Claim · model-written summary
Severe weed competition significantly reduced conifer shoot height and fresh weight.
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Verbatim
e0“severe weed competition caused an overall reduction in growth with significant reductions in stem diameter and in height and fresh weight of shoots”
Title
EFFECTS OF CHEMICAL WEED CONTROL ON THE GROWTH PATTERNS OF CONIFER TRANSPLANTS
R. GROVER Weed Research 1967. doi:10.1111/j.1365-3180.1967.tb01363.x
Other claims from this paper (13)
- Observation Picea glauca required at least 60% weed control for optimal growth.
- Observation Picea pungens required at least 60% weed control for optimal growth.
- Observation Pinus sylvestris grew optimally with average weed control as low as 40%.
- Observation Under irrigated nursery conditions, weed competition did not affect survival percentage of the three conifer species.
- Association Absence of visual injury did not indicate a conifer species’ herbicide tolerance.
- Observation Severe weed competition reduced conifer stem diameter significantly.
- Observation Herbicide toxicity reduced some, but not necessarily all, measures of height, fresh weight and stem diameter.
- Observation Initial survival was affected only by herbicides highly toxic at the applied doses.
- Observation Growth differences caused by weed competition or herbicide toxicity generally appeared after the second year.
- Intervention effect Annual neburon 4 lb/ac gave at least 70% weed control each year without apparent growth retardation.
- Intervention effect Annual linuron 2 lb/ac gave at least 70% weed control each year without apparent growth retardation.
- Intervention effect Twice yearly DCPA 10 lb/ac gave at least 70% weed control each year without apparent growth retardation.
- Intervention effect Directed sodium pentachlorophenate 15 lb/ac gave at least 70% weed control each year without apparent growth retardation.