Claim · model-written summary
Damage by key economic pests did not differ significantly between the systems in any year.
- Taxon
- apple
Malus domesticae0 - Outcome
- Key sconomic pest damagee1
- Direction
- did not differ significantlye1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conventional and organic semidwarf Granny Smith apple production systems were compared during 3 years of conversion to certified organic management on California's Central Coast”
e1“Key sconomic pest damage did not differ significantly in any year”
Title
In Santa Cruz County, Granny Smith conversions to organic show early success
Sean L. Swezey; Jim Rider; Matthew R. Werner; et al. California Agriculture 1994. doi:10.3733/ca.v048n06p36
Other claims from this paper (8)
- Intervention effect Apple yields were significantly higher in the organic than in the conventional production system in 1989 and 1991.
- Intervention effect Fruit load was significantly greater in the organic than in the conventional apple system, accounting for the higher yields in 1989 and 1991.
- Intervention effect Growth indicators such as tree girth, terminal growth and leaf area did not generally differ between the organic and conventional apple systems.
- Observation Tissue nitrogen levels were generally higher in leaf and new wood bark tissue in the conventional system than in the organic system.
- Observation Tissue phosphorus levels were generally higher in organically managed apple trees than in the conventional system.
- Observation Fruit and leaf damage by some secondary lepidopterous pests was greater in some years in the conventional system.
- Observation Apple leaf hoppers caused significantly greater leaf damage in the organic system.
- Observation Price premiums for organic apples consistently produced a higher per-acre return for the organic system.