may-jun-2020

Website Resources • A free publication on irrigation management with the pressure chamber is available at: ucanr.edu/datastoreFiles/391-761.pdf • Details on mite monitoring, including a printable, sampling form to record pest and predator levels is available at: ipm.ucanr.edu/PMG/C003/m003fcspdmites02.html • Info on the biology of mites along with options for control materials is available at: ipm.ucanr.edu/agriculture/almond/webspinning-spider-mites/ • The most recent (2020) UC IPM Fungicide Efficacy and Timing tables are available at the very end of the newsletter at: cecolusa.ucanr.edu/newsletters/Orchard_Topics83230.pdf • Details on ant monitoring, bait use and materials are available at: ipm.ucanr.edu/agriculture/almond/Ants/ • Info on biology and control of both at: ucanr.edu/sites/vpce/ • Dust reduction education information is available in English and Spanish at: almonds.com/growers/in-the-orchard/harvest/harvest-dust • COVID-19 resources can be found at: aghealth.ucdavis.edu/COVID19 and almonds.com/growers IN YOUR ORCHARD following late rains. If disease symptoms are widespread in the orchard, don’t use single-site or pre-mixtures of single- site fungicides. The risk of accelerating fungicide resistance is too great to justify use of single site materials. Also, spraying may not provide much control if the disease is widespread in the orchard. May and June is an important time for hull rot control. This damaging condition, caused by several different pathogens, requires use of several control approaches for the best results. Orchards where Monilinia hull rot infections are common should be sprayed with an effective fungicide three to four weeks ahead of hull split, usually in early June. Where Rhizopus or Aspergillis pathogens cause hull rot, 4 2 A L M O N D F A C T S