IFAS News

University of Florida

UF/IFAS imaging system can detect citrus greening before symptoms show

Topic(s): Agriculture, Citrus, Extension, New Technology, Research

Small lopsided fruit from greening-infected citrus tree.  Spring 2008 Impact Magazine image.  UF/IFAS File Photo.

GAINESVILLE, Fla. — A time-lapse polarized imaging system may help citrus growers detect greening before the plant’s leaves show symptoms, which should help growers as they try to fend off the deadly disease, a new University of Florida Institute of Food and Agricultural Sciences study shows.

For the new study, Won Suk “Daniel” Lee and Alireza Pourreza wanted to know how early citrus leaves with greening can be detected while they are pre-symptomatic. So they inoculated plants with the greening disease and put those leaves through a time-lapse imaging system.

There, they found starch in the leaves, an early sign of greening, said Pourreza, a former post-doctoral researcher in the UF/IFAS agricultural and biological engineering department. In their study, UF/IFAS researchers detected greening about one month after they infected the trees, he said.

Timely detection and removal of greening-infected trees are necessary to manage the disease, said Lee, a UF/IFAS agricultural and biological engineering professor and an author on the study.

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UF/IFAS FAWN system helps growers save water, money

Topic(s): Agriculture, Citrus, Crops, Departments, Economics, Extension, IFAS, New Technology, RECs, Research, Weather
Rick Lusher, standing, and George Braun, field site supervisor for FAWN, install a temperature sensor at a monitoring station located at UF's Plant Science Research and Education Unit in Citra, Fla.  Spring 2008 Impact Magazine image.  UF/IFAS File Photo.

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GAINESVILLE, Fla. — Citrus grower James Shinn remembers days when he and his workers would rush out as early as 5 p.m. to turn water pumps on to irrigate his crops. “We had no idea when the temperature would drop, so we had to get out there early and get the water going.”

Now, researchers with the University of Florida Institute of Food and Agricultural Sciences are helping state growers save millions of dollars via a tool to gauge weather in agricultural areas.

The Florida Automated Weather Network (FAWN), was started in 1998 to provide weather decision-making data in agricultural regions, said Rick Lusher, director of FAWN. While all National Weather Service tools are located at airports, FAWN stations are located in agricultural areas, he said.

“We estimate that if farmers use FAWN tools to determine when to irrigate their crops, they can save millions of dollars and millions of gallons of water,” Lusher said.

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UF/IFAS avocado irrigation app should save money, water

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

Kati Miggliacio at a research turfgrass plot on UF's campus.  Photographed for the 2015 Research Discoveries report.

Please see caption below story.

GAINESVILLE, Fla. — Avocado growers now know that a University of Florida Institute of Food and Agricultural Sciences mobile irrigation app works well to save money while maintaining crop yields. This data, reported in a new study, is critical for an industry that has a $100 million a year economic impact on Florida.

It’s also important because agriculture uses about 70 percent of the world’s water, the study’s authors say. Feeding the world’s population may require 50 percent more water than was needed in 2012, according to the World Water Assessment Program’s report to the United Nations. Thus, scientists are concerned about meeting the world’s food demand. Conserving agricultural water use through efficient irrigation scheduling would alleviate some of the burden of the increased demand.

To get the best irrigation results, many scientists use a combination of weather data and rates of evapotranspiration, a measure of how much water leaves the plant and its surrounding soil. UF/IFAS scientists tested data for average evapotranspiration for different periods of days. They also compared wet seasons versus dry seasons, said Kati Migliaccio, a UF/IFAS professor of agricultural and biological engineering and lead author on the study.

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UF/IFAS-led team finds faster, better way to detect salmonella in meat, chicken

Topic(s): Extension, Families and Consumers, Food Safety, IFAS, New Technology, Research, Safety

2013 Small Farms Conference on Friday, August 2nd.  UF/IFAS Photo by Tyler Jones.

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GAINESVILLE, Fla. — A team of scientists led by University of Florida Institute of Food and Agricultural Sciences researchers has found a faster and more precise way to detect salmonella in beef and chicken, a finding that could help prevent major illnesses.

Salmonella is the lauding cause of bacteria-associated foodborne illnesses in the United States, according to the study. Thus, early detection of the pathogen, by a rapid and sensitive test is important to prevent the illness.

In a newly published study, researchers artificially contaminated food with salmonella. They then tested the food samples using Salmonella-specific antibodies combined with a unique signal amplification technique. Their test found salmonella present after 15 hours and removed other microorganisms that sometimes clutter laboratory results. This is shorter than the two to three days it takes to detect salmonella in a culture, the study shows.

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UF/IFAS Extension provides Suwannee farmers with valuable water-saving tool

Topic(s): Agriculture, Crops, Extension, IFAS, New Technology

Citra, Pivot irrigation watering fields. UF/IFAS Photo: Josh Wickham

LIVE OAK, Fla. — During most of this last year, Suwannee County farmer Sammy Starling never had to guess when he did—or didn’t—need to water his corn. With a new smart-agriculture technology, he could access soil moisture readings right from his phone, with updates every three hours.

This information helped Starling determine when to turn on the irrigation system and when to skip a cycle. “It’s a window to the underground world,” he said.

Thanks to a University of Florida Institute of Food and Agricultural Sciences Extension experimental trial, Starling was one of three farmers in the Suwannee River Valley who got the chance to test drive this water-saving technology.

By showing farmers how to use and benefit from these sensors, the trial encouraged producers to adopt best management practices (BMPs) set out by the Florida Department of Agriculture and Consumer Services, said Patrick Troy, regional specialized agent in row crops who has spearheaded the initiative.

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Injecting citrus tree trunks with bactericide may help stem greening

Topic(s): Agriculture, Citrus, IFAS, New Technology, RECs, Research

Dr. Nian Wang, professor at the Citrus Research and Education Center.  Photo taken 03/08/16.

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GAINESVILLE, Fla. — A chemical treatment known as a bactericide could help preserve citrus trees from the potentially deadly and costly greening disease, a new University of Florida Institute of Food and Agricultural Sciences study shows.

Citrus is estimated as a $10.9 billion-a-year industry in Florida and the finding could be key to helping the state’s citrus growers and its economy. Citrus greening has cost Florida $3.6 billion in economic damage since it was first discovered in 2005, according to previous UF/IFAS studies. It is projected that more than 80 percent of citrus trees have been infected by greening.

Nian Wang, a UF/IFAS associate professor of microbiology and cell science, led the latest study, which found that when a bactericide – in this case, oxytetracycline — is injected into the trunk of greening-infected citrus trees, it helps keep the trees alive by thwarting greening, also known as Huanglongbing, or HLB.

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UF/IFAS researcher wins global award for space life sciences

Topic(s): Environment, Honors and Appointments, IFAS, New Technology, Research

FERL AWARD 072016

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GAINESVILLE, Fla. — A UF/IFAS horticultural sciences professor, known worldwide for research on growing plants in space, has won the 2016 Jeffries Aerospace Medicine and Life Sciences Research Award.

The award is given to a member of the aerospace exploration community who embodies the innovation and insight exemplified by American physician, John Jeffries, who was the first person — back in 1786 — to utilize aeronautics to collect scientific data.

Robert Ferl, who researches how plants can grow in space, won the award. Specifically, Ferl was cited for conducting cutting-edge space biology research and for mentoring others in spaceflight research, pushing the boundaries of where biology can travel.

“I was surprised and enormously honored to win the award,” said Ferl, who was recognized this month in Vienna, Austria. “For a space biologist, recognition by the engineers — the rocket builders, the space suit designers, the people who plan the missions — is a huge honor that acknowledges the role of fundamental science in moving life into space.”

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Entomologist joins UF/IFAS to help solve citrus greening

Topic(s): Agriculture, Announcements, Citrus, Crops, Entomology and Nematology, Extension, IFAS, New Technology, RECs, Research

Qureshi

FORT PIERCE, Fla. – An entomologist with 10 years of research focused on the state’s iconic citrus industry has joined the faculty of the University of Florida Institute of Food and Agricultural Sciences’ Indian River Research and Education Center.

Named Entomologist of the Year in 2012 by the Florida Entomological Society, Jawwad A. Qureshi was selected for a new position as assistant professor of entomology at UF/IFAS IRREC, near Fort Pierce, Florida. The UF/IFAS Fort Pierce location is part of the university’s statewide service to agriculture, providing research, extension and education for producers.

“Dr. Qureshi is one of the world’s few entomologists who have expertise in integrated pest management focused specifically on citrus,” said UF/IFAS IRREC interim director Ronald D. Cave. “His work is much needed in the region known worldwide for the highest quality fresh citrus product.”

According to Cave, Qureshi’s expertise with insect pest management for the citrus industry is critically valuable to the state’s citrus industry at a time when huanglongbing (HLB), also known as citrus greening, has had a negative impact on the crop statewide.

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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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New method tells growers more about citrus decay

Topic(s): Agriculture, Citrus, Economics, Environment, IFAS, New Technology, Pests, Research, Weather

Citrus Decay Detection 063016

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GAINESVILLE, Fla. — With citrus growers trying to save their groves in the wake of the deadly greening disease, a University of Florida Institute of Food and Agricultural Sciences researcher has found a new technique that could help growers answer a vexing question – why so much fruit is dropping to the ground prematurely.

If we know why fruit is dropping, we can better figure out what caused it to drop – factors such as temperature, wind, humidity, rainfall, citrus greening or other factors, said Wonsuk “Daniel” Lee, a UF/IFAS professor of agricultural and biological engineering.

While there is no known cure for greening, it’s important to know its locations and how much damage the disease caused at those sites so growers can mitigate the disease, a new study led by Lee says.

One indicator of the severity of damage is the number of dropped fruit. The other is how much the fruit has decayed once on the ground.

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