Managing phosphorus deficiency in vineyards

Name: IPM NETWORK BREAKFAST MEETING: POWDERY MILDEW & BARN OWLS
Start: 2026-04-07T08:00:00-07:00
End: 2026-04-07T09:30:00-07:00
Location: Burgundy Hall – Lodi Grape Festival Grounds

First Paragraph: In the early 1980's, UC Davis professor James A. Cook and co-workers first observed phosphorus (P) deficiency in California North Coast hillside vineyards and the foothills of the Sierra Nevada. Affected vines were discovered with stunted shoot growth, poor fruit set, and characteristic leaf symptoms. Research and field experience have since increased our understanding of and ability to manage low levels of phosphorus in vineyards.