IFAS News

University of Florida

UF/IFAS Everglades REC offers free plant workshop to middle, high school teachers on Sept. 27

Topic(s): Agriculture, Crops, Departments, Environment, IFAS, Invasive Species, Lawn & Garden, Pests, RECs

Arabidopsis trials in the lab as part of Ana Lisa Paul's plants in space research program.  Photo taken 01/29/16.

BELLE GLADE, Fla. — Want to teach your students the good, the bad and the ugly about plants while incorporating three different sciences? Researchers at the UF/IFAS Everglades Research and Education Center will lead the second annual workshop, “Don’t Get Caught with Your Plants Down,” from 8:30 a.m. to 3 p.m. on Tuesday, Sept. 27.

The free workshop will be held at UF/IFAS Everglades Research and Education Center, 3200 East Canal Street, Belle Glade, Florida. Breakfast and lunch will be provided, and in-service points for professional development will be awarded by school districts through Master Inservice Plans (MIP).

This year’s program, developed by the UF/IFAS department of plant pathology, uses resources available from the American Phytopathological Society, said Richard Raid, a professor of plant pathology and workshop organizer. Middle and high school teachers will take back vital information to students on the importance of plants in daily life, he said.

Florida is home to the most invasive species in the country, and many travel in to the state via plants, Raid explained.

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UF/IFAS researcher: Insects increase metabolism to adapt to dramatic weather change

Topic(s): Agriculture, Departments, Entomology and Nematology, Environment, IFAS, Pests, Research

Daniel Hahn, an associate professor with UF’s Institute of Food and Agricultural Sciences, displays the type of flies he and former postdoctoral associate Giancarlo López-Martínez sterilized under a low-oxygen environment. Their studies demonstrate that doing so results in sterile flies who remain attractive suitors for mates than their counterparts sterilized in normal-oxygen conditions. UF/IFAS photo by Marisol Amador.

 

GAINESVILLE, Fla. — A recent study led by a University of Florida Institute of Food and Agricultural Sciences researcher found that an insect has evolved metabolically in response to an increase in weather cold snaps.

Daniel Hahn, an associate professor in the entomology and nematology department at UF/IFAS, led a team of researchers from UF, the University of California Berkeley, the University of Alabama-Birmingham and Kansas State University in the study of the fly, Drosophila melanogaster. Researchers found that selection to recover more quickly from cold snaps also drove the evolution of higher metabolic rates.

“While we hear a lot about warmer weather in spring and fall, weather fronts will continue to bring bouts of cold,” said Hahn, whose research focuses on ecological and evolutionary physiology. “This makes the transitions from warm to cold temperatures more extreme, and increases the vulnerability of animals and plants to damage from snap freezes.

“Small animals that rely on the environment to regulate their body temperature—like insects, frogs, and even sea turtles—are also susceptible to stress and even death from extreme cold fronts. We found clear changes in metabolism of the fly as it evolves and adapts to the cold snaps.”

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UF/IFAS researchers share safest ways to spray for Zika mosquitoes, protect bees

Topic(s): Agriculture, Entomology and Nematology, Environment, Extension, Families and Consumers, Pests, Safety

A beekeeper holding a hive

Please see caption below the story.

GAINESVILLE, Fla. — Florida beekeepers are concerned after 2.5 million bees that were killed during an aerial spraying with Naled/Dibrom for Zika-carrying mosquitoes in Dorchester County, S.C. Now, Floridians are looking for ways to avoid the same tragedy. Florida is the third-largest beekeeping state in the nation.

Researchers are not surprised that the South Carolina incident has Florida beekeepers worried, said Fred Fishel, professor of agronomy and director of the Pesticide Information Office.

“With the Zika cases in south Florida, and now that scientists have identified mosquitoes that carry the Zika virus, we would expect beekeepers to be concerned about increased pesticide application,” Fishel said. “But, registered beekeepers should be notified before an application of pesticides. That gives them time to protect their bees while spraying is conducted.”

There are pesticides that will not harm bees, but will kill mosquitoes, says William Kern, associate professor of urban entomology at the UF/IFAS Fort Lauderdale Research and Education Center.

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UF/IFAS researchers scramble to find cure for tenacious, costly sugarcane virus

Topic(s): Agriculture, Crops, Departments, Entomology and Nematology, IFAS, Invasive Species, Pests, RECs, Research

1-Sugarcane leaf with yellowing of lower midrib

GAINESVILLE, Fla. — Researchers with the University of Florida Institute of Food and Agricultural Sciences are working to find a cure or develop resistant varieties for a virus that is attacking sugarcane and sorghum throughout the Everglades agricultural region. Florida produces more than 50 percent of all sugarcane in the United States, making it the largest producer in the nation.

The sugarcane yellow leaf virus was first identified in Hawaii during the 1980s. The virus was found in Florida in 1993, said Philippe Rott, a professor of plant pathology at the UF/IFAS Everglades Research and Education Center in Belle Glade, Florida. Symptoms include a yellow stripe down the middle of sugarcane leaves, he said.

“The virus travels down the vascular bundle of the plant and interferes with the movement of nutrients,” Rott said. “This, in turn, stunts the growth of the plant.”

The virus is carried by an aphid, a tiny bug that feeds by sucking sap from plants, said Gregg Nuessly, director of UF/IFAS Everglades REC and a professor of entomology. Nuessly’s and Rott’s research has identified the carrier of the virus, and trials are in progress to see if insecticides are effective at killing the aphid.

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UF/IFAS Extension, Hastings farmers explore sweet potatoes as alternative crop

Topic(s): Agriculture, Crops, Extension, IFAS, Pests, Research

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HASTINGS, Fla. — Back in the 1920s, Danny Johns’ great grandfather was the first farmer in the Hastings area to use a tractor instead of a mule. Now, in a region known for producing potatoes for the potato chip industry, Johns, like his ancestor, isn’t afraid of trying something new.

As of this year, Johns is one of a few commercial farmers in Florida who are growing sweet potatoes, a crop not produced in the state since the sweet potato weevil devastated much of the Florida industry for the commercial, orange sweet type in the 1980s.  Now, with the help of the University of Florida Institute of Food and Agricultural Sciences, growers like Johns have the opportunity to diversify their business with this reemerging crop.

In Florida, potatoes grown for the potato chip industry, or “chipping” potatoes, are planted in January or February and harvested in May or June, said Scott Chambers, farm supervisor at the UF/IFAS Hastings Agricultural Extension Center. Table stock potatoes, potatoes sold fresh, are also planted and harvested at these times.

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As zika spreads, UF/IFAS faculty on front lines battling the virus

Topic(s): Entomology and Nematology, Environment, Extension, Families and Consumers, IFAS, Pests, RECs, Research, Safety

Common Aedes Aegypti mosquito, magnified 2,000 times at the University of Florida's Institute of Food and Agricultural Sciences, 6/28, prepares to feed on human skin. After 15 years of test on more than 3,900 compounds, Jerry Bulter, professor of entomology, has developed a safe, natural insect repellent that protects people against everything from mosquitoes to ticks and tiny "no-see-ums."  Its the first effective alternative to products containing DEET, the most widely used ingredient in insect repellent now on the market. Butler's new herbal repellent is patented by the UF and licensed to a commercial firm.(AP Photo, Jerry Bulter)

Photo of an Aedes aegypti mosquito.

GAINESVILLE, Fla. — University of Florida Institute of Food and Agricultural Sciences faculty are on the front lines in the battle against the zika virus, as entomologists study the ability of at least two mosquito species to transmit the virus and ways of reducing pesticide resistance.

They’re also teaching people statewide about how to prevent spreading zika.

As of Aug. 18, 510 American residents had contracted the virus. Florida has 479 zika cases, according to the state health department; 35 people in Florida have contracted zika via local transmission, meaning they didn’t bring it back from overseas.

Scientists at the UF/IFAS Florida Medical Entomology Laboratory in Vero Beach, Florida, have made Zika a top priority. The virus is most likely transmitted by Aedes aegypti – the yellow fever mosquito – and Aedes albopictus – the Asian tiger mosquito.

In February, when the virus started making international news, Roxanne Connelly, a professor of medical entomology and UF/IFAS Extension specialist at the FMEL, put on a statewide zika webinar to tell Extension faculty the do’s and don’ts of trying to contain zika. One of her key messages – that still holds true — was to get rid of standing water and containers that could get water in them because those are mosquito breeding grounds. The other key element was to wear repellant with DEET.

These days, Connelly is working with other UF/IFAS Extension entomologists such as Faith Oi, the Florida Department of Agriculture and Consumer Services and mosquito control districts on zika educational workshops and school newsletters throughout Florida.

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UF/IFAS hires Eminent Scholar to help in fight against citrus greening

Topic(s): Agriculture, Announcements, Citrus, Departments, Entomology and Nematology, IFAS, Pests

Bryony Bonning

GAINESVILLE, Fla. — The University of Florida Institute of Food and Agricultural Sciences has added another soldier in its battle against citrus greening by hiring world-renowned entomologist Bryony Bonning. She has been named Eminent Scholar with tenure in the UF/IFAS entomology and nematology department.

Currently, Bonning is a professor of entomology at Iowa State University and director of the National Science Foundation Center for Arthropod Management Technologies, where she oversees cutting-edge research on insect physiology and pathology, and biotechnology. Bonning is a recognized authority in the development of new technologies for insect pest management, and a fellow of the Entomological Society of America and the American Association for the Advancement of Science.

“Dr. Bonning brings an outstanding record of accomplishment and cooperation, and we are confident she will work tirelessly to develop solutions for citrus pest management,” said Blair Siegfried, chair of the UF/IFAS entomology and nematology department. “Her combined experience and achievements make her ideally suited and deserving of the position.”

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UF/IFAS research findings could eventually save $30 million annually for strawberry growers

Topic(s): Agriculture, Cultivars, Economics, Environment, Extension, IFAS, Pests, RECs, Research

Strawberry economics 111015 - vance whitaker

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GAINESVILLE, Fla. — Strawberry growers may eventually save $30 million a year with genetic findings from a University of Florida Institute of Food and Agricultural Sciences study.

UF/IFAS researchers are looking for ways to thwart angular leaf spot, a pathogen that can destroy up to 10 percent of Florida’s $300 million-a-year strawberry crop in years with multiple freezes.

In the research, Vance Whitaker, a UF/IFAS associate professor of horticultural sciences, and a team of researchers found genetic markers they believe can lead them to develop strawberry cultivars that are more resistant to angular leaf spot. Genetic markers are short sequences of DNA used to identify a chromosome or nearby genes in a genetic map.

In two years of field trials, researchers at the UF/IFAS Gulf Coast Research and Education Center – along with colleagues from Oregon, The Netherlands and Canada – found places in strawberry genes that show promise for developing cultivars that are resistant to this disease.

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New method could quash squash pests

Topic(s): Agriculture, Crops, Economics, Entomology and Nematology, Extension, IFAS, Pests, Research

Dr. Oscar Liburd conducts research on the management of thrips in blueberries.

Please see caption below story.

GAINESVILLE, Fla. — Florida grows more zucchini squash than anywhere else in America – to the tune of $70 million a year. To help improve production, University of Florida Institute of Food and Agricultural Sciences researchers are developing a method to keep squash pests at bay.

For a newly published study, Janine Spies, a post-doctoral researcher in the UF/IFAS entomology department, simultaneously planted buckwheat with squash and found the method kept pests away while retaining yields at current levels. Furthermore, she and her colleagues manipulated how they planted buckwheat and squash.

“Pests like whiteflies and aphids transmit viruses to squash and can significantly reduce yield, and the money we make on squash,” Spies said. “This is why it is important to reduce the number of whiteflies and aphids that land on squash and to prevent the transmission of viruses.”

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UF/IFAS-developed web tool saves money for strawberry growers in several states

Topic(s): Agriculture, Crops, Economics, Environment, Extension, IFAS, New Technology, Pests, RECs, Research

Strawberry forecasting feature photos for the 2010 IFAS Annual Research Report.  UF/IFAS Photo by Tyler Jones.

GAINESVILLE, Fla. — A UF/IFAS-developed web tool – which has been shown to save Florida strawberry growers $1.7 million a year – is now being used in several other states, including Maryland, Georgia, South Carolina and California.

Florida’s strawberry crop is worth $300 million a year. It’s also important to the national economy. For example, in 2014, the United States produced 3 billion pounds of strawberries, valued at nearly $2.9 billion, according to the Agricultural Marketing Resource Center, a division of the U.S. Department of Agriculture. Florida ranks second to California in strawberry production.

While gaining a foothold in other states, the tool is getting more useful, thanks to work by University of Florida Institute of Food and Agricultural Sciences researchers. Scientists have found a promising model to simulate leaf wetness in plants of strawberries.

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