Full TGIF Record # 324921
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143240
    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Hutchens, Wendell J.; Booth, Jordan; Goatley, James M.; Henderson, Caleb A.; Kerns, James P.; Nita, Mizuho; Roberson, Travis; McCall, David S.
Author Affiliation:Hutchens: Presenting Author and Virginia Tech; Booth, Goatley, Henderson, Nita, Roberson and McCall: Virginia Tech; Kerns: North Carolina State University
Title:Best management practices for spring dead spot of bermudagrass
Section:Turf pest management oral III
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C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 143240.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Spring dead spot (SDS) (Ophiosphaerella spp.) is among the most challenging diseases to manage in warm-season turfgrasses. Cultural and chemical management strategies for this disease historically have been inconsistent. Three studies were conducted on hybrid bermudagrass (Cynodon dactylon x transvaalensis) fairways from 2019-2022 to determine 1) the most efficacious fungicides against SDS, 2) the influence of post-application irrigation and soil surfactants on fungicide efficacy against SDS, and 3) the optimal application timing based on soil temperature and season for fungicide suppression of SDS. In Study 1, a total of 13 fungicides were applied in the fall to hybrid bermudagrass with a history SDS outbreaks. In Study 2, tebuconazole was applied to hybrid bermudagrass once or twice in the fall with or without a soil surfactant and with or without 0.6 cm of post-application irrigation. In Study 3, isofetamid and tebuconazole were applied at 11 different soil temperatures x times of year to hybrid bermudagrass areas with a history of SDS. For all three studies, plots were assessed at least three times for patch number and percent SDS the following spring. Data were converted to area under the disease progress curve (AUDPC) for each study, AUDPCs were subjected to analysis of variance, and means were compared using a Students t-test (P = 0.1). For Study 1, the most effective fungicides against SDS were isofetamid, mefentrifluconazole, penthiopyrad, and pydiflumetofen. The succinate dehydrogenase inhibiting fungicide group was the most efficacious fungicide group. For Study 2, post-application irrigation allowed for greater suppression of SDS in certain scenarios than no post-application irrigation. Lastly, for Study 3, the optimal application timing for fungicides to suppress SDS was in the fall months when soil temperatures were near 12.8Ā°C."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hutchens, W. J., J. Booth, J. M. Goatley, C. A. Henderson, J. P. Kerns, M. Nita, et al. 2022. Best management practices for spring dead spot of bermudagrass. Agron. Abr. p. 143240.
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    Last checked: 01/24/2023
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