Abstract
The reaction of spring barley to common root rot and its effect on yield components and disease severity was studied under varied moisture regimes. Infection of barley from natural soil inoculum, primarily of Cochliobolus sativus. was augmented with inoculum of C. sativus or Fusarium culmorum to insure uniform disease pressure during plant development. To study the effect of varied soil moisture, three locations were utilized that differed in annual precipitation in 1986, and a line-source sprinkler irrigation system was utilized to establish a soil moisture gradient from a high moisture regime that received both irrigation water and rainfall to a dryland regime that received only rainfall in 1986 and 1987. Plant emergence and harvestable tillers were reduced by inoculation with C. sativus as compared to non-inoculated controls. Grain yield loss was associated with C. sativus when the dryland regime received no rainfall during seedling development and in the low rainfall, drought location. No grain yield losses occurred in the irrigated moisture regimes or the moderate and high rainfall locations with inoculation by either pathogen. In the irrigated moisture regimes, the moderate rainfall location, and the high rainfall location, the inoculated plants compensated for reduced plant emergence and harvestable tillers by producing heavier kernels. Disease severity, based on the subcrown internode lesion development during soft dough growth stage, did not differ in the dryland and irrigated moisture
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Claims 4
Claim · model-written summary
C. sativus inoculation reduced barley emergence and harvestable tillers.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- inoculation with C. sativuse0
- Interactor
- C. sativus
Bipolaris sorokinianae0pathogen - Outcome
- Plant emergence and harvestable tillerse0
- Direction
- reducede0
- Comparator
- non-inoculated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Plant emergence and harvestable tillers were reduced by inoculation with C. sativus as compared to non-inoculated controls”
t0“barley”
Claim · model-written summary
C. sativus was associated with grain yield loss under seedling drought and at the low rainfall location.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- C. sativusBipolaris sorokinianae0pathogen
- Outcome
- Grain yield losse0
- Direction
- losse0
- Qualifier
- dryland regime received no rainfall during seedling developmente0
- Setting
- low rainfall, drought locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield loss was associated with C. sativus when the dryland regime received no rainfall during seedling development and in the low rainfall, drought location”
t0“barley”
Claim · model-written summary
Neither pathogen caused grain yield losses under irrigated or moderate and high rainfall conditions.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- inoculation by either pathogene0
- Interactor
- C. sativusBipolaris sorokinianae1pathogen
- Second interactor
- Fusarium culmorum
.jpg?width=60)
Fusarium culmorume1pathogen - Outcome
- grain yield lossese0
- Direction
- Noe0
- Setting
- irrigated moisture regimes or the moderate and high rainfall locationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“No grain yield losses occurred in the irrigated moisture regimes or the moderate and high rainfall locations with inoculation by either pathogen”
e1“C. sativus or Fusarium culmorum”
t0“barley”
Claim · model-written summary
Inoculated plants compensated for reduced emergence and tillers by producing heavier kernels under wetter conditions.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- heavier kernelse0
- Direction
- heaviere0
- Setting
- irrigated moisture regimes, the moderate rainfall location, and the high rainfall locatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inoculated plants compensated for reduced plant emergence and harvestable tillers by producing heavier kernels”
e1“In the irrigated moisture regimes, the moderate rainfall location, and the high rainfall location”
t0“barley”
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