Claim · model-written summary
The authors recommended early summer foliar artificial-hormone spray for small woody sprouts, except possibly aspen.
- Taxon
- woody plantse0
- Treatment
- spraying their foliage with artificial hormones early in summere0
- Outcome
- destroy small sproutse0
- Qualifier
- probably with the exception of aspene0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Verbatim
e0“probably with the exception of aspen, even advisable to destroy small sprouts, 0.5—1.5 m. in height, of these woody plants by spraying their foliage with artificial hormones early in summer”
Title
On eradication of woody plants with herbicides in fields and pastures
Jaakko Mukula Agricultural and Food Science 1950. doi:10.23986/afsci.71275
Other claims from this paper (19)
- Intervention effect Esters of 2,4-D were the most effective spray treatment.
- Intervention effect Other artificial hormones also gave satisfactory spray results.
- Observation Required spray concentration varied by woody species from 0.1 to 0.4% active substance.
- Observation A single application was difficult to make sufficiently effective.
- Recommendation Authors recommended a second control spray after 2—3 weeks.
- Association Treatment was most effective in warm sunny weather.
- Association Spraying was best at the end of June or beginning of July.
- Intervention effect Early spring treatment led to many new sprouts.
- Intervention effect Late summer artificial hormones did not kill leaves effectively.
- Observation Leaves on young sprouts and suckers died more readily than on old trees and shrubs.
- Intervention effect One summer of spraying could almost completely prevent alder regeneration, unless sprouts grew from tall-tree stumps.
- Observation Willow, birch, mountain ash and aspen often regenerated slightly the next summer.
- Intervention effect Chlorate and chresol killed sprout leaves but did not stop new sprout development.
- Intervention effect Aqueous artificial hormones were effectively absorbed through a cut alder branch.
- Intervention effect Water-insoluble artificial hormones were not absorbed through cut branches.
- Association Lower-concentration solutions were absorbed more easily than higher-concentration solutions.
- Intervention effect Cut-branch treatment killed relatively tall alders and their roots but failed on other tall woody species when applied to one branch.
- Mechanism Stopping transpiration by cutting above the absorbing branch drove substance toward alder roots.
- Intervention effect Soil applications of hormones, chlorate and chresol did not satisfactorily destroy woody plants at reasonable cost.