What weed does not bring berries, but does it smell of wine?

In nature, ambrosia regales insects, tree bugs. In the tunnels that they gnawed in a tree - tunnels, there are certain marsupial mushrooms, whose mycelium is called the same as divine food.

But people are no longer bothered by mushrooms, but by the appearance of a pretty green plant with the same name. About 100 years ago nobody heard about him in Russia at all. Then came the turn of concern. The impostor, without demand, occupied more and more new territories, simultaneously harassing and oppressing useful cultivated plants cultivated by man.

The hopes that the natural distribution of its distribution would be limited to the Urals were not justified. Ambrosia easily stepped over low mountains and adapted to the Siberian frosts.

What is not pleased with the plant people? Jaroslav Zadorozhny told readers of the School of Life about the harm to human health. Oral allergy syndrome caused by pollen once in the future may be felt when using not only southern bananas, but even ordinary cucumbers, zucchini and mustard.

For agriculture, ambrosia is a dangerous, insidious and ruthless enemy. A powerful root system (up to four meters) suppresses cultivated plants and leads to the desiccation of the soil, sharply reducing fertility, or even completely destroying the crop.

The roots feed the stem, which grows up to two and a half meters. A real monster! If the ambrosia is allowed to grow, its powerful thick stems will make impossible the mechanized harvesting of grain by combines.

Unlucky gardeners, sometimes decorating their plot with pretty grass that looks like wormwood, take great risks. Each ton of green mass of ambrosia in the process of growth pulls out of the soil almost a thousand tons (!) Of water, over 15 kilograms of nitrogen and many other useful elements - potassium, calcium, magnesium.

Ambrosia polynnolistnaya - an annual weed of the family Compositae. Its appearance resembles both hemp and wormwood. In July, yellow flowers bloom, “like grape clusters and koi smell of wine,” according to a Russian-language dictionary of the 18th century. Pollen, causing allergies, weed distributes to the most frost.

To fight the plant is difficult. Canted, it quickly sprouts again. To prevent the spread, it is necessary to mow 6-7 times per season, or to pull out with the root. Ambrosia produces over the summer up to one hundred thousand seeds that remain viable for 40 years. Herbicides are considered an effective way to fight. But, as historical experience shows, it is necessary to handle them with care.

In the thirties of the last century, New Zealand newspapers discussed an unprecedented phenomenon - the exploding pants of local farmers. Pants spontaneously exploded anywhere and at any time, causing injury to their owners.

The reason turned out to be in the herbicide, with the help of which the farmers fought against ambrosia and other weeds - sodium chlorate. The substance forms explosive compounds with organic substances. The explosions of farm trousers were caused by combining salt with cotton.

How to lime or completely stop the spread of the plant, scientists do not yet know. Ambrosia is poisoned, weeded and mowed, quarantine measures are conducted, and even owners of sites on which it grows are fined.

All these measures are still ineffective. Let's hope the scientists come up with new ones.

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