Importance of Fungicide Seed Treatment and Environment on Seedling Diseases of Cotton

Rothrock, C. S.; Winters, S.; Miller, Phyllis; Gbur, E. E.; Verhalen, Laval M.; Greenhagen, B. E.; Isakeit, Thomas; Batson, W. E.; Bourland, F. M.; Colyer, P. D.; Wheeler, Terry A.; Kaufman, Harold W.; Sciumbato, G. L.; Thaxton, P. M.; Lawrence, Kathy; Gazaway, William S.; Chambers, Adam; Newman, M. A.; Kirkpatrick, T. L.; Barham, J. D.; Phipps, P. M.; Shokes, F. M.; Littlefield, Larry J.; Padgett, G. B.; Hutmacher, Robert B.; Davis, R. M.; Kemerait, Robert C.; Sumner, D. R.; Seebold, Kenneth W.; Mueller, John; Garber, R. H.

doi:10.1094/pdis-01-12-0031-sr

Cited by 26 publications

(29 citation statements)

References 27 publications

(37 reference statements)

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“…Limited research has examined the importance of soil pathogen populations on disease development. Multi-year data from Rothrock et al (65) show a small but significant negative correlation between soil populations of Pythium spp. and stand, but not the other pathogens examined.…”

Section: Causal Agentsmentioning

confidence: 98%

“…The use of the Pythium selective fungicide seed treatment, metalaxyl, has demonstrated the importance of Pythium spp. in stand establishment, providing an increase in stand in 40 of 119 trials that had a stand response to a fungicide treatment (65).…”

Section: Causal Agentsmentioning

confidence: 99%

“…Poor stands are often associated with early planting (48,25). Rothrock et al (65) found that cotton stands decreased in trials where the average minimum soil temperature the first 3 d after planting decreased from 75 to 54°F and rainfall increased. Seedling diseases accounted for most of these stand reductions as evidenced by the difference in percent stand between seed having a broad-spectrum fungicide treatment and seed not receiving a fungicide treatment.…”

Section: Epidemiologymentioning

confidence: 99%

“…Stand losses from Pythium spp. increase as soil temperature decreases and soil moisture increases (5,48,65). Black root rot also is more severe under planting temperatures less than 75°F and increased soil water (15, 64, 2), while stand losses from R. solani occur over a wide range of temperatures and soil water (78,5,43,41,65).…”

Section: Epidemiologymentioning

confidence: 99%

“…increase as soil temperature decreases and soil moisture increases (5,48,65). Black root rot also is more severe under planting temperatures less than 75°F and increased soil water (15, 64, 2), while stand losses from R. solani occur over a wide range of temperatures and soil water (78,5,43,41,65). Differ-ences in soil texture may affect seedling disease severity, with soils high in clay content being more favorable for disease than sandier soils (49,40).…”

Section: Epidemiologymentioning

confidence: 99%

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Cotton diseases: Seed and seedling, bacterial blight, and vascular wilt

Rothrock

Woodward²,

Kemerait

2015

Crops & Soils

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This article, adapted from the new book, Cotton, 2nd edition, discusses three types of cotton diseases: seed and seedling, bacterial blight, and vascular wilt. For more information on this topic as well as a comprehensive presentation of many other aspects of cotton from biology to production to marketing, check out the book at https://dl.sciencesocieties.org/publications/books. Earn 1.5 CEUs in Integrated Pest Management by reading this article and completing the quiz at http://www.certifiedcropadviser.org/certifications/self-study/723.

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Section: Causal Agentsmentioning

confidence: 98%

Section: Causal Agentsmentioning

confidence: 99%

Section: Epidemiologymentioning

confidence: 99%

Section: Epidemiologymentioning

confidence: 99%

Section: Epidemiologymentioning

confidence: 99%

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Cotton diseases: Seed and seedling, bacterial blight, and vascular wilt

Rothrock

Woodward²,

Kemerait

2015

Crops & Soils

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Importance of temperature in evaluating cotton for resistance to Fusarium wilt caused byFusarium oxysporumf. sp.vasinfectumrace 4

Zhang

Abdelraheem

Wheeler³

et al. 2021

Crop Science

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Fusarium wilt of cotton (Gossypium spp.) is caused by a soil‐ and seed‐borne fungal pathogen Fusarium oxysporum f. sp. vasinfectum (FOV). Fusarium oxysporum f. sp. vasinfectum race 4 (FOV4) is a significant threat to cotton production in the United States. The effect of temperature and soil on disease symptoms in cultivars with a range of susceptibility to FOV4 was examined in growth chamber trials. Three upland (G. hirsutum L.) and three pima (G. barbadense L.) cultivars were planted in three types of soils (potting mix and farm soils with and without FOV4 preinfestation) and maintained at four constant temperature regimes (20, 23, 26, and 29 °C). After seedling emergence, each pot was inoculated with conidial suspensions of FOV4 and scored for resistance based on disease incidence (DI), foliar disease severity rating (DSR), and mortality rate (MR) at 7, 14, 21, and 28 d post‐inoculation (dpi). The area under the disease progress curve (AUDPC) based on DSR across the four evaluation dpi was also analyzed. Among the six cultivars tested, Pima PHY 841 RF, Pima S‐6, and the uplands Acala 1517‐08 and FM 2334GLT were the most resistant, whereas upland PHY 725 RF and Pima S‐7 were the most susceptible. The genotypic responses to FOV4 were not significantly (P > .05) affected by differences in temperature regime or soil type. Cotton seedlings manifested more severe symptoms and higher mortality when maintained at 23 °C, followed by 20/26 °C and 29 °C in descending order. The mycelial growth rate was greater at 23/26 °C, whereas plants grew slower at 20/23 °C. There were no differences (P > .05) in DI, DSR, MR, and AUDPC between the inoculated farm soil (with no FOV4 preinfestation) and the inoculated FOV4‐preinfested farm soil, suggesting the unnecessity of using the latter in artificial inoculations. However, the potting soil produced higher (P < .05) DI and DSR at 7 and 14 dpi but lower (P < .05) AUDPC. This growth chamber study demonstrated that 23 °C produced the highest DI, severity, and plant death, providing an important piece of information for screening cotton for FOV4 resistance in breeding and FOV4 disease management in cotton production.

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TEF1 sequence-based diversity of Fusarium species recovered from collar rot diseased cotton seedlings in New South Wales, Australia

Thao

Gregson

et al. 2020

Australasian Plant Pathol.

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Importance of Fungicide Seed Treatment and Environment on Seedling Diseases of Cotton

Abstract: Rothrock, C. S., Winters, S. A., Miller, P K., Gbur, E., Verhalen, L. M.,

Cited by 26 publications

References 27 publications

Cotton diseases: Seed and seedling, bacterial blight, and vascular wilt

Cotton diseases: Seed and seedling, bacterial blight, and vascular wilt

Importance of temperature in evaluating cotton for resistance to Fusarium wilt caused byFusarium oxysporumf. sp.vasinfectumrace 4

TEF1 sequence-based diversity of Fusarium species recovered from collar rot diseased cotton seedlings in New South Wales, Australia

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