Jonathan Oliver
-
Authors: Dr. Zilfina Rubio Ames, Assistant Professor and Small Fruit Extension Specialist, University of Georgia, Tifton Campus; Dr. Jonathan E. Oliver, Associate Professor and Fruit Pathologist, University of Georgia, Tifton Campus Background and Recent Observations Blueberry plants in southern Georgia have faced numerous unusual environmental (weather) stresses over the past year. On September 27th, 2024,…
-
Plants need water to grow, but rainfall near harvest can have negative impacts on blueberries. One of these is the tendency for ripe fruit to split after rainfall (Figure 1). Rain splitting typically occurs when water is imbibed through the skin of ripe berries. Likewise, water taken up by the roots can also contribute to…
-
As the UGA blueberry pathologist, I frequently get pictures of damage to blueberry fruit. Sometimes this damage is caused by a pathogen (fungus, bacteria, etc.) and sometimes this damage is caused by other factors (insects, environmental factors, or especially chemicals). The applications of blends of multiple chemicals, fertilizers, etc. are frequent in agriculture and can…
-
Hurricane/Tropical Storm Helene affected much of Georgia’s agriculture, including blueberries. Both wind and extreme rainfall caused their share of issues. In some parts of Georgia’s blueberry-growing region, wind damage (resulting in broken limbs, lost leaves, and blown-over bushes) seems to have caused most of the damage, while in other areas, extreme rainfall seems to have…
Posted in: Disease Management -
Hurricane/Tropical Storm Debby has brought lots of rain to southeastern Georgia in just a short time. Rainfall totals of over 5 inches were recorded across much of the blueberry growing region in southeastern Georgia in less than 48 hours this week (Nahunta – 7.8 inches, Waycross – 6.4 inches, Alma – 6.3 inches, Lake Park…
Posted in: Disease Management -
In recent days, we’ve received multiple reports of algal stem blotch on blueberry in Georgia. In contrast to the fungal, bacterial, or viral diseases that typically afflict our crop plants, algal stem blotch, as the name indicates, is actually caused by a species of parasitic alga. This, in and of itself, makes it an oddity…
Posted in: Disease Management -
It has been almost 30 days since we have had appreciable rainfall across much of the blueberry growing region in southern Georgia. While most locations in the southern half of the state are not technically in a “drought” (see https://droughtmonitor.unl.edu/), it has certainly been dry for the past month. (At my house in Tifton, for…
Posted in: Disease Management -
Georgia blueberry growers are invited to attend an upcoming Blueberry Fruit Quality Webinar on Thursday, October 13th @ 7PM. Members of the UGA Extension Blueberry Team including Dr. Jonathan Oliver, Dr. Zilfina Rubio Ames, and Dr. Angelos Deltsidis will provide a brief overview of factors affecting blueberry fruit quality, highlight recent efforts to elucidate the…
Posted in: Grower Meetings -
University of Georgia Extension and the Southern Region Small Fruit Consortium hosted the first Blueberry IPM Academy for county and area extension professionals in the southeastern U.S. during fall 2021. This event featured presentations by blueberry extension specialists from the Southeast on numerous topics including: Cultural Practices and Fertility, Harvesting and Management, Insect Management, Disease…
-
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. BotrytisThe fungus Botrytis cinerea causes Botrytis flower blight and fruit rot on blueberry. Cold-damaged blooms, shoots, and fruit can readily…
Posted in: Disease Management