Effect of Foliar Fungicides on Hail-damaged Corn

dc.contributor.author Sisson, Adam
dc.contributor.author Kandel, Yuba
dc.contributor.author Robertson, Alison
dc.contributor.author Asmus, Amy
dc.contributor.author Hart, Chad
dc.contributor.author Wiggs, Stith
dc.contributor.author Mueller, Daren
dc.contributor.department Economics
dc.contributor.department Plant Pathology and Microbiology
dc.date 2018-05-26T22:01:24.000
dc.date.accessioned 2020-06-30T06:23:09Z
dc.date.available 2020-06-30T06:23:09Z
dc.date.copyright Fri Jan 01 00:00:00 UTC 2016
dc.date.issued 2016-01-01
dc.description.abstract <p>To test if fungicide applied to hail-injured corn improves yield and reduces disease, we simulated hail at VT and R2 growth stages for three years at three Iowa locations for a total of five site years. Hail damage was simulated using a string trimmer or an ice-propelling machine and non-hail controls were included. Estimated defoliation ranged from 5 to 51%, along with ear and stalk injury. After hail events, Headline AMP fungicide (pyraclostrobin + metconazole) was applied at an “immediate” or “deferred” timing (averaging 3 and 8 days afterwards, respectively). A non-fungicide treated control was included in hailed and non-hail control plots. Hail injury reduced fungal foliar disease compared to plants without hail injury, although overall disease severity was low during this study. Hail events at VT or R2 decreased yield compared to control plots (P = 0.1). Fungicide application did not provide yield-increasing plant health benefits after VT and R2 hail, at either “immediate” or “deferred” timing. While yield differences were not statistically significant, a cost/benefit analysis showed deferred fungicide application after VT hail, and immediate and deferred applications after VT for non-hail plots did provide positive economic returns. Results will help inform decisions about fungicide use in hail-damaged corn when foliar diseases are not present at high levels.</p>
dc.description.comments <p>This article is published as Sisson, A. J., Kandel, Y. R., Robertson, A. E., Hart, C. E., Asmus, A., Wiggs, S. N., and Mueller, D. S. 2016. Effect of foliar fungicides on hail-damaged corn. Plant Health Prog. 17:6-12. doi: <a href="http://dx.doi.org/10.1094/PHP-RS-15-0046" target="_blank">10.1094/PHP-RS-15-0046</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/plantpath_pubs/241/
dc.identifier.articleid 1236
dc.identifier.contextkey 12190564
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath plantpath_pubs/241
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/57692
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/plantpath_pubs/241/0-Permission_from_The_American_Phytopathological_Society.pdf|||Fri Jan 14 22:52:46 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/plantpath_pubs/241/2016_Robertson_EffectFoliar.pdf|||Fri Jan 14 22:52:47 UTC 2022
dc.source.uri 10.1094/PHP-RS-15-0046
dc.subject.disciplines Agricultural Economics
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Plant Pathology
dc.title Effect of Foliar Fungicides on Hail-damaged Corn
dc.type article
dc.type.genre article
dspace.entity.type Publication
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