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- Title
CHEMICAL AND MECHANICAL METHODS FOR SUPPRESSION OF JERUSALEM ARTICHOKE (HELIANTHUS TUBEROSUS L.).
- Authors
Labant-Hoffmann, Éva; Kazinczi, Gabriella
- Abstract
Jerusalem artichoke (Helianthus tuberosus L.) is considered as a weed of natural conservation areas, but it can occur on arable lands and ruderals, also. The aim of our study was to investigate the efficiency of some chemical and mechanical treatments in small plot experiments under field conditions. Experiments were set up on the south-west part of Hungary (Somogy County), heavily infested with H. tuberosus. The stands were mowed before chemical treatments and the plant residues were left on the field. Chemical treatments in four replications were carried out at 30-40 cm plant height of H. tuberosus. Postemergence treatments were done twice: ps1: 3.7.2013; ps2: 5.9.2013. Treatments were the followings: 1. ps1: 63 g/ha foramsulfuron + 40 g/ha thiencarbazone-methyl + 30 g/ha ciprosulfamid; 2. ps1: 800 g/ha 2,4 D + 1600 g/ha glyphosate isopropilamine salt; 3. ps1: 180 g/ha clopyralid; 4. ps1: 2880 g/ha glyphosate isopropilamine salt; 5. ps2: 2880 g/ha glyphosate isopropilamine salt; 6. ps1: 2880 g/ha glyphosate isopropilamine salt + ps2: 2880 g/ha glyphosate isopropilamine salt; 7. ps2: 800 g/ha 2,4 D + 1600 g/ha glyphosate isopropilamine salt; 8. mowing three times; 9. mowing twice; 10. untreated control. The highest dosages permitted for perennial dicots were used. Weed control efficacy was evaluated 12, 22 and 66 days after the first chemical treatments (DAT) and 48 days after the second treatments, respectively. The air-dry weight of underground plant parts (including roots, stolons and tubers also) was measured on 23. 10. 2013 (17 weeks after the first post-emergence treatments). It can be concluded that post-emergence treatments applied later showed the highest efficacy. The optimal time for H. tuberosus control was the end of August-beginning of September when the metabolism activity of the underground plant parts showed the highest activity.
- Subjects
HUNGARY; WEED control; JERUSALEM artichoke; HERBICIDE application; NATURE reserves; EXPERIMENTS
- Publication
Herbologia, 2014, Vol 14, Issue 1, p63
- ISSN
1840-0809
- Publication type
Article
- DOI
10.5644/Herb.14.1.07