h - pigment, preparat foer foerhindrande av lufttfoeroreningarnas skadeverkan pao traed och i give organisk natur samt anvaendning av preparatet.

摘要

The invention relates to preventing growth disturbances and controlling the growth of plants. According to the invention, phytochrome or its structural components, as well as a substance donating electrons are dosed to the plants, or the functioning of the phytochrome is controlled by means of suitable IR-radiation. In this way, the correct annual rhythm of the plants is secured. A suitable electron donator is boron.