Abstract
Effect of calcium and nitrogen fertilization on bacterial canker susceptibility in stone fruits. Abstract -Introduction. Bacterial canker, caused by Pseudomonas syringae pv. syringae, is a destructive disease where stone fruit trees are cultivated. The efficacy of nitrogen and calcium fertilization on bacterial canker susceptibility was evaluated in stone fruits. Materials and methods. Field experiments were conducted to study the efficacy of foliar applications of calcium nitrate, and ground fertilization with CAN-17 plus low-biuret urea foliar spray on bacterial susceptibility in 'Riegel' peach, 'French' prune and 'Nonpareil' almond growing in ring nematode-infested and nematicide-fumigated soils. Host susceptibility was evaluated by measuring the length of lesions developed following inoculation with P. syringae pv. syringae. Results and discussion. Foliar applications of Ca(NO 3 ) 2 significantly increased leaf nitrogen and bark calcium concentrations in peach trees growing in both fumigated and nonfumigated areas. Peach trees growing in nonfumigated areas developed significantly longer lesions than trees growing in fumigated areas. However, Ca(NO 3 ) 2 foliar applications had no effect in decreasing peach susceptibility to bacterial infection in both nonfumigated and fumigated areas. After inoculation, diseased prune trees developed significantly longer lesions than healthy trees. Leaf and bark calcium concentrations of diseased prune were significantly increased after Ca(NO 3 ) 2 foliar sprays, but again the treatments did not significantly affect prune susceptibility to bacterial infection. However, nitrogen fertilization with CAN-17 and urea significantly increased the bark nitrogen concentration of almond trees, and these trees had significantly smaller lesions than those not receiving nitrogen fertilization. Foliar application of calcium (Nutri-Cal) did not affect almond susceptibility to bacterial canker. Collectively, these data support the previous hypothesis that increased susceptibility of stone fruits to P. syringae pv. syringae under nematode infestation conditions is mediated by both nitrogen effects and nitrogenindependent effects, and application of ammonium nitrogen may have some beneficial effects in reducing stone fruit susceptibility to bacterial canker where ring nematode infestation prevails. USA / Prunus persica / Prunus avium / Prunus domestica / plant diseases / Pseudomonas syringae / plant nematodes / Mesocriconema xenoplax / cultivation Effet de la fertilisation calcique et azote sur la sensibilit au chancre bactrien des arbres fruitiers noyau.
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Claims 13
Claim · model-written summary
Calcium nitrate raised peach leaf nitrogen.
- Taxon
- peach
Prunus persicae0 - Treatment
- Ca(NO 3 ) 2e0
- Outcome
- leaf nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar applications of Ca(NO 3 ) 2 significantly increased leaf nitrogen and bark calcium concentrations in peach trees growing in both fumigated and nonfumigated areas.”
Claim · model-written summary
Calcium nitrate raised peach bark calcium.
- Taxon
- peachPrunus persicae0
- Treatment
- Ca(NO 3 ) 2e0
- Outcome
- bark calcium concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar applications of Ca(NO 3 ) 2 significantly increased leaf nitrogen and bark calcium concentrations in peach trees growing in both fumigated and nonfumigated areas.”
Claim · model-written summary
Nonfumigated peach trees had longer lesions than fumigated trees.
- Taxon
- PeachPrunus persicae0
- Treatment
- nonfumigated arease0
- Interactor
- Pseudomonas syringae pv. syringae
Pseudomonas syringae pv. syringaee1pathogen - Outcome
- lesionse0
- Direction
- longere0
- Comparator
- fumigated arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peach trees growing in nonfumigated areas developed significantly longer lesions than trees growing in fumigated areas.”
e1“caused by Pseudomonas syringae pv. syringae”
Claim · model-written summary
Calcium nitrate did not decrease peach bacterial susceptibility.
- Taxon
- peachPrunus persicae0
- Treatment
- Ca(NO 3 ) 2 foliar applicationse0
- Outcome
- peach susceptibility to bacterial infectione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca(NO 3 ) 2 foliar applications had no effect in decreasing peach susceptibility to bacterial infection in both nonfumigated and fumigated areas.”
Claim · model-written summary
Diseased prune trees developed longer lesions than healthy trees.
Verbatim
e0“After inoculation, diseased prune trees developed significantly longer lesions than healthy trees.”
Claim · model-written summary
Calcium sprays raised diseased prune leaf calcium.
- Taxon
- prunee0
- Treatment
- Ca(NO 3 ) 2 foliar sprayse0
- Outcome
- Leaf and bark calcium concentrationse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Leaf and bark calcium concentrations of diseased prune were significantly increased after Ca(NO 3 ) 2 foliar sprays”
Claim · model-written summary
Calcium sprays raised diseased prune bark calcium.
- Taxon
- prunee0
- Treatment
- Ca(NO 3 ) 2 foliar sprayse0
- Outcome
- bark calcium concentrationse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Leaf and bark calcium concentrations of diseased prune were significantly increased after Ca(NO 3 ) 2 foliar sprays”
Claim · model-written summary
Calcium sprays did not significantly affect prune bacterial susceptibility.
Not reportedComparatorDirection
Verbatim
e0“the treatments did not significantly affect prune susceptibility to bacterial infection.”
Claim · model-written summary
Nitrogen fertilization increased almond bark nitrogen.
- Taxon
- almond
Prunus dulcise0 - Treatment
- CAN-17 and ureae0
- Outcome
- bark nitrogen concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen fertilization with CAN-17 and urea significantly increased the bark nitrogen concentration of almond trees”
Claim · model-written summary
Nitrogen-treated almonds had smaller lesions.
- Taxon
- almondPrunus dulcise1
- Treatment
- nitrogen fertilizatione0
- Outcome
- lesionse0
- Direction
- smallere0
- Comparator
- those not receiving nitrogen fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these trees had significantly smaller lesions than those not receiving nitrogen fertilization.”
e1“bark nitrogen concentration of almond trees”
Claim · model-written summary
Nutri-Cal did not affect almond canker susceptibility.
- Taxon
- almondPrunus dulcise0
- Treatment
- calcium (Nutri-Cal)e0
- Outcome
- almond susceptibility to bacterial cankere0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of calcium (Nutri-Cal) did not affect almond susceptibility to bacterial canker.”
Claim · model-written summary
Authors infer nitrogen-dependent and independent effects under nematode infestation.
- Taxon
- stone fruitse0
- Interactor
- P. syringae pv. syringaePseudomonas syringae pv. syringaee0pathogen
- Outcome
- increased susceptibilitye0
- Qualifier
- both nitrogen effects and nitrogenindependent effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased susceptibility of stone fruits to P. syringae pv. syringae under nematode infestation conditions is mediated by both nitrogen effects and nitrogenindependent effects”
Claim · model-written summary
Authors suggest ammonium nitrogen may reduce canker susceptibility in infested orchards.
Verbatim
e0“application of ammonium nitrogen may have some beneficial effects in reducing stone fruit susceptibility to bacterial canker where ring nematode infestation prevails.”
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See all 13 papers →nitrogen · nutrient: content · Prunus dulcis (almond)Positive and negative results
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See all 20 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.