Plant Disease (2010) 94, 867-872

F.P. Trouillas and W.D. Gubler (2010)
Pathogenicity of Diatrypaceae species in grapevines in California
Plant Disease 94 (7), 867-872
Abstract: Diatrypaceous fungi have been isolated from cankered wood of grapevines (Vitis vinifera) in California. However, the pathogenicity of these fungi and their potential to cause diseases in grapevine was unknown. A series of pathogenicity tests were conducted to determine if these fungi were grapevine pathogens. In all experiments, species of the family Diatrypaceae were re-isolated from the margins of developing lesions, although frequency of re-isolation and average length of vascular discolorations varied among isolates. Cryptovalsa ampelina, Diatrype stigma, and Eutypa leptoplaca were capable of colonizing dormant canes and causing vascular necrosis. Cryptosphaeria pullmanensis, C. ampelina, D. stigma, Diatrype whitmanensis, and E. leptoplaca infected and caused lesions in green shoots of the new vegetative growth. Diatrype oregonensis and Diatrypella verrucaeformis isolates did not produce lesions that were significantly different from those produced in the control shoots and canes. This suggests that D. oregonensis and D. verrucaeformis fungi may be saprophytic rather than pathogenic to grapevine.
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Full text of article
Database assignments for author(s): Walter D. Gubler

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cryptovalsa ampelina	Grapevine (Vitis)	U.S.A. (SW)
	Eutypa leptoplaca	Grapevine (Vitis)	U.S.A. (SW)
	Cryptosphaeria pullmanensis	Grapevine (Vitis)	U.S.A. (SW)
	Diatrype stigma	Grapevine (Vitis)	U.S.A. (SW)
	Diatrype whitmanensis	Grapevine (Vitis)	U.S.A. (SW)