Application of herbicides and other physiologically active substances for suppression of liverwort and green mosses at cultivation of ball-rooted coniferous seedlings

The spread of briophytes (liverwort and green mosses) on a surface of the nutritious substratum filling cells of cartridges, is a serious problem at cultivation of ball-rooted coniferous seedlings. This problem for a long time has collided in the countries of Northern America and Europe. In Russia it has arisen last years in connection with expansion of volumes of cultivation of a landing material of ball-rooted pine and spruce in greenhouse complexes. In the present work efficiency of action on mosses and selectivity for ball-rooted pine and spruce seedlings of some chemical substances – herbicides velpar, 90 % SP (active ingredient (a.i.) – hexazinone), pledge, 25 % WP (a.i. – flumioxazine), mogeton, 25 % WP (a.i. – quinoclamine), superstar, 75 % WDG (a.i. – tribenuron-methyl), anchor-85, 75 % WDG (a.i. – sulfometuro-methyl), their mixes, and also cinnamon oil and baking soda. Experiences were carried out in conditions of the closed and open ground in greenhouse complexes of Leningrad region. It was established, that application of the majority of chemical substances in greenhouses was accompanied by damage of pine and spruce seedlings. On hardening grounds velpar, pledge, mogeton, superstar, anchor-85 and also cinnamon oil and baking soda caused effective and both long suppression of liverwort and green mosses in cartridges without damage of seedlings. Presented the schedules of safe and effective application of physiologically active substances on hardening grounds at cultivation of ball-rooted coniferous seedlings.