Question: We bought a small vineyard and have noticed that the whitish-yellow speckles and blotches on our grapevine leaves are looking worse and worse. Barb B., Placitas Answer: I had the pleasure of ...

Q: My grapevine has started to leaf out. What is the spray I need to use to prevent the leaf eaters? I saw a black wasp-like bug today. A: That black wasp-like insect was actually a moth and does not ...

Q: Although I was able to control the grape leaf skeletonizer all summer, I came back from a three week trip with 99 percent of the leaves stripped and dried up. The grapes were picked in August and ...

NAPA – This week, Napa County agriculture officials put out a warning that they have discovered an animal that they describe as a "voracious feeder" that sounds like something from a monster movie.

Q: The leaves of my grapevines are being chewed up by a funny-looking caterpillar that I’ve never noticed before. I’m embarrassed for anyone to see how bad the vines look. How should I fight this ...

Grape phylloxera, or Daktulosphaira vitifoliae, is an aphidlike insect that attacks grapevines with devastating effects. In Colorado, where wine is an estimated US$3.9 billion dollar industry, ...

An unwelcome guest was found creeping among Napa County vines this month. On May 12, Jesse Guild, an insect trapper in the area, was checking traps in the Pope Valley when he found a western grapeleaf ...

Grape phylloxera -- the insect that nearly wiped out wine production at the end of the 19th century in France -- hijacks a grape vine's reproductive programs to create a leaf gall, which it uses as a ...

Add Yahoo as a preferred source to see more of our stories on Google. Colorado's $3.9 billion wine industry is threatened by a tiny aphid. Courtesy of Charlotte Oliver Grape phylloxera, or ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Charlotte Oliver, Colorado State University (THE CONVERSATION) Grape phylloxera, or ...