasulfuron. This substance, in combination with dicamba, is used to protect cereals. After spraying, the weed immediately stops growing, and after 10 days signs of wilting appear (necrosis, chlorosis). Complete death occurs after 2-4 weeks.
3. Prosulfuron. Protects cereals from weeds. You can use such a herbicide in the early stages of growth.
4. Glyphosates. The herbicide disrupts the processes of protein synthesis, blocks photosynthesis and respiration of weeds, and leads to wilting. Glyphosates are applied before sowing the main crops.
5. Dimethenamid-P. Used for pre-emergence and post-emergence treatments. With a lack of moisture, this product can be embedded in a moist layer of soil. The drug inhibits the cell division of weeds.
6. Pendimetalin. The agent is used before sowing or emergence of seedlings of the main crops. In dry weather conditions, the herbicidal product is embedded in the soil.
7. Imazamox. Suppresses the biosynthesis of proteins, leads to the death of leaves and growth points. The herbicidal agent begins to act immediately after spraying.
8. Bentazon. Inhibits the processes of photosynthesis. Weeds stop growing and die quickly.
9. Thifensulfuron-methyl. Stops cell division, inhibits the ALS enzyme. A few hours after spraying, the weed grass stops growing and begins to wither.
10. Imazetapir and chlorimuron-ethyl. Used in the early stages of weed growth, regardless of the phase of development of the main crop.

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