Claim · model-written summary
Twice yearly DCPA 10 lb/ac gave at least 70% weed control each year without apparent growth retardation.
- Taxon
- three speciese0
- Treatment
- DCPA (dimethyl 2,3,5,6‐tetrachloroterephthalate) 10 lb/ace0
- Outcome
- controle0
- Direction
- no apparent growth retardatione0
- Value
- 70%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Verbatim
e0“70% or more control each year with no apparent growth retardation over the 2‐year period of the three species tested were: single yearly applications of neburon 4 lb/ac or linuron 2 lb/ac, two applications each year of DCPA (dimethyl 2,3,5,6‐tetrachloroterephthalate) 10 lb/ac”
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 Severe weed competition significantly reduced conifer shoot height and fresh weight.
- 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 Directed sodium pentachlorophenate 15 lb/ac gave at least 70% weed control each year without apparent growth retardation.