Powdery mildew, caused by the fungus Erysiphe (Uncinula) necator is a grapevine disease of nearly universal importance, often requiring 10 to 15 annual fungicide applications for its control. In the field, disease severity on fruit and leaves provided good sunlight exposure was typically twoand sevenfold lower, respectively, than on those in the shade. Controlled-environment studies showed that...

E. pisi was thought to be the only causal agent of powdery mildew in peas, with three genes, er1, er2 and Er3, conferring resistance this pathogen. Recently, trifolii has also been found cause disease peas different countries, but its relevance pea worldwide is unknown. The objective study develop a method identify quantify use it analyze relative prevalence fields Spain Tunisia. We wanted disc...

Powdery mildew disease, caused by Erysiphe cichoracearum, is considered one of the most severe pathogenic threats sunflower worldwide. This study discusses how to improve effect biocontrol agents, as a more economic and eco-friendlier alternative fungicides, mixing different bioagents (Trichoderma harzianum Bacillus subtilis) with antioxidants (ascorbic acid salicylic acid), either individually...

Powdery mildew (PM), caused by fungus Erysiphe necator, is one of the most devastating diseases of grapevine. To better understand grapevine-PM interaction and provide candidate resources for grapevine breeding, a suppression subtractive hybridization (SSH) cDNA library was constructed from E. necator-infected leaves of a resistant Chinese wild Vitis quinquangularis clone "Shang-24". A total of...

In this study, we cloned a new chitinase gene, EuCHIT2, from Eucommia ulmoides Oliver (E. ulmoides) using rapid amplification of cDNA ends (RACE) technology and constructed an overexpression vector, pSH-35S-EuCHIT2, to introduce it into tobacco (Nicotiana tabacum cv. Xanthi). Resistance to Erysiphe cichoracearum de Candolle (E.cichoracearum DC) and molecular mechanisms in the transgenic tobacco...

This study aimed to characterize the effects of bunch rot and powdery mildew on the primary quality parameter of wine, the aroma. The influence of these fungal diseases was studied by comparative Aroma Extract Dilution Analyses (AEDA) and sensory tests. The effect of bunch rot was investigated on three grape varieties, namely White Riesling, Red Riesling and Gewürztraminer and that of powdery m...