Natural extracts, and particularly plant by-product can represent an eco-friendly alternative to synthetic pesticides control crop diseases. We produced extract from a mix of grapevine trunk roots that contain high amount complex stilbenes (grapevine phytoalexins), especially ?- r-viniferins. This conferred protection grapevines against Plasmopara viticola (the causal agent downy mildew) by dis...

Fungal plant pathogens are common in natural communities where they affect plant physiology, plant survival, and biomass production. Conversely, pathogen transmission and infection may be regulated by plant community characteristics such as plant species diversity and functional composition that favor pathogen diversity through increases in host diversity while simultaneously reducing pathogen ...

The resurgence of cucurbit downy mildew has dramatically influenced production of cucurbits and disease management systems at multiple scales. Long-distance dispersal is a fundamental aspect of epidemic development that influences the timing and extent of outbreaks of cucurbit downy mildew. The dispersal potential of Pseudoperonospora cubensis appears to be limited primarily by sporangia produc...

Callose plays an important role in plant development and response to multiple biotic abiotic stresses. synthase (CalS; EC 2.4.1.34), the main enzyme callose synthesis, has been studied a number of crops but not cucumber (Cucumis sativus L.). In this study, 10 genes encoding putative were identified classified into four clades. Expression levels CsCalS genes, which varied considerably, detected ...

Downy and powdery mildews are two of the main diseases threatening grapevine cultivation worldwide caused by phytopathogens Plasmopara viticola Uncinula necator, respectively. These may cause severe damage to grapevines inducing wilting plant organs, including bunches, especially when vines untreated. This fact, together with widespread these pathogens due large extensions land dedicated monocu...