Abstract
Hwang, S. F., Cao, T., Xiao, Q., Ahmed, H. U., Manolii, V. P., Turnbull, G. D., Gossen, B. D., Peng, G. and Strelkov, S. E. 2012. Effects of fungicide, seeding date and seedling age on clubroot severity, seedling emergence and yield of canola. Can. J. Plant Sci. 92: 1175–1186. The infestation of seeds by Plasmodiophora brassicae can result in the transmission of clubroot disease in canola. Five fungicides, including Dynasty 100 FS (azoxystrobin), Helix Xtra (thiamethoxam+difenoconazole+metataxyl+fludioxonil), Nebijin TM 5SC (flusulfamide), Prosper FX (clothianidin+carbathiin+trifloxystrobin+metalaxyl), and Vitavax RS (carbathiin+thiram), were evaluated under greenhouse conditions using artificially infested canola seeds for their efficacy in eliminating seed-borne inoculum. All of the fungicides significantly reduced clubroot relative to the non-treated control, but Nebijin TM 5SC and Dynasty 100 FS were the most effective. However, in field trials with Cruiser 5 FS (thiamethoxam), Helix Xtra, Dynasty, Prosper and Sedaxane (pyrazole anilide) applied alone or as a mixture, none of the treatments reduced clubroot severity or improved seedling emergence or yield compared with the insecticidal control (Cruiser 5 FS) in the susceptible cultivar. Clubroot severity was lower in early-seeded canola compared with the late-seeded crops in 2 site-years. The younger seedlings had greater disease severity and reduced plant height and yield than did older seedlings in both resistant and susceptible canola cultivars. We conclude that a combination of approaches including seed treatments and manipulation of seeding dates in conjunction with deployment of resistant cultivars is necessary for the sustainable management of clubroot in canola.
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Claims 11
Claim · model-written summary
All tested fungicides reduced clubroot relative to untreated control in greenhouse trials.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napust0 - Treatment
- All of the fungicidese0
- Interactor
- Plasmodiophora brassicae
.jpg?width=60)
Plasmodiophora brassicaee1pathogen - Outcome
- clubroote0
- Direction
- reducede0
- Comparator
- non-treated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
.jpg?width=500)
Verbatim
e0“All of the fungicides significantly reduced clubroot relative to the non-treated control, but Nebijin TM 5SC and Dynasty 100 FS were the most effective.”
t0“canola”
e1“The infestation of seeds by Plasmodiophora brassicae can result in the transmission of clubroot disease in canola.”
Claim · model-written summary
Nebijin TM 5SC was among the most effective fungicides against clubroot.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Nebijin TM 5SCe0
- Outcome
- clubroote0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All of the fungicides significantly reduced clubroot relative to the non-treated control, but Nebijin TM 5SC and Dynasty 100 FS were the most effective.”
t0“canola”
Claim · model-written summary
Dynasty 100 FS was among the most effective fungicides against clubroot.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Dynasty 100 FSe0
- Outcome
- clubroote0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All of the fungicides significantly reduced clubroot relative to the non-treated control, but Nebijin TM 5SC and Dynasty 100 FS were the most effective.”
t0“canola”
Claim · model-written summary
Field fungicide treatments did not improve clubroot severity relative to Cruiser 5 FS in the susceptible cultivar.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Helix Xtra, Dynasty, Prosper and Sedaxanee0
- Outcome
- clubroot severitye0
- Direction
- none of the treatments reducede0
- Comparator
- insecticidal control (Cruiser 5 FS)e0
- Setting
- field trialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in field trials with Cruiser 5 FS (thiamethoxam), Helix Xtra, Dynasty, Prosper and Sedaxane (pyrazole anilide) applied alone or as a mixture, none of the treatments reduced clubroot severity or improved seedling emergence or yield compared with the insecticidal control (Cruiser 5 FS) in the susceptible cultivar.”
t0“canola”
Claim · model-written summary
Field fungicide treatments did not improve seedling emergence relative to Cruiser 5 FS in the susceptible cultivar.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Helix Xtra, Dynasty, Prosper and Sedaxanee0
- Outcome
- seedling emergencee0
- Direction
- none of the treatments reduced clubroot severity or improvede0
- Comparator
- insecticidal control (Cruiser 5 FS)e0
- Setting
- field trialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in field trials with Cruiser 5 FS (thiamethoxam), Helix Xtra, Dynasty, Prosper and Sedaxane (pyrazole anilide) applied alone or as a mixture, none of the treatments reduced clubroot severity or improved seedling emergence or yield compared with the insecticidal control (Cruiser 5 FS) in the susceptible cultivar.”
t0“canola”
Claim · model-written summary
Field fungicide treatments did not improve yield relative to Cruiser 5 FS in the susceptible cultivar.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Helix Xtra, Dynasty, Prosper and Sedaxanee0
- Outcome
- yielde0
- Direction
- none of the treatments reduced clubroot severity or improvede0
- Comparator
- insecticidal control (Cruiser 5 FS)e0
- Setting
- field trialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in field trials with Cruiser 5 FS (thiamethoxam), Helix Xtra, Dynasty, Prosper and Sedaxane (pyrazole anilide) applied alone or as a mixture, none of the treatments reduced clubroot severity or improved seedling emergence or yield compared with the insecticidal control (Cruiser 5 FS) in the susceptible cultivar.”
t0“canola”
Claim · model-written summary
Early seeding lowered clubroot severity in two site years.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- early-seedede0
- Outcome
- Clubroot severitye0
- Direction
- lowere0
- Value
- 2 site-yearse0
- Comparator
- late-seeded cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clubroot severity was lower in early-seeded canola compared with the late-seeded crops in 2 site-years.”
Claim · model-written summary
Younger seedlings had greater disease severity than older seedlings.
- Taxon
- canolaBrassica napus var. napuse0
- Organ / stage
- younger seedlingse0
- Outcome
- disease severitye0
- Direction
- greatere0
- Qualifier
- both resistant and susceptible canola cultivarse0
- Comparator
- older seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The younger seedlings had greater disease severity and reduced plant height and yield than did older seedlings in both resistant and susceptible canola cultivars.”
Claim · model-written summary
Younger seedlings had reduced plant height than older seedlings.
- Taxon
- canolaBrassica napus var. napuse0
- Organ / stage
- younger seedlingse0
- Outcome
- plant heighte0
- Direction
- reducede0
- Qualifier
- both resistant and susceptible canola cultivarse0
- Comparator
- older seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The younger seedlings had greater disease severity and reduced plant height and yield than did older seedlings in both resistant and susceptible canola cultivars.”
Claim · model-written summary
Younger seedlings had reduced yield than older seedlings.
- Taxon
- canolaBrassica napus var. napuse0
- Organ / stage
- younger seedlingse0
- Outcome
- yielde0
- Direction
- reducede0
- Qualifier
- both resistant and susceptible canola cultivarse0
- Comparator
- older seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The younger seedlings had greater disease severity and reduced plant height and yield than did older seedlings in both resistant and susceptible canola cultivars.”
Claim · model-written summary
The authors recommend combining seed treatment, seeding date management and resistant cultivars for sustainable clubroot management.
- Taxon
- canolaBrassica napus var. napuse0
- Outcome
- a combination of approaches including seed treatments and manipulation of seeding dates in conjunction with deployment of resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that a combination of approaches including seed treatments and manipulation of seeding dates in conjunction with deployment of resistant cultivars is necessary for the sustainable management of clubroot in canola.”
The same questions in other papers
fungicide · Plasmodiophora brassicae · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- negative
sowing time · disease · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
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.