Sidebar: Studies needed of vectors spreading leafroll disease in California vineyards

Leafroll disease is spreading rapidly in a Napa Valley vineyard

Economic impact of grapevine leafroll disease on Vitis vinifera cv. Cabernet franc in Finger Lakes Vineyards of New York

Background. Grapevine leafroll disease is one of the most widespread viral diseases in vineyards, affecting nearly all grape and wine regions in the world. Infection causes yield losses, ripening delays, and alters fruit chemistry, including lowering soluble solids and increasing titratable acidity. The viruses associated with leafroll disease are transmitted through propagation of infected mat...

Genetic variability of natural populations of Grapevine leafroll-associated virus 2 in Pacific Northwest vineyards.

Genetic variability of field populations of Grapevine leafroll-associated virus 2 (GLRaV-2) in Pacific Northwest (PNW) vineyards was characterized by sequencing the entire coat protein (CP) and a portion of the heat-shock protein-70 homolog (HSP70h) genes. Phylogenetic analysis of CP and HSP70h nucleotide sequences obtained in this study and corresponding sequences from GenBank revealed segrega...

Remote hyperspectral imaging of grapevine leafroll-associated virus 3 in cabernet sauvignon vineyards

Grapevine leafroll disease (GLD) is considered to be one of the most economically destructive viral diseases of grapevines worldwide, resulting in reduced vine vigor, yield reductions, and poor fruit quality. Five pathogens (grapevine leafroll-associated viruses) are recognized as causal agents of this disease, of which Grapevine leafroll-associated virus 3 (GLRaV-3) is the most common. Althoug...

Review of Ecologically-Based Pest Management in California Vineyards

Grape growers in California utilize a variety of biological, cultural, and chemical approaches for the management of insect and mite pests in vineyards. This combination of strategies falls within the integrated pest management (IPM) framework, which is considered to be the dominant pest management paradigm in vineyards. While the adoption of IPM has led to notable and significant reductions in...