Abstract
Michigan ranks first in the nation in cucumber production for processing (pickling), contributing over $45 million to the state's economy in 2019. Cucurbit downy mildew, caused by the oomycete Pseudoperonospora cubensis, is the most important disease of cucumber and an annual threat to yields. Fungicides are the most important means to control P. cubensis. Our goal was to monitor currently labelled conventional fungicides and biopesticides for efficacy over the course of an entire cropping period under high pathogen pressure. Field trials were conducted at the Michigan State University Plant Pathology Research Farm in 2021 and 2022. Fungicides were applied weekly, and disease severity was evaluated by visually assessing the percentage of foliar area showing downy mildew symptoms. At the end of the season, the relative area under the disease progress curve (rAUDPC) was calculated using the disease severity data. Based on rAUDPC results, oxathiapiprolin premixed with chlorothalonil was the most effective fungicide at controlling P. cubensis and was significantly better than all other conventional fungicides in both years tested. In both years, all conventional treatments had a significantly lower rAUDPC than the untreated control except pyraclostrobin, dimethomorph, and fluopicolide. No biopesticide fungicide reduced the rAUDPC compared with the untreated control in either year evaluated.
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Claims 3
Claim · model-written summary
Oxathiapiprolin premixed with chlorothalonil was the most effective fungicide against P. cubensis and significantly better than all other conventional fungicides in both years.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- oxathiapiprolin premixed with chlorothalonile1
- Interactor
- P. cubensis
Pseudoperonospora cubensise1pathogen - Outcome
- controlling P. cubensise1
- Direction
- most effectivee1
- Comparator
- all other conventional fungicidese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Conventional and Biopesticide Fungicides for Cucurbit Downy Mildew Control on Cucumber in Michigan”
e1“Based on rAUDPC results, oxathiapiprolin premixed with chlorothalonil was the most effective fungicide at controlling P. cubensis and was significantly better than all other conventional fungicides in both years tested”
Claim · model-written summary
In both years, all conventional treatments had a significantly lower rAUDPC than the untreated control, except pyraclostrobin, dimethomorph and fluopicolide.
- Taxon
- CucumberCucumis sativust0
- Treatment
- conventional treatmentse2
- Outcome
- rAUDPCe2
- Direction
- lowere2
- Qualifier
- except pyraclostrobin, dimethomorph, and fluopicolidee2
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Conventional and Biopesticide Fungicides for Cucurbit Downy Mildew Control on Cucumber in Michigan”
e2“In both years, all conventional treatments had a significantly lower rAUDPC than the untreated control except pyraclostrobin, dimethomorph, and fluopicolide”
Claim · model-written summary
No biopesticide fungicide reduced the rAUDPC compared with the untreated control in either year.
- Taxon
- CucumberCucumis sativust0
- Treatment
- biopesticide fungicidee3
- Outcome
- rAUDPCe3
- Direction
- reducede3
- Qualifier
- in either year evaluatede3
- Comparator
- untreated controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Conventional and Biopesticide Fungicides for Cucurbit Downy Mildew Control on Cucumber in Michigan”
e3“No biopesticide fungicide reduced the rAUDPC compared with the untreated control in either year evaluated”
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See all 17 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.