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Alternaria helianthi (leaf blight of sunflower )
Alternaria helianthi
leaf blight of sunflower
Alternariaster helianthi,Helminthosporium helianthi
Worldwide
Widespread
2021-03-25 19:12:15
fungus
Korea
sunflower
ALTEHE
Korea lists this pathogen as Alternaria spp. This pathogen has been reported in Korea (Farr and Rossman, 2020)
1 Known Hosts
Helianthus annuus
sunflower
No
ALTEHE-3,ALTEHE-4,ALTEHE-5,ALTEHE-6
Pathway not proven. Although references indicating seed may be a pathway (Jeffrey, et.al., 1985; Sackston, 1981; Shane, et.al., 1981), there is no evidence of seed transmission from natural sources in the field. Seed to seedling transmission has been demonstrated in the laboratory (Jeffrey, et.al., 1985; Raut, 1985; Shane, et.al., 1981). Seed inoculum may affect seed quality.
Yes
Culture plating
ALTEHE-4,ALTEHE-1
Seed treatments.
Captan, chlorothalonil, iprodione, mancozeb or triadimenol all improved seedling stands in laboratory trials.
ALTEHE-4
ALTEHE-3
Sackston, WE. 1981. The Sunflower Crop and Disease: Progress, Problems and Prospects. Plant Disease 65: 643-648
ALTEHE-4
Jeffrey KK, Lipps PE and Herr LJ, 1984. Effects of isolate virulence, plant age, and crop residues on seedling blight of sunflower caused by Alternaria helianthi. Phytopathology, 74:1107-1110
ALTEHE-5
Raut JG. 1985. Location of Alternaria helianthi in sunflower seed and its transmission from seed to plant. Indian Phytopathology, 38:522
ALTEHE-6
Shane WW, Baumer JS and Sederstrom SG. 1981. Alternaria helianthi: Apathogen of sunflower new to Minnesota. Plant Disease 65:269-271
ALTEHE-1
Alternaria helianthi. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
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