RU2297141C1 - Hogweed controlling method - Google Patents

Abstract

FIELD: agriculture, in particular, weed plant controlling process.

SUBSTANCE: method involves treating weedy land with system herbicides possessing soil activity properties; immediately after treatment, mellowing soil on land to 10-15 cm depth and turning soil layer; providing repeated treatment of soil with selective herbicide; forming sod cover by sowing grass seeds resistant to selective herbicide.

EFFECT: reduced probability of weeding land with hogweed and decreased labor intensity and treatment means.

Description

The invention relates to the field of agriculture, but may find application on non-agricultural land, for example: in the right of way of railways and roads.

The essence of the problem lies in the fact that in many regions of the country both on the fields and on the side of roads and other non-agricultural lands, hogweed has spread. In our country, more than 40 species of hogweed grows. However, Sosnovsky’s hogweed (Heracleum sosnowskyi Manden) is of particular danger. At the end of the last century, this species was introduced into the culture of agriculture as a high-yielding forage crop. However, practice has shown that animals eat it poorly and there have been cases of poisoning. The cultivation of hogweed in the fields was discontinued. However, by this time, Sosnowski hogweed had been well acclimatized in natural conditions and turned into a dangerous weed. The juice of this plant contains furocoumarins, the ingress of which on the skin of a person causes severe burns. Therefore, work is everywhere organized to destroy the centers of its distribution (Filatova I.A., Vlasov Yu.V. Borshevik Sosnowski “masters” new areas. Journal of Plant Protection and Quarantine; 2002; No. 12; p. 38-39). It should be noted that other species of hogweed are no less dangerous, therefore, in the future we will talk about hogweed without highlighting the species.

A known method of destroying hogweed, which consists in conducting deep tillage with high-quality plowing. This method is effective in large areas of agricultural land. However, it retains the possibility of re-clogging the field with seeds carried by the wind from the adjacent undisturbed lands. In areas of non-agricultural land (right-of-way, other lands) with a relatively small width of the right of way, the likelihood of re-seeding the treated area with seeds of plants growing outside it is even higher.

Therefore, the known method is more effective, including the treatment of vegetative plants of cow parsnip with a herbicide (Lazarev AM Caution cow parsnip. Journal of Plant Protection and Quarantine; 2004; No. 6; p. 55).

This method was adopted as a prototype.

The disadvantage of this method is the short duration of the action of the herbicide in the treatment of vegetative plants, since the soil contains a large supply of hogweed seeds, which, after the death of vegetative plants, will be able to sprout and form new thickets of hogweed, the destruction of which requires repeated treatment. In total, up to three treatments are required during the growing season, which requires a lot of labor and money.

The purpose of the invention is to reduce the possibility of re-overgrowing of land with hogweed and reducing processing costs.

This goal is achieved by the fact that in the known method of destroying hogweed, including treating the plot with herbicides, according to the invention, the treatment is carried out with systemic herbicides having soil activity, after which the soil in the plot is loosened with a layer revolution of 10-15 cm in depth, then the herbicide is again treated selective action and form a sod cover by sowing grass seeds resistant to selective herbicide.

The technical result consists in the fact that the combination of the treatment of the plot with a systemic herbicide with soil activity, with loosening of the soil with a turnover of the reservoir, repeated treatment with a selective herbicide and sowing of grass resistant to the selective herbicide, allows to destroy the stock of hogweed seeds in the upper soil layer and at the same time form a turf that prevents the germination of seeds carried by the wind.

We will consider the implementation of the proposed method for the destruction of cow parsnip on the example of the right of way of roads. The right of way is treated with a systemic herbicide with soil activity (for example, an herbicide based on imadosapir), while the rate of application of the drug is prescribed based on the complete destruction of the cow parsnip plants. After the dying of the vegetative mass of the hogweed, the soil in the area is treated with a heavy disk harrow to a depth of 10-15 cm. In this case, the angle of processing of the disks is set from the condition of ensuring the turnover of the formation. When processing the soil, weed and herbicide seeds are moved to the depth of processing. The soil activity of herbicides based on imadosapir causes the death of hogweed plants at the seedling stage. The movement of the herbicide in the depth of the soil layer provides its protection against phytodecomposition (decomposition under the action of sunlight) and increases the duration of soil action. After processing the soil, the plot is sprayed with a selective herbicide (for example, based on sulfanylurea), ensuring the destruction of hogweed plants sprouted from seeds extracted to the surface from the soil and brought in by the wind, then sowing grass seeds (timothy grass meadow, fescue meadow, beechless campfire, foxtail meadow, pasture ridge) seeding rate of 8-10 kg / ha. Due to the action of a systemic herbicide with soil activity, the hogweed shoots die on the treated area within two to three years, and over this period grass grows with the formation of turf, which, inhibiting the hogweed seedlings, prevents them from clogging the treated road lane.

On agricultural land, the proposed method is implemented in the same sequence on crop rotation fields designated for growing perennial grasses.

Thus, it reduces the possibility of re-overgrowing of land with cow parsnip for 5-6 years, and thereby significantly reduce the cost of cultivating the land with herbicides.

Claims (1)

A method of destroying a cow parsnip, including treating the plot with herbicides, characterized in that the treatment is carried out with systemic herbicides having soil activity, after which the soil in the plot is loosened with a turnover of the formation, to a depth of 10-15 cm, then repeated treatment with a selective action herbicide is carried out and a turf is formed cover by sowing seeds of grasses resistant to selective herbicide.