1 / 6

Enhancing Freeze Protection in Pear Trees: 2008 Study Results

Learn about techniques to protect European pear trees from freeze damage, impacting flower buds and cold hardiness. Explore the effects of various treatments on crop yields in the following year. Trials and acknowledgements included.

lmitchel
Download Presentation

Enhancing Freeze Protection in Pear Trees: 2008 Study Results

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Freeze Protection in European Pear 2008 Kitren Glozer Department of Plant Sciences, UC Davis Rachel Elkins UCCE, Lake & Mendocino Counties

  2. Flower buds and cold hardiness • Cold hardiness is reduced by • low chill accumulation • cycling warm and cold periods in dormant season • Delayed entry into dormancy • poor nutritional status • Buds ‘at risk’ have poor vascular connections, lower sink strength, low nutrient status and PGR production

  3. 3/26 4/6 4/7 Dates of Treatment = tight cluster & 10-20% bloom Killer Freeze Post PetalFall

  4. Most promising results after April 20 freeze • ProGibb (GA3) + Promalin (GA4+7) with BlightBan @ early bloom • ProGibb + Promalin @ early bloom • BioForge (2% N from urea, 3% soluble potash K2O) – only timing tested was @ tight cluster • ProGibb + Promalin @ tight cluster • Most of crop was lost to late freeze • Return bloom and yields from 2008 treatments will be evaluated in 2009 • Trial will be repeated in 2009

  5. Acknowledgements Our appreciation to our grower-cooperator and to the California Pear Advisory Board for ongoing support

More Related