California: Walnut Blight: Dealing With Resistance — It’s Complicated Apr 12, 2019

🕔Apr 12, 2019
Walnut Blight Disease Cycle Walnut blight is caused by the bacterial pathogen Xanthomonas arboricola pv. juglandis (Xaj). This devastating bacterium can overwinter in between scales of healthy buds, “waiting” to […]

California Walnuts: Walnut Blight – New Tool And What You Need To Know Mar 10, 2018

🕔Mar 10, 2018
For many, 2017 will be remembered as a tough year for walnut blight. A long, wet spring meant conditions were ideal for Xanthomonas arboricola pv. juglandis (Xaj), the bacterium that […]

California Walnuts: Managing Points For Walnut Blight Apr 4, 2017

🕔Apr 4, 2017
Walnut blight is the result of infection by the bacterium Xanthomonas arboricola pv juglandis (Xaj). All green tissue is susceptible to infection, including buds, flowers and leaves but nut infections […]

California Walnuts: Orchard Management Considerations: Budbreak through Early Summer Apr 4, 2017

🕔Apr 4, 2017
APRIL Stay on top of your blight sprays, especially if we have rain around “prayer stage” of leaf out. More details here. The first flight of codling moth typically starts […]

California Walnut Blight: Ins and Outs Of Dealing With This Disease Mar 8, 2015

🕔Mar 8, 2015
Walnut blight can affect all varieties, but it’s most serious on early blooming cultivars. Walnut orchards with high populations of over wintering bacteria may be seriously damaged during years favorable […]

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