Claim · model-written summary
NDD(female symbol) and NDD(e+J) were linearly related, r(2) = 0.97.
- Taxon
- alfalfa
Medicago sativae0 - Interactor
- Meloidogyne hapla
Meloidogyne haplae0pest - Outcome
- NDD(female symbol)e5
- Qualifier
- r(2) = 0.97e5
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of Meloidogyne hapla on alfalfa (Medicago sativa) yield was described by a multiple point damage model”
e5“Cumulative area under the combined eggs (e) and juvenile (J) population curve (NDD(e+J)) and NDD(female symbol) were linearly related (r(2) = 0.97)”
Title
Nematode-degree days, a density-time model for relating epidemiology and crop losses in perennials.
J W Noling; H Ferris PubMed 1987
Other claims from this paper (5)
- Association NDD(female symbol) increased exponentially over physiological time at rates relative to the initial M. hapla population density.
- Observation Dosage accumulation rates of 213 to 272 NDD(female symbol) per degree day did not differ among six initial population levels.
- Association Cumulative yield reductions increased linearly with NDD to 50% of M. hapla-free controls and were well correlated for the six initial population levels.
- Intervention effect Alfalfa yields were reduced to 65% of nematode-free controls under prolonged exposure to M. hapla.
- Association Alfalfa yield reductions were adequately described by NDD model estimates of eggs and juveniles or of adult females.