Modern Methods Of Fighting Hogweed And Other Weeds

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Modern Methods Of Fighting Hogweed And Other Weeds
Modern Methods Of Fighting Hogweed And Other Weeds

Video: Modern Methods Of Fighting Hogweed And Other Weeds

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Video: Hogweed is one of Canada's most dangerous plants, here's what you should know 2023, February

A significant part of the time of summer residents is occupied by weed control. With untimely and illiterate destruction of weeds, weeds often turn out to be the winners on the site, taking away lighting and nutrients from cultivated plants. Weed control methods depend on many factors, including the species and biological properties of weed plants, soil characteristics and climatic conditions. It is impossible to completely get rid of weeds, but every summer resident can reduce their number to reasonable limits.


Traditional and safe, but time-consuming and physically demanding, are methods that involve the physical eradication of weeds.

For this:

  • mulch the soil to close the access of light to germinating weeds;
  • annually carry out deep digging of soil and deep weeding with pruning of roots and their selection;
  • the weeds are mowed before flowering, after which they dig up the soil in the fall.

But there are certain types of weeds, the appearance of which on the site is akin to a fire. These hard-to-eradicate weeds include mainly perennials, which can reproduce both by seeds and vegetatively. Among them, there are several particularly vicious species familiar to every gardener: hogweed, wheatgrass, sow thistle, wood lice, pig, runny, nettle.

Why are these weeds called difficult to eradicate?

Wheatgrass, pig, bindweed, sow thistle, lily, woodlice are considered malicious weeds, since they combine the ability to reproduce annually by seeds with active vegetative propagation. Moreover, the roots, rhizomes and the remains of aboveground parts of plants are involved in vegetative propagation. They are very resistant to diseases and pests, and some themselves become a haven for soil pests (for example, scoops and wireworms settle at the roots of wheatgrass). These weeds must be destroyed all season, but especially carefully - before flowering. In a later period, getting rid of them is much more difficult. Numerous ripe seeds germinate almost immediately after entering the soil, and under unfavorable conditions they retain their germination for a long time. So, woodlice seeds remain viable for up to 30 years.

Sosnovsky's hogweed - the "king" of weeds

From the group of the named malicious weeds, Sosnovsky's hogweed stands out - an especially dangerous weed, the juice of which can cause serious harm to human health. This incredibly beautiful plant, especially during the flowering period, poses a huge threat to the health of adults and children. All parts of hogweed contain furanocoumarins - phototoxic essential oils.

Furanocoumarins, under the influence of ultraviolet radiation, pass into an active form and when the juice gets on the skin under the influence of sunlight, they cause severe burns, which may not appear immediately, but after a few hours, and even after 2 days. Juice in the eyes can cause blindness if immediate protective measures are not taken. Essential secretions with a smell vaguely reminiscent of kerosene, and pollen are the strongest respiratory allergens, the effects of which are felt by allergy sufferers already at a distance of 5-6 m from its thickets.

With age, not only the biomass of the hogweed increases, but also the level of its phototoxicity. It differs in a particularly high level of phototoxicity during the period of flowering and seed ripening (in the 4th - 7th years of development).

In order not to confuse the poisonous hogweed with its "harmless relatives", you need to know its main external differences.

Sosnovsky's hogweed
Sosnovsky's hogweed

How to distinguish Sosnovsky's hogweed from other species?

A distinctive feature of the Sosnovsky hogweed are:

  • large inflorescences of white color, bearing in a complex umbrella, ray-shaped simple umbrellas;
  • the edges of the leaves are crooked toothed; the color of the leaf blade is green with a yellowish tinge;
  • stem villi are dense, have purple blotches.

What is the difficulty of fighting hogweed?

The complexity of the fight against hogweed lies in the fact that in the cycle of the life cycle, he developed unique properties that allow the plant to successfully resist destruction.

It reproduces by self-seeding with the formation of a huge number of seeds. One plant can produce over 100 thousand seeds. Sosnovsky's hogweed blooms once in a lifetime (monocarpic). After fruiting, the plant dies off immediately. But if there are no appropriate conditions for flowering, it lives up to 12 years, annually forming an ever growing plant mass.

Annual mowing of hogweed is an ineffective and laborious technique, since the overgrown roots and rhizomes remaining in the soil in the spring again form a powerful vegetative mass. It should be noted that the vast majority of young hogweed under large trees dies or develops poorly, which is the basis of one of the methods of its destruction in small areas during digging and sampling of roots.

Modern technologies for weed control

Traditional methods do not completely get rid of the poisonous hogweed. The fastest way to get rid of him and other especially malicious and harmful weeds in the garden and in the garden is to use modern herbicides.

In the last decade, new technologies have been proposed for weed control using substances that effectively destroy them. 1 - 2 treatments of green weeds with these substances are enough to clear the vegetable garden and orchard from their presence.

Technoexport has developed modern, highly efficient, environmentally friendly means of weed control. One of these agents is the chemical "Ground". The active ingredient of the drug "glyphosate" is derived from the amino acid glycine. "Ground" refers to a group of continuous systemic herbicides that destroy a large group of green weeds, including the aforementioned sow thistles, wheatgrass, pigs, nettles, woodlice, whitewash, tuberous and root crops.

According to the research results, the company's specialists have revealed that the best protection is an integrated approach to weed control.

The effect of the "Ground" preparation is enhanced by 2 more active components, as a result, a composition of three active components has been obtained, which provide almost complete destruction of about 150 species of the most malicious and difficult to eradicate weeds.

Sosnovsky's hogweed
Sosnovsky's hogweed

Set "Ground against hogweed and other weeds"

The set "Ground against hogweed and other weeds" is intended for preparing a tank mixture. It contains "Ground" and the drug "Propolol", which contains 2 active chemicals - dicamba and chlorsulfuron. Such herbicides of continuous action, combined in a tank mixture, effectively destroy difficult to eradicate (with a powerful branched root system) and perennial weeds.

A set is available in packages with bottles and bags of different dosages, which is very convenient when used for weed treatment in small and large areas.

Preparation of working solution

  • dissolve 120 ml of the "Ground" preparation in 10 liters of water at room temperature, unless a different dosage is recommended;
  • add 1 package (4 g / 10 l of water) to the solution of the drug "Propolol";
  • mix the mixture thoroughly until completely dissolved;
  • pour into a sprayer.

Table: Consumption rates of the tank mixture

Culture Weeds Mixture consumption rate Application regulations
Fruit, citrus, grapes Annual cereal and dicotyledonous weeds 80 ml / 10 l of water Spring and summer (directional spraying)

Consumption: 5 l / 100 sq. m area.

Perennial cereals and dicotyledonous weeds 120 ml / 10 l of water
Vegetables, melons, potatoes, annual flowers (seed crops) Annual cereal and dicotyledonous weeds 80 ml / 10 l of water Spraying vegetative weeds in the post-harvest period (repeat if necessary).

Consumption: 5 l / 100 sq. m area.

Perennial cereals and dicotyledonous weeds 120 ml / 10 l of water
Potatoes Annual and perennial cereal and dicotyledonous weeds 40-60 ml / 10 l of water Spraying of green weeds 2-5 days before the emergence of potatoes.

Consumption: 5 l / 100 sq. m area.

Weeds outside crop areas Annuals, perennials, cereals, dicotyledons and other weeds (roadside areas, roadsides, abandoned places). 80-120 ml / 10 l of water Spraying green weeds.

Consumption: 5 l / 100 sq. m area.

Herbicide "Ground" for hogweed and other weeds
Herbicide "Ground" for hogweed and other weeds

Spraying rules

When preparing and working with a tank mixture, it is necessary to use personal protective equipment: a hat, glasses, a respirator, gloves, a tight dressing gown and trousers, and separate shoes.

When treating weeds, thoroughly moisten the surface of the leaves.

To prevent the solution from getting on the grown plants, the weeds are treated at low pressure in the sprayer.

At the end of the work, all parts of the sprayer are thoroughly washed with water.

Plant treatment recommendations

  • Weeds are treated only in dry, calm weather (after the dew or raindrops have completely dried).
  • Re-treatment is required if it rains 4-5 hours after spraying.
  • Within a week after spraying, the weeds are not mowed (waiting period up to 7-10 days).
  • The optimal processing period for hogweed is early spring, the phase of 2 - 3 true leaves. The period of obvious exposure to the tank mixture is 5-10 days (yellowing of the aboveground mass of weeds). Complete dying off of weeds - 2-3 weeks.
  • When processing garden plants, the spray is directed to the weeds. It is necessary to ensure that the tank mixture does not get on the cultivated plants. If aisles are processed, the crops can be covered during spraying.

More detailed information on preparations for weed control can be found on the Tekhnoexport website.

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