West Nile virus spreads

Also in this issue:

Comparison of vector-virus relationships of strawberry crinkle plant Rhabdovirus in two aphids (Chaetosiphon fragaefolii and C. jacobi) infected by injection

Water quality key to state's prosperity

Letters

Correction on GE cotton in California

Sudden oak death genome mapped

No safe place to sit in tick-infested forests

Courses help ranchers, farmers mitigate water-quality impacts

Dairy workers learn husbandry, management skills

Preventing Johne's disease is good all-around dairy practice

Cattle grazing has varying impacts on stream-channel erosion in oak woodlands

Long-term grazing study in spring-fed wetlands reveals management tradeoffs

Transparency tube provides reliable water-quality measurements

Aerial application of clopyralid demonstrates little drift potential and low toxicity to toads

Alternative techniques improve irrigation and nutrient management on dairies

Accuracy of cotton-planting forecasts assessed in the San Joaquin Valley

California handlers describe marketing issues for organic kiwifruit