EXPERIENCE IN THE USE OF HERBICIDES IN THE PRODUCTION OF PLANTING MATERIAL OF ORNAMENTAL CROPS

Abstract

The article presents the results of the use of herbicidal preparations in the production system of seedlings of ornamental trees as a certifi ed planting stock. In the experiment on preparation of the piece of land for laying the nursery, the biological effectiveness of glyphosate (at a maximum dose of up to 6 l/ha) equal to 95-100% growth, imazapyr (maximum dose 2.5 l/ha) equal to 69-100 %. Complete destruction of dicotyledonous, early and late spring weeds (Matricaria sp., Galeopsis sp., Chenopodium album, Stellaria media, etc.), as well as grass (Poa sp., Setaria sp., Elytrigia sp.) was observed. Application of agrotechnical measures provoked the germination of seeds and the destruction of vegetative weeds but not effective against persistent perennial species (Cirsium arvense, Sonchus sp., Tussilago farfara, Ranunculus repens, Stachys palustris, etc.). Held experience to improve the competitiveness of seedlings of coniferous species fi rst and second year relative to the weeds. The use of soil herbicides on the basis of tribenuron-methyl and chlorimuron-ethyl gave a good quality seed material (no deviations compared to control) on the background of high biological effi ciency (up to 92%). The use of the drug on the basis of metsulfuron-methyl caused inhibition of seedling growth and death of the plants of the fi rst and second year of cultivation (more than ¼ of the cases).