John Duarte: “California had since the 1950s and 60s, been using a…”

“An underground aphid? Yeah, it's a small aphid that eats the roots. Now this problem killed grapevines all over the world. Yeah. So when I got out of College in University, California had since the 1950s and 60s, been using a rootstock with unsufficient levels of phloxer resistance. And so when we came out, the industry was not only hitting, you know, great growth in the wine demand, but it was also hitting a big replacement cycle to take out old AXR1 vineyards and put in new phlox resistant rootstocks.” (13:33–13:40)

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