Abstract
The efficacy of fosetyl-Al (soil drench), metalaxyl-M (soil drench), fluazinam (soil drench) and potassium phosphonate (foliar spray) in controlling Phytophthora cinnamomi root infections of Leucospermum cvv. High Gold, Sunrise and Spider was compared. The Leucospermum plants were potted, placed in a fibreglass tunnel and inoculated. Fungicide treatments began 4 weeks after inoculation. Stem lesion length was measured and the degree of leaf chlorosis as well as root rot were rated at the conclusion of the experiment The pathogen was re-isolated from the root and crown of each plant, and soil baiting and dilutions were done to monitor soil populations of P. cinnamomi. During the 1997 season, metalaxyl-M gave the best control compared with the other treatments. The combination of metalaxyl-M with cv. Spider completely suppressed symptom development. However, during the 1998 season when climatic conditions were favourable for disease development, no differences were observed between the treatments and the control. Cv. Spider had higher tolerance against the fungus even with the most aggressive isolate and during the warmer 1998 season, indicating the importance of combining chemical control with plant resistance. None of the treatments showed any phytotoxicity.
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Claims 5
Claim · model-written summary
Metalaxyl-M gave the best control among treatments in 1997.
- Taxon
- Leucospermum
Leucospermume1 - Treatment
- metalaxyl-Me0
- Interactor
- Phytophthora cinnamomi
Phytophthora cinnamomie1pathogen - Outcome
- best controle0
- Direction
- beste0
- Comparator
- the other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the 1997 season, metalaxyl-M gave the best control compared with the other treatments.”
e1“Phytophthora cinnamomi root infections of Leucospermum”
Claim · model-written summary
Metalaxyl-M with cv. Spider completely suppressed symptom development.
- Taxon
- LeucospermumLeucospermume1
- Material
- cv. Spidere0
- Treatment
- metalaxyl-Me0
- Interactor
- Phytophthora cinnamomiPhytophthora cinnamomie1pathogen
- Outcome
- symptom developmente0
- Direction
- completely suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of metalaxyl-M with cv. Spider completely suppressed symptom development.”
e1“Phytophthora cinnamomi root infections of Leucospermum”
Claim · model-written summary
In 1998, treatments did not differ from the control when climate favored disease.
- Taxon
- LeucospermumLeucospermume1
- Treatment
- the treatmentse0
- Interactor
- Phytophthora cinnamomiPhytophthora cinnamomie1pathogen
- Outcome
- disease developmente0
- Direction
- no differencese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during the 1998 season when climatic conditions were favourable for disease development, no differences were observed between the treatments and the control.”
e1“Phytophthora cinnamomi root infections of Leucospermum”
Claim · model-written summary
Cv. Spider had higher tolerance even with the most aggressive isolate and in the warmer 1998 season.
- Taxon
- LeucospermumLeucospermume1
- Material
- Cv. Spidere0
- Interactor
- Phytophthora cinnamomiPhytophthora cinnamomie1pathogen
- Outcome
- tolerance against the funguse0
- Direction
- highere0
- Qualifier
- even with the most aggressive isolate and during the warmer 1998 seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cv. Spider had higher tolerance against the fungus even with the most aggressive isolate and during the warmer 1998 season”
e1“Phytophthora cinnamomi root infections of Leucospermum”
Claim · model-written summary
None of the treatments showed phytotoxicity.
- Taxon
- LeucospermumLeucospermume1
- Treatment
- the treatmentse0
- Outcome
- phytotoxicitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the treatments showed any phytotoxicity.”
e1“Phytophthora cinnamomi root infections of Leucospermum”