University of Georgia Assistant Professor and Citrus Extension Specialist Mary Sutton recently provided an update on Georgia citrus. Topics she addressed include fruit split, sunburn and upcoming fruit quality evaluations.
FRUIT SPLIT
Fruit split is still being seen “pretty regularly,” Sutton reported. She noted that this is normal in summer, especially when there are extreme fluctuations between dry and wet weather.
“Keeping irrigation consistent during extended dry periods can help prevent split,” she stated.
Sutton added that fruit split provides an opening for diseases or pests.
FRUIT SUNBURN
Sunburn is being seen on some satsumas and mandarins, Sutton reported. Sunburn is typically seen on the portion of the peel that received direct sunlight. The sunburned fruit will have a large leathery area on the peel, and the juice vesicles underneath can also dry out and become tough. There are multiple sunscreen protective products available that can help prevent this burn.
FRUIT DEVELOPMENT
Most fruit is still very green, but cooler weather in coming weeks should lead to fruit turning color.
“Generally, night temperatures between 46°F and 59°F will help with color development,” Sutton stated. “We should also see our Brix increase and acid levels decrease as we get closer to harvest.”
FRUIT EVALUATIONS
“Moving on into the fall, we’re looking ahead to our fruit-quality evaluations,” said Sutton.
Last year, researchers surveyed approximately 25 different citrus cultivars grown in Georgia. They collected information about fruit size, peel color, fruit firmness, juice content, Brix and acid.
“We are hoping to continue this survey again this year,” she said. “The goal of this project is to characterize how these different citrus cultivars perform in Georgia. The hope is that this information will be useful in selecting cultivars for new plantings in the future. If anyone is interested, we only need (approximately) 20 to 30 pieces of fruit for the tests.”
She added that identifying information related to the fruit testing would not be included in any future publications or discussions