Weed Management In Blueberries

Blueberry producers have a fair selection of herbicide products to work with, and two additional products were recently labeled: Callisto (mesotrione, Syngenta Crop Protection) and Chateau (flumioxazin, Valent U.S.A.). Current herbicide recommendations are provided each year in Michigan State University Bulletin E-154, Fruit Management Guide. This is an important publication for commercial growers because it provides detailed instructions about how herbicides and other pesticides should be used.

Most growers have two general weed control questions. First is choosing the early season preemergent program. The goal here is to choose an herbicide or combination of products that are strong on the dominant weeds. An effective choice will control most annuals and some perennials through the summer.
The second consideration is how to manage established perennial weeds that are not effectively controlled by available preemergent products. This often requires careful use of glyphosate late in the season.

Preemergent programs Princep (simazine, Syngenta), Karmex (diuron, DuPont Crop Protection), Sinbar (terbacil, DuPont), and Solicam (norflurazon, Syngenta) are the work-horse preemergent herbicides in established blueberries. They control many germinating annual weeds for one to three months. These products can potentially injure blueberries, so be familiar with the label precautions regarding sandy soils and young plants. Princep and Karmex tend to be stronger on broadleaf weeds, whereas Sinbar and Solicam are effective on grasses. Combining broadleaf and grass materials controls a broader spectrum of annual weeds.

New Additions

Callisto and Chateau were labeled for use on blueberries recently. Callisto provides preemergent and post-emergent control of several pigweed species, chickweeds, horsenettle, lambsquarters, marestail, eastern black nightshade, ragweed, and smartweed, but is weak on grasses. Apply Callisto before bloom, either in one 6 fluid ounce per acre application, or two 3-ounce applications at least 14 days apart. Crop oil concentrate (COC) improves postemergent activity, but Callisto with COC may injure blueberry leaves and young stems. Avoid plant contact as much as possible.

Callisto is labeled for young, non-bearing and bearing blueberries. Chateau is primarily a preemergent product with some postemergent activity if applied with surfactant or COC. Chickweeds, dandelion, common groundsel, lambsquarters, Eastern black nightshade, several pigweeds, ragweed, and most annual grasses are controlled. Apply Chateau before budbreak at 6- to 12-ounce product per acre. Bushes need to have been in the field for two years.
Growers should work with Callisto and Chateau to learn how they perform on their farms. These herbicides have different modes of action in plants than the traditional blueberry herbicides such as Princep, Karmex, and Sinbar. As a result, they should be helpful in discouraging development of herbicide resistant weed populations.

Topics:

Leave a Reply

Berries Stories
A bunch of 'Sweet Sensation' strawberries lined up for photo purposes
Berries
December 20, 2016
Table Set for an Extra-Sweet Florida Strawberry Season
Conditions ideal for new, flavorful varieties. Marketing campaign aims to clue-in consumers. Read More
Vance Whitaker next to a bed of strawberries
Berries
December 15, 2016
Scientists: GMOs Not Part of Florida Strawberry Success
Misconceptions about what methods are used to breed new varieties spark need for public outreach. Read More
Action shot of an automated strawberry picker from Harvest CROO
Berries
December 13, 2016
Horsepower Mounting For Real-World Robotic Strawberry Harvesting
National Science Foundation awards grant for further development of potential industry game-changer. Read More
Berries
November 28, 2016
Researchers Develop Lower-Cost Options For Blueberry Harvest Assist Systems
Research team seeks alternatives to over-the-row harvest systems. Read More
Bacterial wilt symptoms in Florida blueberries
Berries
November 16, 2016
Florida Blueberry Growers Warned To Watch For New Deadly Disease
Pathogen has been confirmed on three farms so far. Read More
sun setting amid the clouds
Berries
November 1, 2016
Worker Awarded $700K Following Collapse In Field
Maine man awarded damages following heat stroke, says blueberry grower was negligent in training him for work. Read More
Berries
October 29, 2016
Pest And Disease Diagnosis 101 In Berries
Using some of the experts and information available can help you avoid problems in the berry patch. Read More
The Latest
Berries
January 4, 2017
Growers Say it’s the Best of Times…
Some say there’s an oversupply, some disagree, but despite challenges for the berry industry, most growers remain upbeat about the future. Read More
Berries
January 4, 2017
Input Needed from Strawberry Growers, In…
National Strawberry Sustainability Initiative moves into new phase as growers, managers, nursery operators, consultants, and Extension educators are asked to take an online survey. Read More
Berries
December 30, 2016
Berry Grower Hit with Fine for Water Use
Washington State Department of Ecology alleges grower supplied inaccurate water use figures, illegally irrigated two berry farms. Read More
Berries
December 20, 2016
Table Set for an Extra-Sweet Florida Str…
Conditions ideal for new, flavorful varieties. Marketing campaign aims to clue-in consumers. Read More
Berries
December 15, 2016
Scientists: GMOs Not Part of Florida Str…
Misconceptions about what methods are used to breed new varieties spark need for public outreach. Read More
Berries
December 13, 2016
Horsepower Mounting For Real-World Robot…
National Science Foundation awards grant for further development of potential industry game-changer. Read More
Berries
November 28, 2016
Researchers Develop Lower-Cost Options F…
Research team seeks alternatives to over-the-row harvest systems. Read More
Berries
November 16, 2016
Florida Blueberry Growers Warned To Watc…
Pathogen has been confirmed on three farms so far. Read More
Berries
November 1, 2016
Worker Awarded $700K Following Collapse …
Maine man awarded damages following heat stroke, says blueberry grower was negligent in training him for work. Read More
Berries
October 29, 2016
Pest And Disease Diagnosis 101 In Berrie…
Using some of the experts and information available can help you avoid problems in the berry patch. Read More
Berries
October 10, 2016
Wish Farms Going Bigger, Bolder With Bla…
Central Florida-based operation meeting consumer demand by extending its berry program. Read More
Berries
October 3, 2016
Florida Strawberry Growers Have A Sweet …
Study shows the latest variety from UF/IFAS berry breeders is not only heads and shoulders above others in flavor, but also shelflife and color. Read More
Berries
October 3, 2016
Forget Donald And Hillary – Vote Your Be…
California Giant trending on #BerriesforPresident; strawberries are leading blueberries. Read More
Berries
October 1, 2016
New Mechanical Strawberry Transplanter W…
New tool, developed in California, helps to alleviate labor needs during summer planting season. Read More
Berries
September 24, 2016
Time Is Now For Florida Blueberry Grower…
Coming off a challenging season, industry players must continue to adapt to curveballs thrown by Mother Nature and market forces. Read More
Berries
September 23, 2016
What U.S. Consumers Think About Florida …
For growers, the good news is that shoppers like what you are serving up. But more can be done to whet appetites. Read More
Berries
September 22, 2016
Investors Clamoring For Automated Strawb…
Naturipe joins growing list of backers in the labor-saving vision and mission of ag-tech startup. Read More
Berries
September 22, 2016
It Behooves Blueberry Growers To Protect…
Placing priority on bee care best practices will ensure sweet success for your crop. Read More