| a single dominant locus, ren4, confers rapid non-race-specific resistance to grapevine powdery mildew. | in the present study we screened the progeny of vitis vinifera × v. romanetii populations segregating for resistance to powdery mildew and determined the presence of a single, dominant locus, ren4, conferring rapid and extreme resistance to the grapevine powdery mildew fungus erysiphe necator. in each of nine ren4 pseudo-backcross 2 (pbc(2)) and pbc(3) populations (1,030 progeny), resistance fit a 1:1 segregation ratio and overall segregated as 543 resistant progeny to 487 susceptible. in full-s ... | 2011 | 21091183 |
| impact of sulfur on density of tetranychus pacificus (acari: tetranychidae) and galendromus occidentalis (acari: phytoseiidae) in a central california vineyard. | sulfur is the oldest and most widely used fungicide in the vineyards of california, where it is used for control of powdery mildew (uncinula necator [schw.] burr). for decades, sulfur use has been associated with outbreaks of tetranychus pacificus mcgregor (acari: tetranychidae) on cultivated grapes in the san joaquin valley. i undertook large-scale field studies to test this association, to evaluate the impact of sulfur on galendromus occidentalis (nesbit) (acari: phytoseiidae), a major predato ... | 2007 | 17611804 |