Abstract
Crop diversification and crop sequencing can influence plant disease risk in cropping systems. The objective of this research was to determine the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.). Barley and spring wheat were direct‐seeded (no till) in the crop residue of 10 crops {barley, canola ( Brassica napus L.), crambe ( Crambe abyssinica Hochst. ex R.E. Fr.), dry bean ( Phaseolus vulgaris L.), dry pea ( Pisum sativum L.), flax ( Linum usitatissimum L.), safflower ( Carthamus tinctorius L.), soybean [ Glycine max (L.) Merr.], sunflower ( Helianthus annuus L.), and spring wheat}. Barley was evaluated for leaf spot diseases 15 times over 2 yr. Results indicate that risk for leaf spot disease on barley would be lower following wheat, crambe, canola and dry pea compared with the barley‐after‐barley treatment. Although barley yields were similar across all treatments one year, differences were detected in another year with the barley‐after‐barley treatment having the lowest yield. Spring wheat was evaluated for leaf spot diseases 22 times over 2 yr. Differences among treatments were more detectable in earlier evaluations, indicating a greater influence of crop residue and carryover of inoculum early in the season compared with later. The risk for leaf spot disease was lower when wheat was grown after canola, barley, crambe, and flax than when grown after the other crops. Although wheat yields were similar across all treatments one year, differences were detected in another year with the wheat‐after‐wheat treatment having the lowest yield.
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Claims 6
Claim · model-written summary
Leaf spot disease risk on barley was lower following wheat, crambe or canola than after barley.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- wheat, crambe, canolae1
- Outcome
- risk for leaf spot diseasee1
- Direction
- lowere1
- Comparator
- barley‐after‐barley treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e1“Results indicate that risk for leaf spot disease on barley would be lower following wheat, crambe, canola and dry pea compared with the barley‐after‐barley treatment”
Claim · model-written summary
Leaf spot disease risk on barley was lower following dry pea than after barley.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- dry peae1
- Outcome
- risk for leaf spot diseasee1
- Direction
- lowere1
- Comparator
- barley‐after‐barley treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e1“Results indicate that risk for leaf spot disease on barley would be lower following wheat, crambe, canola and dry pea compared with the barley‐after‐barley treatment”
Claim · model-written summary
Barley after barley had the lowest yield in one year, although yields were similar across treatments in the other year.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- barley‐after‐barley treatmente2
- Outcome
- yielde2
- Direction
- loweste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e2“Although barley yields were similar across all treatments one year, differences were detected in another year with the barley‐after‐barley treatment having the lowest yield”
Claim · model-written summary
Spring wheat grown after canola, barley or crambe had lower leaf spot disease risk than after the other crops.
- Taxon
- spring wheat
Triticum aestivume0 - Treatment
- canola, barley, crambee3
- Outcome
- risk for leaf spot diseasee3
- Direction
- lowere3
- Comparator
- the other cropse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e3“The risk for leaf spot disease was lower when wheat was grown after canola, barley, crambe, and flax than when grown after the other crops”
Claim · model-written summary
Spring wheat grown after flax had lower leaf spot disease risk than after the other crops.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- flaxe3
- Outcome
- risk for leaf spot diseasee3
- Direction
- lowere3
- Comparator
- the other cropse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e3“The risk for leaf spot disease was lower when wheat was grown after canola, barley, crambe, and flax than when grown after the other crops”
Claim · model-written summary
Wheat after wheat had the lowest yield in one year, although yields were similar across treatments in the other year.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- wheat‐after‐wheat treatmente4
- Outcome
- yielde4
- Direction
- loweste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of 10 previous crops on leaf spot diseases of barley ( Hordeum vulgare L.) and hard red spring wheat ( Triticum aestivum L.)”
e4“Although wheat yields were similar across all treatments one year, differences were detected in another year with the wheat‐after‐wheat treatment having the lowest yield”
The same questions in other papers
Linum usitatissimum · disease · Triticum aestivum (wheat)Positive and negative results
1 in the opposite direction
- negative
Triticum aestivum · disease · Hordeum vulgare (barley)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
3 papers more in this group
See all 7 papers →Hordeum vulgare · disease · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 10 in the opposite direction
- no effect
- negative
- no effect
11 papers more in this group
See all 15 papers →Brassica napus var. napus · disease · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- 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.