Abstract
Rhizoctonia spp. cause substantial yield losses in direct-seeded cereal crops compared with conventional tillage. To investigate the mechanisms behind this increased disease, soils from tilled or direct-seeded fields were inoculated with Rhizoctonia spp. at population densities from 0.8 to 250 propagules per gram and planted with barley (Hordeum vulgare). The incidence and severity of disease did not differ between soils with different tillage histories. Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off. High inoculum densities of both species stimulated early production of crown roots in barley seedlings. Intact soil cores from these same tilled and direct-seeded fields were used to evaluate the growth of Rhizoctonia spp. from colonized oat seeds. Growth of R. oryzae was not affected by previous tillage history. However, R. solani AG-8 grew more rapidly through soil from a long-term direct-seeded field compared to tilled soils. The differential response between these two experiments (mixed, homogenized soil versus intact soil) suggests that soil structure plays a major role in the proliferation of R. solani AG-8 through soils with different tillage histories.
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Claims 9
Claim · model-written summary
Disease incidence and severity in barley did not differ between soils with different tillage histories.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree2 - Treatment
- soils with different tillage historiese0
- Outcome
- incidence and severity of diseasee0
- Direction
- did not differe0
- Comparator
- different tillage historiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The incidence and severity of disease did not differ between soils with different tillage histories.”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
High inoculum densities of R. solani AG-8 stunted barley plants.
- Taxon
- barleyHordeum vulgaree2
- Treatment
- high inoculum densitiese0
- Interactor
- R. solani AG-8
Rhizoctonia solanie0pathogen - Outcome
- stunted plantse0
- Direction
- stuntede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
High inoculum densities of R. oryzae stunted barley plants.
- Taxon
- barleyHordeum vulgaree2
- Treatment
- high inoculum densitiese0
- Interactor
- R. oryzaeWaitea circinatae0pathogen
- Outcome
- stunted plantse0
- Direction
- stuntede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
R. oryzae caused pre-emergence damping-off in barley.
- Taxon
- barleyHordeum vulgaree2
- Interactor
- R. oryzaeWaitea circinatae1pathogen
- Outcome
- pre-emergence damping-offe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the latter causing pre-emergence damping-off”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
High inoculum densities of R. solani AG-8 stimulated early crown-root production in barley seedlings.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- barley seedlingse0
- Treatment
- High inoculum densitiese0
- Interactor
- R. solani AG-8Rhizoctonia solanie1pathogen
- Outcome
- early production of crown rootse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
High inoculum densities of R. oryzae stimulated early crown-root production in barley seedlings.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- barley seedlingse0
- Treatment
- High inoculum densitiese0
- Interactor
- R. oryzaeWaitea circinatae1pathogen
- Outcome
- early production of crown rootse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
R. oryzae growth was unaffected by prior tillage history.
- Taxon
- barleyHordeum vulgaree2
- Treatment
- previous tillage historye0
- Interactor
- R. oryzaeWaitea circinatae0pathogen
- Outcome
- Growth of R. oryzaee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of R. oryzae was not affected by previous tillage history.”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
R. solani AG-8 grew faster through soil from a long-term direct-seeded field than tilled soils.
- Taxon
- barleyHordeum vulgaree2
- Treatment
- soil from a long-term direct-seeded fielde0
- Interactor
- R. solani AG-8Rhizoctonia solanie0pathogen
- Outcome
- R. solani AG-8 grewe0
- Direction
- more rapidlye0
- Comparator
- tilled soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“R. solani AG-8 grew more rapidly through soil from a long-term direct-seeded field compared to tilled soils.”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
Claim · model-written summary
Soil structure was suggested to play a major role in R. solani AG-8 proliferation across tillage histories.
- Taxon
- barleyHordeum vulgaree2
- Interactor
- R. solani AG-8Rhizoctonia solanie0pathogen
- Outcome
- proliferation of R. solani AG-8e0
- Qualifier
- soil structuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil structure plays a major role in the proliferation of R. solani AG-8 through soils with different tillage histories”
t0“Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot”
e1“Both R. solani AG-8 and R. oryzae stunted plants at high inoculum densities, with the latter causing pre-emergence damping-off.”
e2“High inoculum densities of both species stimulated early production of crown roots in barley seedlings.”
The same questions in other papers
inoculation · Rhizoctonia solani · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- positive
tillage · disease · Hordeum vulgare (barley)Positive and negative results
7 papers in the same direction as this paper · 6 reporting no difference from an alternative
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →transplanting · Rhizoctonia solani · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- negative
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.