Botryosphaeria-related dieback and control investigated in noncoastal California grapevines
Jean S. VanderGheynst
Authors AffiliationsL. Epstein is Professor of Plant Pathology, Department of Plant Pathology, UC Davis; S. Kaur is Staff Research Associate, Department of Plant Pathology, UC Davis; J.S. Vander-Gheynst is Professor, Biological and Agricultural Engineering, UC Davis.
Hilgardia 62(4):161-166. DOI:10.3733/ca.v062n04p161. October 2008.
Dieback, or “dead arm,” in noncoastal California grapevines is most commonly caused by Botryosphaeria spp. Using Koch's postulates, we demonstrated that isolates of B. obtusa are pathogenic on grapevines. We initiated studies to investigate the life cycle of B. obtusa and ways to control it with cultural practices. Fungal spores disseminated by rainstorms were collected in traps in an Arbuckle vineyard from December 2006 through spring 2007. The data suggests that B. obtusa was rain-disseminated throughout winter and spring, and that pycnidia on deadwood in the vines is a major source of inoculum for new infections. Transmission may also be possible via vegetative propagation, pruning shears and insects. Durable latex paints were investigated for protecting pruning and surgical wounds; a self-priming latex paint was shown to be an effective barrier and was nonphytotoxic.
Aroca A, Garcia-Figueres F, Bracamonte L, et al. Occurrence of fungal pathogens associated with grapevine nurseries and the decline of young vines in Spain. Eur J Plant Pathol. 2006. 115:195-202. doi:10.1007/s10658-006-9008-5 https://doi.org/doi:10.1007/s10658-006-9008-5
Copes WF, Hendrix FF jr. Effect of temperature on sporulation of Botryosphaerie clothidea, B. obtusa, and B. rhodina. Plant Dis. 2004. 88:292-6. doi:10.1094/PDIS.2004.88.3.292 https://doi.org/doi:10.1094/PDIS.2004.88.3.292
Gimenez-Jaime A, Aroca A, Raposo R, et al. Occurrence of fungal pathogens associated with grape-vine nurseries and the decline of young vines in Spain. J Phytopathol. 2006. 154:598-602. doi:10.1111/j.1439-0434.2006.01153.x https://doi.org/doi:10.1111/j.1439-0434.2006.01153.x
Leavitt GM, Munnecke DE. The occurrence, distribution, and control of Botryodiplodia theobromae on grapes in California. Phytopathol. 1987. 77:1690- (abstr.)
Phillips AJL. Botryosphaeria dothidea and other fungi associated with excoriose and dieback of grape-vines in Portugal. Phytopath Z. 1998. 146:327-32. doi:10.1111/j.1439-0434.1998.tb04700.x https://doi.org/doi:10.1111/j.1439-0434.1998.tb04700.x
Phillips AJL. Botryosphaeria species associated with diseases of grapevines in Portugal. Phytopathol Mediterr. 2002. 41:3-18.
Savocchia S, Steel CC, Stodart BJ, Somers A. Pathogenicity of Botryosphaeria species isolated from declining grapevines in subtropical regions of Eastern Australia. Vitis. 2007. 46:27-32.
Urbez-Torres JR, Leavitt GM, Voegel TM, Gubler WD. Identification and distribution of Botryosphaeria spp. associated with grapevine cankers in California. Plant Dis. 2006. 90:1490-503. doi:10.1094/PD-90-1490 https://doi.org/doi:10.1094/PD-90-1490
Van Niekerk JM, Crous PW, Groenewald JZ, et al. DNA phylogeny, morphology and pathogenicity of Botryosphaeria species on grapevines. Mycologia. 2004. 96:781-98. doi:10.2307/3762112 https://doi.org/doi:10.2307/3762112
Van Niekerk JM, Fourie PH, Halleen F, Crous PW. Botryosphaeria spp. as grapevine trunk disease pathogens. Phytopathol Mediterr. 2006. 45:S43-S54.
Also in this issue:Tip Length Models for Major Commercial California Conifers
Wine grapes go green: The Sustainable Viticulture Story
Research fuels sustainable viticulture revolution
Nest boxes can attract wildlife to vineyards
Agro-environmental partnerships facilitate sustainable wine-grape production and assessment
Sidebar: Interest in organic winegrowing is increasing
Innovative outreach increases adoption of sustainable winegrowing practices in Lodi region
Decision support tool seeks to aid stream-flow recovery and enhance water security
Sidebar: Collaborative conservation helps achieve regional water-quantity goals
Leafroll disease is spreading rapidly in a Napa Valley vineyard
Sidebar: Vine surgery tested as management strategy for
Vineyard managers and researchers seek sustainable solutions for mealybugs, a changing pest complex
Sidebar: Pomace management reduces spread of vine mealybugs
Sidebar: Studies needed of vectors spreading leafroll disease in California vineyards
Liquid baits control Argentine ants sustainably in coastal vineyards
Vineyard floor management affects soil, plant nutrition, and grape yield and quality
Self-reseeding annual legumes evaluated as cover crops for untilled vineyards
Soil-landscape model helps predict potassium supply in vineyards
Vineyard nutrient needs vary with rootstocks and soils