Abstract
Summary Light leaf spot, caused by Pyrenopeziza brassicae, was assessed regularly on double‐low cultivars of winter oilseed rape during field experiments at Rothamsted in 1990‐91 and 1991‐92. Previous cropping and fungicide applications differed; seed yield and seed quality were measured at harvest. In each season, both the initial incidence of light leaf spot and the rate of disease increase were greater in oilseed rape crops sown after rape than those sown after cereals. The incidence of diseases caused by Phoma lingam or Alternaria spp. was also greater in second oilseed rape crops. In 1991‐92 there was 42% less rainfall between September and March than in 1990‐91, and much less light leaf spot developed. However, P. lingam and Alternaria spp. were more common. Only fungicide application schedules including an autumn spray decreased the incidence of light leaf spot on leaves, stems and pods, as indicated by decreased areas under the disease progress curves (AUDPC) and slower rates of disease increase. Summer sprays decreased incidence and severity of light leaf spot on pods only. In 1990‐91, all fungicide treatments which included an autumn spray increased seed and oil yields of cv. Capricorn but only the treatment which included autumn, spring and summer sprays increased yields of cv. Falcon. No treatment increased the yields of cv. Capricorn or cv. Falcon in 1991‐92. Fungicide applications decreased glucosinolate concentrations in the seed from a crop of cv. Cobra severely infected by P. brassicae in 1990‐91, but did not increase yield.
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Claims 15
Claim · model-written summary
Rape after rape had greater initial light leaf spot incidence than rape after cereals.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- sown after rapee0
- Interactor
- light leaf spote0pathogen
- Outcome
- initial incidence of light leaf spote0
- Direction
- greatere0
- Comparator
- those sown after cerealse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“both the initial incidence of light leaf spot and the rate of disease increase were greater in oilseed rape crops sown after rape than those sown after cereals”
Claim · model-written summary
Rape after rape had a greater rate of light leaf spot increase.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- sown after rapee0
- Outcome
- rate of disease increasee0
- Direction
- greatere0
- Comparator
- those sown after cerealse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both the initial incidence of light leaf spot and the rate of disease increase were greater in oilseed rape crops sown after rape than those sown after cereals”
Claim · model-written summary
Second rape crops had greater incidence of Phoma lingam disease.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- second oilseed rape cropse0
- Interactor
- Phoma lingam
Plenodomus lingame0pathogen - Outcome
- incidence of diseases caused by Phoma lingame0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of diseases caused by Phoma lingam or Alternaria spp. was also greater in second oilseed rape crops”
Claim · model-written summary
Second rape crops had greater incidence of Alternaria disease.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- second oilseed rape cropse0
- Interactor
- Alternaria spp.
Alternariae0pathogen - Outcome
- incidence of diseases caused by Phoma lingam or Alternaria spp.e0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of diseases caused by Phoma lingam or Alternaria spp. was also greater in second oilseed rape crops”
Claim · model-written summary
Less light leaf spot developed in the drier 1991–92 season.
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- light leaf spote0
- Direction
- lesse0
- Value
- 42%e0
- Qualifier
- less rainfall between September and Marche0
- Comparator
- 1990‐91e0
- Setting
- 1991‐92e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1991‐92 there was 42% less rainfall between September and March than in 1990‐91, and much less light leaf spot developed”
t0“winter oilseed rape”
Claim · model-written summary
Phoma lingam and Alternaria were more common in 1991–92.
- Taxon
- winter oilseed rapeBrassica napust0
- Interactor
- P. lingamPlenodomus lingame0pathogen
- Second interactor
- Alternaria spp.Alternariae0pathogen
- Outcome
- P. lingam and Alternaria spp.e0
- Direction
- more commone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, P. lingam and Alternaria spp. were more common”
t0“winter oilseed rape”
Claim · model-written summary
Schedules with an autumn spray reduced light leaf spot on leaves, stems and pods.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- fungicide application schedules including an autumn spraye0
- Interactor
- light leaf spote0pathogen
- Outcome
- incidence of light leaf spot on leaves, stems and podse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only fungicide application schedules including an autumn spray decreased the incidence of light leaf spot on leaves, stems and pods, as indicated by decreased areas under the disease progress curves (AUDPC) and slower rates of disease increase”
t0“winter oilseed rape”
Claim · model-written summary
Autumn spray schedules lowered disease progress area and slowed disease increase.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- fungicide application schedules including an autumn spraye0
- Outcome
- areas under the disease progress curves (AUDPC) and slower rates of disease increasee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fungicide application schedules including an autumn spray decreased the incidence of light leaf spot on leaves, stems and pods, as indicated by decreased areas under the disease progress curves (AUDPC) and slower rates of disease increase”
t0“winter oilseed rape”
Claim · model-written summary
Summer sprays reduced pod light leaf spot incidence and severity only.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- Summer sprayse0
- Outcome
- incidence and severity of light leaf spot on podse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Summer sprays decreased incidence and severity of light leaf spot on pods only”
t0“winter oilseed rape”
Claim · model-written summary
Autumn-containing fungicide treatments increased Capricorn seed and oil yields in 1990–91.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Capricorne0
- Treatment
- all fungicide treatments which included an autumn spraye0
- Outcome
- seed and oil yieldse0
- Direction
- increasede0
- Setting
- 1990‐91e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1990‐91, all fungicide treatments which included an autumn spray increased seed and oil yields of cv. Capricorn”
t0“winter oilseed rape”
Claim · model-written summary
Only the three-season spray schedule raised Falcon yields in 1990–91.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Falcone0
- Treatment
- autumn, spring and summer sprayse0
- Outcome
- yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the treatment which included autumn, spring and summer sprays increased yields of cv. Falcon”
t0“winter oilseed rape”
Claim · model-written summary
No treatment raised Capricorn yields in 1991–92.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Capricorne0
- Treatment
- No treatmente0
- Outcome
- yieldse0
- Direction
- increasede0
- Setting
- 1991‐92e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No treatment increased the yields of cv. Capricorn or cv. Falcon in 1991‐92”
t0“winter oilseed rape”
Claim · model-written summary
No treatment raised Falcon yields in 1991–92.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Falcone0
- Treatment
- No treatmente0
- Outcome
- yieldse0
- Direction
- increasede0
- Setting
- 1991‐92e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No treatment increased the yields of cv. Capricorn or cv. Falcon in 1991‐92”
t0“winter oilseed rape”
Claim · model-written summary
Fungicide reduced seed glucosinolate concentrations in infected Cobra without increasing yield.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Cobrae0
- Treatment
- Fungicide applicationse0
- Interactor
- P. brassicaePyrenopeziza brassicaee0pathogen
- Outcome
- glucosinolate concentrations in the seede0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide applications decreased glucosinolate concentrations in the seed from a crop of cv. Cobra severely infected by P. brassicae in 1990‐91, but did not increase yield”
t0“winter oilseed rape”
Claim · model-written summary
Fungicide did not increase yield of infected Cobra.
- Taxon
- winter oilseed rapeBrassica napust0
- Material
- cv. Cobrae0
- Treatment
- Fungicide applicationse0
- Interactor
- P. brassicaePyrenopeziza brassicaee0pathogen
- Outcome
- yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide applications decreased glucosinolate concentrations in the seed from a crop of cv. Cobra severely infected by P. brassicae in 1990‐91, but did not increase yield”
t0“winter oilseed rape”
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