David E. Norden was born in Ames, Iowa, on August 2, 1957, the fifth of six children of Catherine and Allen J. Norden. His family moved to Florida in 1958 after his father completed graduate studies at Iowa State University and accepted the job of assistant professor of agronomy at the University of Florida, Gainesville. Growing up in rural Alachua County, he became familiar with the natural and agricultural systems of North Florida. As a teenager, he worked for local farmers during breaks from school and spent free time enjoying the woods and the waters. David graduated from Buchholz High School in Gainesville in 1975 and worked as a tractor driver for the University of Florida vegetable crops department and then as a cabinet maker before enrolling at the University of Florida in the fall of 1977. He graduated from the University of Florida with honors in December 1980 with a Bachelor of Science degree in Plant Science and certificate of specialization in Integrated Pest Management. 

Woodlands May Host Chilli Thrips in Off-Season

Chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) has emerged as an invasive insect pest of specialty crops in Florida, including in strawberry, blueberry, citrus, peppers, and ornamentals. Something to note here is that these insects are commonly called thrips (singular and plural), and the term “thrip” is an incorrect reference to this group of insects. Based on recent field studies, strawberry plants had more than seven times the fruit yield when treated with an insecticide, spinetoram, compared to untreated fields severely infested with chilli thrips. Infested strawberry fruits appear bronzed and cracked and are considered unmarketable. This pest, native to Southeast Asia, migrates into the crop fields from surrounding areas, but little is known about its whereabouts during the off-season. It was assumed that S. dorsalis may have been spending their summer months on other crop hosts, since this is a polyphagous pest (feeding on various types of plants). This information is crucial since increasing the understanding of the non-crop habitats can assist with the management of this severely damaging agricultural pest. 

Best Practices to Maintain Plant Vigor, Balance Growth, and Reduce Pests and Diseases

This article was first published in the Spring 2023 Blueberry News, vol 12, issue 3, p.31

Understanding Brix and Its Role in Blueberries

During the years I ran my family’s blueberry farm, the weeks we ran a u-pick made for some of my fondest memories. But as any grower can tell you, u-picks aren’t all fun and games. They can be tricky to pull off successfully. In the grand scheme of things, our u-pick operations only accounted for 2-3% of our revenue, but I never considered them unsuccessful. Here are some of the tactics I think helped us to be successful.

Tackling the Challenges of Bark inclusions, Girdling Roots, Plant Collars and Stem Blight

The southern highbush blueberry growth habit is a multi-stem bush with cultivated varieties ranging from upright to spreading. The upright varieties like Meadowlark and Farthing tend to have narrower crowns, which lend themselves to more efficient machine harvesting possibilities. Most harvesting machines rely on movable catch plates that conform to the crown as the harvester passes down the row, with wider crowns allowing a larger gap and more fruit escaping the harvester to be lost to the ground. Upright varieties have become popular with growers for this reason and as labor costs continue to increase and labor availability continues to be challenging, to say the least. 

Here I am in the middle of March penning my letter with fresh memories of my time visiting with fellow growers at the Spring FBGA Meeting and Field Day at the University of Florida Education and Research Center in Citra. I’m happy to report that most growers I spoke with are quite optimistic about the season as we enter the main blueberry harvest. Although growing blueberries is much like selling real estate, where performance is naturally local, the general trends are tracking toward a big increase in volume over the tough 2023 season. It’s nice to see Florida growers will likely reap the rewards of their tenacity and hard work as they climb back from the damaging weather and economic shocks that plagued us last year.

Hall of Fame 
Wednesday, Oct. 23
Bonnet Springs Park,
Lakeland, Florida

The tables below list suggested blueberry management items for spring and early summer months. Specific disease, insect, and weed controls are listed in the 2022 Florida Blueberry IPM Guide (https://edis.ifas.ufl.edu/publication/HS380), as well as in subject-specific publications referenced below. Suggested management items for the entire calendar are available in the UF/IFAS Blueberry Growers Guide app and in an EDIS publication, Calendar for Southern Highbush Blueberry Management in Florida (https://edis.ifas.ufl.edu/publication/HS1363).  A list of all UF EDIS blueberry publications can be found at www.blueberrybreeding.com/blog, along with a summary description and link to each.

The University of Florida blueberry breeding program has released two new southern highbush blueberry cultivars that should be available to growers in 2025. These cultivars were selected for the evergreen production system and have performed very well in on-farm trials in both South-Central and Central Florida. They are both early season producers with very high yields, very firm fruit, excellent flavor, and good evergreen foliage. These new releases are “FL17-141” and “FL19-006.” 

Flower Thrips Threaten Fruit Quality, Quantity

The Florida flower thrips (Frankliniella bispinosa Morgan) are a pest of southern highbush blueberries in Florida that are present during bloom. Larvae and adults feed on all parts of the flowers (ovaries, styles, petals) and developing fruit. Feeding damage can reduce pollination of the injured blooms, and therefore the quantity and quality of fruit produced from those blooms. Adult females can also cause indirect injury to fruit when laying their eggs inside flower tissues (Figure 1 c). The newly hatched larvae create holes in the flower tissue when they emerge, resulting in scarring of the fruit. 

Spring Meeting and Farm Tour

January – March 

Weather Pattern Can Affect Nutrient Management and Fungal Disease

Successfully Manage Anthracnose and Botrytis During the Wet Winter Months

With a wet El Niño winter forecasted for Florida in 2024, growers should focus on plans to minimize and manage flower and fruit fungal diseases. Anthracnose fruit rot and Botrytis blossom blight are the most prevalent and significant winter and early spring diseases in Florida.

Blueberry Advisory System Now Available as a Phone App

The Blueberry Advisory System (BAS) is a weather-based alert system that signals Florida blueberry growers when environmental conditions are favorable for the development of anthracnose fruit rot (AFR) and provides other data to help growers manage this disease. 

Virtually all blueberry fields in Florida are subject to late winter or early spring freezes, which can cause serious reductions in yield. This is a list of activities for freeze preparation. The list was originally published by Mike Mainland in the North Carolina Blueberry News, Vol. 7, No. 1and has been modified by IFAS faculty and FBGA board members.