Abstract
Integrated Fusarium head blight (FHB) management programs consisting of different combinations of cultivar resistance class and an application of the fungicide prothioconazole + tebuconazole at or after 50% early anthesis were evaluated for efficacy against FHB incidence (INC; percentage of diseased spikes), index (IND; percentage of diseased spikelets per spike), Fusarium damaged kernel (FDK), deoxynivalenol (DON) toxin contamination, grain yield, and test weight (TW) in inoculated field trials conducted in 11 U.S. states in 2014 and 2015. Mean log response ratios and corresponding percent control values for INC, IND, FDK, and DON, and mean differences in yield and TW relative to a nontreated, inoculated susceptible check (S_CK), were estimated through network meta-analyses as measures of efficacy. Results from the analyses were then used to estimate the economic benefit of each management program for a range of grain prices and fungicide applications costs. Management programs consisting of a moderately resistant (MR) cultivar treated with the fungicide were the most efficacious, reducing INC by 60 to 69%, IND by 71 to 76%, FDK by 66 to 72%, and DON by 60 to 64% relative to S_CK, compared with 56 to 62% for INC, 68 to 72% for IND, 66 to 68% for FDK, and 58 to 61% for DON for programs with a moderately susceptible (MS) cultivar. The least efficacious programs were those with a fungicide application to a susceptible (S) cultivar, with less than a 45% reduction of INC, IND, FDK, or DON. All programs were more efficacious under conditions favorable for FHB compared with less favorable conditions, with applications made at 50% early anthesis being of comparable efficacy to those made 2 to 7 days later. Programs with an MS cultivar resulted in the highest mean yield increases relative to S_CK (541 to 753 kg/ha), followed by programs with an S cultivar (386 to 498 kg/ha) and programs with an MR cultivar (250 to 337 kg/ha). Integrated management programs with an MS or MR cultivar treated with the fungicide at or after 50% early anthesis were the most likely to result in a 50 or 75% control of IND, FDK, or DON in a future trial. At a fixed fungicide application cost, these programs were $4 to $319/MT more economically beneficial than corresponding fungicide-only programs, depending on the cultivar and grain price. These findings demonstrate the benefits of combining genetic resistance with a prothioconazole + tebuconazole treatment to manage FHB, even if that treatment is applied a few days after 50% early anthesis.
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Claims 14
Claim · model-written summary
MR cultivar plus fungicide reduced incidence by 60 to 69%.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- moderately resistant (MR) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- INCe0
- Direction
- reducinge0
- Value
- 60 to 69%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing INC by 60 to 69%”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately resistant (MR) cultivar treated”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
MR cultivar plus fungicide reduced index by 71 to 76%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately resistant (MR) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- INDe0
- Direction
- decreaseinferrede0
- Value
- 71 to 76%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IND by 71 to 76%”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately resistant (MR) cultivar treated”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
MR cultivar plus fungicide reduced damaged kernels by 66 to 72%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately resistant (MR) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- FDKe0
- Direction
- decreaseinferrede0
- Value
- 66 to 72%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FDK by 66 to 72%”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately resistant (MR) cultivar treated”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
MR cultivar plus fungicide reduced DON by 60 to 64%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately resistant (MR) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- DONe0
- Direction
- decreaseinferrede0
- Value
- 60 to 64%e0
- Comparator
- S_CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DON by 60 to 64% relative to S_CK”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately resistant (MR) cultivar treated”
Claim · model-written summary
MS programs reduced incidence by 56 to 62%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately susceptible (MS) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- INCe0
- Direction
- decreaseinferrede0
- Value
- 56 to 62%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“56 to 62% for INC”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately susceptible (MS) cultivar”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
MS programs reduced index by 68 to 72%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately susceptible (MS) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- INDe0
- Direction
- decreaseinferrede0
- Value
- 68 to 72%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“68 to 72% for IND”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately susceptible (MS) cultivar”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
MS programs reduced damaged kernels by 66 to 68%.
- Taxon
- WheatTriticum aestivumt0
- Material
- moderately susceptible (MS) cultivare3
- Treatment
- prothioconazole + tebuconazolee2
- Outcome
- FDKe0
- Direction
- decreaseinferrede0
- Value
- 66 to 68%e0
- Comparator
- S_CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“66 to 68% for FDK”
t0“Wheat”
e2“application of the fungicide prothioconazole + tebuconazole”
e3“moderately susceptible (MS) cultivar”
e4“nontreated, inoculated susceptible check (S_CK)”
Claim · model-written summary
Programs were more effective under FHB-favorable conditions.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- efficaciouse0
- Direction
- moree0
- Comparator
- less favorable conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All programs were more efficacious under conditions favorable for FHB compared with less favorable conditions”
t0“Wheat”
Claim · model-written summary
Application at anthesis was comparably effective to two to seven days later.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- 50% early anthesise0
- Outcome
- efficacye0
- Direction
- comparablee0
- Comparator
- 2 to 7 days latere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applications made at 50% early anthesis being of comparable efficacy to those made 2 to 7 days later”
t0“Wheat”
Claim · model-written summary
MS programs increased yield 541 to 753 kg/ha.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- MS cultivare0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 541 to 753 kg/hae0
- Comparator
- S_CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MS cultivar resulted in the highest mean yield increases relative to S_CK (541 to 753 kg/ha)”
t0“Wheat”
Claim · model-written summary
S programs increased yield 386 to 498 kg/ha.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- S cultivare0
- Outcome
- yielde3
- Direction
- increasee4
- Value
- 386 to 498 kg/hae0
- Comparator
- S_CKe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S cultivar (386 to 498 kg/ha)”
t0“Wheat”
e2“relative to a nontreated, inoculated susceptible check (S_CK)”
e3“mean yield increases relative to S_CK”
e4“highest mean yield increases”
Claim · model-written summary
MR programs increased yield 250 to 337 kg/ha.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- MR cultivare0
- Outcome
- yielde3
- Direction
- increasee4
- Value
- 250 to 337 kg/hae0
- Comparator
- S_CKe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MR cultivar (250 to 337 kg/ha)”
t0“Wheat”
e2“relative to a nontreated, inoculated susceptible check (S_CK)”
e3“mean yield increases relative to S_CK”
e4“highest mean yield increases”
Claim · model-written summary
MS or MR treated programs were most likely to reach 50 or 75% control in future trials.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- fungicidee0
- Outcome
- control of IND, FDK, or DONe0
- Value
- 50 or 75%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Integrated management programs with an MS or MR cultivar treated with the fungicide at or after 50% early anthesis were the most likely to result in a 50 or 75% control of IND, FDK, or DON in a future trial”
t0“Wheat”
Claim · model-written summary
Integrated programs had $4 to $319/MT greater economic benefit than fungicide-only programs.
Verbatim
e0“These programs were $4 to $319/MT more economically beneficial than corresponding fungicide-only programs”
The same questions in other papers
prothioconazole · disease · Triticum aestivum (wheat)Positive and negative results
15 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- no effect
13 papers more in this group
See all 17 papers →tebuconazole · disease · Triticum aestivum (wheat)Results agree
35 papers in the same direction as this paper
- positive
- positive
- positive
32 papers more in this group
See all 36 papers →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.