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Weed control in rose-scented geranium (Pelargonium spp).
- Source :
-
Pest management science [Pest Manag Sci] 2002 Dec; Vol. 58 (12), pp. 1254-8. - Publication Year :
- 2002
-
Abstract
- Abstract: Field investigations were carried out during 1999 and 2000 to identify effective chemical/ cultural methods of weed control in rose-scented geranium (Pelargonium spp). The treatments comprised pre-emergence applications of oxyfluorfen (0.15, 0.20 and 0.25 kg AI ha(-1)) and pendimethalin (0.50, 0.75 and 1.00kg AI ha(-1)), successive hand weeding, hoeing and mulching using spent of lemon grass (at 5 tonnes ha(-1)) 45 days after planting (DAP), three hand-weedings 30, 60 and 90 DAP, weed-free (frequent manual weeding) and weedy control. Broad-leaf weeds were more predominant than grass and sedge weeds, accounting for 85.8% weed density and 93.0% weed dry weight in 1999 and 77.2% weed density and 93.9% weed dry weight in 2000. Unrestricted weed growth significantly reduced geranium oil yield, by 61.6% and 70.6% in 1999 and 2000, respectively. Pre-emergence application of pendimethalin (0.75-1.00 kgAI ha(-1)) or oxyfluorfen (0.25 kg AI ha(-1)), successive hand-weeding, hoeing and mulching and three hand-weedings were highly effective in reducing weed density and dry weight and gave oil yield comparable to the weed-free check. Application of oxyfluorfen (0.15 or 0.20 kg AI ha(-1)) and pendimethalin (0.50 kg AI ha(-1)) were less effective in controlling the weed species in geranium. None of the herbicides impaired the quality of rose-scented geranium oil measured in terms of citronellol and geraniol content.
- Subjects :
- Acyclic Monoterpenes
Aizoaceae drug effects
Amaranthus drug effects
Aniline Compounds administration & dosage
Aniline Compounds chemistry
Aniline Compounds toxicity
Chenopodium drug effects
Cyperus drug effects
Dose-Response Relationship, Drug
Halogenated Diphenyl Ethers
Herbicides administration & dosage
Herbicides chemistry
Melilotus drug effects
Monoterpenes metabolism
Pelargonium metabolism
Phenyl Ethers administration & dosage
Phenyl Ethers chemistry
Phenyl Ethers toxicity
Poaceae drug effects
Terpenes metabolism
Herbicides toxicity
Pelargonium growth & development
Plant Oils metabolism
Plants drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1526-498X
- Volume :
- 58
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Pest management science
- Publication Type :
- Academic Journal
- Accession number :
- 12477000
- Full Text :
- https://doi.org/10.1002/ps.592