Abstract
SUMMARY The results of observations begun in 1973 and of disease surveys carried out on winter oil-seed rape crops on ten farms in Hertfordshire and Bedfordshire between 1975 and 1978 are reported. The major diseases encountered in the surveys, namely downy mildew ( Peronospora parasitica (FT.) Tull.), canker ( Leptosphaeria maculans (Desm.) Ces. & de Not.), light leafspot or scorch ( Pyrenopeziza brassicae Sutton & Rawlinson) and grey mould ( Botrytis cinerea Fr.) are discussed in relation to diseases of rape grown elsewhere and the results of experiments on disease control reported. Symptoms of virus infection and root disease were rare. Early (before stem extension) use of two applications of benomyl (1·2 kg a.i./ha) decreased the incidence and severity of light leaf spot and canker and increased yield by up to 33%. Benomyl plus thiram seed treatment (5 and l·5ga.i./kg) was less effective than a benomyl foliar spray. In field experiments differences in severity of light leaf spot and canker explained a substantial part of variation in yield but downy mildew did notaccount for further variation.
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Claims 11
Claim · model-written summary
Downy mildew was a major disease in the surveyed rape crops.
- Taxon
- winter oil-seed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Interactor
- Peronospora parasitica
Hyaloperonospora parasiticae0pathogen - Outcome
- downy mildewe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“winter oil-seed rape”
e0“The major diseases encountered in the surveys, namely downy mildew ( Peronospora parasitica (FT.) Tull.)”
Claim · model-written summary
Canker was a major disease in the surveyed rape crops.
- Taxon
- winter oil-seed rapeBrassica napust0
- Interactor
- Leptosphaeria maculans
Plenodomus lingame0pathogen - Outcome
- cankere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“canker ( Leptosphaeria maculans (Desm.) Ces. & de Not.)”
Claim · model-written summary
Light leafspot was a major disease in the surveyed rape crops.
- Taxon
- winter oil-seed rapeBrassica napust0
- Interactor
- Pyrenopeziza brassicaePyrenopeziza brassicaee0pathogen
- Outcome
- light leafspote0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“light leafspot or scorch ( Pyrenopeziza brassicae Sutton & Rawlinson)”
Claim · model-written summary
Grey mould was a major disease in the surveyed rape crops.
- Taxon
- winter oil-seed rapeBrassica napust0
- Interactor
- Botrytis cinerea
Botrytis cinereae0pathogen - Outcome
- grey moulde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“grey mould ( Botrytis cinerea Fr.)”
Claim · model-written summary
Virus infection symptoms and root disease were rare.
- Taxon
- winter oil-seed rapeBrassica napust0
- Outcome
- Symptoms of virus infection and root diseasee0
- Direction
- raree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“Symptoms of virus infection and root disease were rare.”
Claim · model-written summary
Early benomyl applications decreased light leaf spot incidence and severity.
- Taxon
- winter oil-seed rapeBrassica napust0
- Treatment
- two applications of benomyl (1·2 kg a.i./ha)e0
- Outcome
- incidence and severity of light leaf spote0
- Direction
- decreasede0
- Qualifier
- before stem extensione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“Early (before stem extension) use of two applications of benomyl (1·2 kg a.i./ha) decreased the incidence and severity of light leaf spot and canker”
Claim · model-written summary
Early benomyl applications decreased canker incidence and severity.
- Taxon
- winter oil-seed rapeBrassica napust0
- Treatment
- two applications of benomyl (1·2 kg a.i./ha)e0
- Outcome
- cankere0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“Early (before stem extension) use of two applications of benomyl (1·2 kg a.i./ha) decreased the incidence and severity of light leaf spot and canker”
Claim · model-written summary
Early benomyl applications increased yield by up to 33%.
- Taxon
- winter oil-seed rapeBrassica napust0
- Treatment
- two applications of benomyl (1·2 kg a.i./ha)e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- up to 33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“Early (before stem extension) use of two applications of benomyl (1·2 kg a.i./ha) decreased the incidence and severity of light leaf spot and canker and increased yield by up to 33%.”
Claim · model-written summary
Benomyl plus thiram seed treatment was less effective than benomyl foliar spray.
- Taxon
- winter oil-seed rapeBrassica napust0
- Treatment
- Benomyl plus thiram seed treatment (5 and l·5ga.i./kg)e0
- Outcome
- less effectivee0
- Direction
- less effectivee0
- Comparator
- benomyl foliar spraye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“Benomyl plus thiram seed treatment (5 and l·5ga.i./kg) was less effective than a benomyl foliar spray.”
Claim · model-written summary
Light leaf spot and canker severity differences explained substantial yield variation.
- Taxon
- winter oil-seed rapeBrassica napust0
- Interactor
- light leaf spot and cankere0pathogen
- Outcome
- variation in yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“differences in severity of light leaf spot and canker explained a substantial part of variation in yield”
Claim · model-written summary
Downy mildew did not account for further yield variation.
- Taxon
- winter oil-seed rapeBrassica napust0
- Interactor
- downy mildewPeronosporaceaee0pathogen
- Outcome
- further variatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape”
e0“downy mildew did notaccount for further variation.”
The same questions in other papers
benomyl · disease · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- 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.