Aoki, Y., Kawagoe, Y., Fujimori, N., Tanaka, S., and Suzuki, S. 2015. Monitoring of a single point mutation in the PvCesA3 allele conferring resistance to carboxylic acid amide fungicides in Plasmopara viticola populations in Yamanashi prefecture, Japan. Plant Health Progress doi:10.1094/PHP-RS-140041. The use of the carboxylic acid amide (CAA) fungicide mandipropamid to manage grapevine downy ...

In order to investigate phylogenetic relationships of the Peronosporomycetes (Oomycetes), nuclear large subunit ribosomal DNA sequences containing the D1 and D2 region were analyzed of 92 species belonging to the orders Peronosporales, Pythiales, Leptomitales, Rhipidiales, Saprolegniales and Sclerosporales. The data were analyzed applying methods of neighbor-joining as well as maximum parsimony...

Knowledge about the fungal spores most abundant in the atmosphere of a vineyard is of great use since it allows development of prediction models of the spore concentration, and therefore application of phytosanitary treatments only when high levels of fungal propaguls are detected. In this study the concentration of phytopathogenic spores is related with the different phenological stages of the...

The investigation of Plasmopara viticola, that spends most of its life cycle inside of leaves, requires specific staining techniques. It is desirable to visualize both, host cells and parasitic structures, given their silimar chemical constitutions, especially in reference to the cell wall. On the basis of appropriate staining procedures it was possible to demonstrate parasitic structures durin...

Oomycetes, or water moulds, are fungal-like organisms phylogenetically related to algae. They cause devastating diseases in both plants and animals. Here, we describe seven oomycete species that are emerging or re-emerging threats to agriculture, horticulture, aquaculture and natural ecosystems. They include the plant pathogens Phytophthora infestans, Phytophthora palmivora, Phytophthora ramoru...

The gene xysA from Streptomyces halstedii JM8 encodes a protein of 461 amino acids (Xys1) which is secreted into the culture supernatant as a protein of 45 kDa (Xys1L). Later, this form is proteolytically processed after residue D-362 to produce the protein Xys1S, which conserves the same xylanolytic activity. The cleavage removes a domain of 99 amino acids that shows similarity to bacterial ce...

Tecan Journal 3/2003 4 www.tecan.com Research on plant diseases Downy mildew, caused by the oomycete Plasmopara viticola, is one of the most important grape (Vitis vinifera) diseases, which needs to be controlled by preventive fungicide application to reduce its erratic appearance and high reproduction potential. One of the research areas of the group of Cesare Gessler at the Institute of Plant...