Abstract
This study aimed to evaluate the temporal dynamic of 'Gala' leaf spot under conventional and organic systems of production in edafoclimatic conditions of Santa Catarina plateau. The incidence and severity were quantified biweekly in 100 leaves distributed in four branches of the "Royal Gala" cultivar with 12 replications, generating 16 maps for each system of production. The disease severity was evaluated in accordance with the specific diagrammatic scale. Curves of disease progress were made and the epidemics compared according to: a) the beginning of symptoms appearance (BSA); b) the time to reach the maximum disease intensity and severity (TRMDI and TRMDS); c) the maximum value of disease intensity and severity (I<inf>max</inf> and S<inf>max</inf>); and d) area under the incidence and severity disease progress curve (AUIPCI and AUSDPC). The incidence and severity data were analyzed by linear regression, adjusted for three empirical models, Logistic, Monomolecular and Gompertz. The 'Royal Gala' cultivar was susceptible to Colletotrichum spp. and the highest disease intensity was observed in the organic than in conventional system of production. The Logistic epidemiological model was the most appropriate to describe the disease progress curve and, there is no significant difference between systems when used only incidence value. The severity progress rate (r) was significantly higher in the organic than in the conventional system of production.
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Claims 5
Claim · model-written summary
Royal Gala was susceptible to Colletotrichum spp.
- Taxon
- Royal Galae0
- Material
- Royal Galae0
- Interactor
- Colletotrichum spp.
Colletotrichume0pathogen - Outcome
- susceptible to Colletotrichum spp.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 'Royal Gala' cultivar was susceptible to Colletotrichum spp.”
Claim · model-written summary
Disease intensity was higher in organic than conventional production.
- Taxon
- apples
Malus domesticat0 - Treatment
- organice0
- Outcome
- disease intensitye0
- Direction
- higheste0
- Comparator
- conventional system of productione0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“apples”
e0“the highest disease intensity was observed in the organic than in conventional system of production”
Claim · model-written summary
The Logistic model best described the disease progress curve.
- Taxon
- applesMalus domesticat0
- Outcome
- most appropriate to describe the disease progress curvee0
- Comparator
- Logistic epidemiological modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“apples”
e0“The Logistic epidemiological model was the most appropriate to describe the disease progress curve”
Claim · model-written summary
Incidence values alone showed no significant difference between production systems.
- Taxon
- applesMalus domesticat0
- Outcome
- incidence valuee0
- Direction
- no significant differencee0
- Comparator
- systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“apples”
e0“there is no significant difference between systems when used only incidence value”
Claim · model-written summary
Severity progress rate was significantly higher in organic than conventional production.
- Taxon
- applesMalus domesticat0
- Treatment
- organice0
- Outcome
- severity progress rate (r)e0
- Direction
- highere0
- Comparator
- conventional system of productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“apples”
e0“The severity progress rate (r) was significantly higher in the organic than in the conventional system of production.”
The same questions in other papers
cultivation system · disease · Malus domestica (apple)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
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See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.