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Multisite Fungicides for Fungicide Resistance Management in Blueberries

In conventional blueberry production, fungicides are frequently used to manage blueberry diseases. Unfortunately, as a result of repeated fungicide usage, the fungi targeted by these chemicals can develop resistance to specific fungicide modes of action.  This ultimately can make these fungicides less effective for disease management.  To reduce the chances…
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Algal Stem Blotch on Blueberry

Current Situation             Wet weather across Georgia’s blueberry production belt during 2021 has led to some usual and some unusual disease issues in recent months. Through mid-September, 2021 rainfall in Alma, Georgia is running about 12 inches above normal, and rainfall in Homerville, Georgia is over 16 inches above normal….
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Resource Announcement: Propagating Disease-Free Blueberry Plants from Softwood Cuttings

A new bulletin on blueberry propagation from UGA Cooperative Extension has recently been published. In this bulletin, authors Haralson, Brannen, and Oliver present a set of best practices for blueberry propagation that will help to minimize losses and improve the quality of plants produced. The bulletin is available through UGA…
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Field evaluation of spray programs for management of anthracnose fruit rot of blueberry

By: Jonathan E. Oliver (UGA Fruit Pathologist), James Jacobs (UGA County Extension Coordinator, Pierce, Charlton, and Brantley Counties), Zack Williams (UGA County Extension Agent, Bacon County), Renee Holland (UGA Area Extension Agent – Commercial Blueberry) Background Anthracnose fruit rot of blueberry is caused by the fungi Colletotrichum acutatum and Colletotrichum…
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Fruit Splits and Yeast Rot in Blueberries

As a follow-up on Dr. Sial’s post from last week, I have also received several calls from Extension Agents about the prevalence of soft fruit and fruit splits. Furthermore, in addition to reports of berry splits, we’ve received reports that yeast rot has been found affecting some of this fruit….
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Mummy Berry Threat is HIGH (as of 2/17/20)

Recent warmer, damp weather has led blueberry growers in the southern region of Georgia to initiate sprays for mummy berry disease. According to the mummy berry model developed by Dr. Harald Scherm (UGA), there is a HIGH RISK for mummy berry disease initiation in southern Georgia as of February 17th, 2020.  Growers…
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Mummy Berry Risk Remains Low (as of 1/15/19)

In the southern region of Georgia, recent bouts of warmer than normal weather and earlier than normal emergence of leaves has led to the question of whether there is currently a risk of mummy berry infections developing. According to the mummy berry model developed by Dr. Harald Scherm (UGA), as of…
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Disease Development Following 2018 Freeze Damage

Following the damage to blueberries in Georgia caused by recent freezes, the threat exists for subsequent damage from fungal pathogens. On tissues already damaged by the freezes, two fungal pathogens of particular concern are Botrytis and Botryosphaeria. Botrytis The fungus Botrytis cinerea causes Botrytis flower blight and fruit rot on…
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