IFAS News

University of Florida

Neighboring termite colonies re-invade; expose themselves to deadly bait

Topic(s): Economics, Entomology and Nematology, Environment, Extension, Families and Consumers, Household Pests, IFAS, Invasive Species, Pests, RECs, Research

Please see caption below story.

GAINESVILLE, Fla. — Even after an insecticide bait weakens Formosan subterranean termites, a neighboring colony will invade the same area and meet the identical lethal fate, new University of Florida Institute of Food and Agricultural Sciences research shows.

The research finding is key for a pest that accounts for much of the $32 billion annual cost caused by subterranean termites worldwide.

“The good news for a homeowner is that as soon as the colony is weakened by baits, the neighboring colony would immediately invade its tunneling system, discover the baits and consume them,” said UF/IFAS entomology professor Nan-Yao Su, co-author of the study. “This always results in the elimination of the invading colony. The results showed that as long as the baits are still present in the bait stations, they will continue to intercept and eliminate incoming colonies.”

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‘Gloom’ and doom when these insects are on hot, dry red maple trees

Topic(s): Economics, Entomology and Nematology, Environment, Extension, Forestry, Green Living, IFAS, Landscaping, Pests, Research

GAINESVILLE, Fla. — They are known as gloomy scales, and these insects can make a red maple tree’s life downright dreary. This is because the arthropods feed and thrive on them, especially in warm and dry urban landscapes, a University of Florida Institute of Food and Agricultural Sciences researcher says.

Melanaspis tenebricosa, or gloomy scale insects, reproduce more, especially when the trees they live on are under the stress of heat and drought, according to new study led by UF/IFAS entomology assistant professor Adam Dale.

Dale’s new research is important as residents and urban landscapers decide when and where to plant red maple trees, which are native and widely distributed in North America from Florida to Canada and whose canopy helps cool urban areas.

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Repellant could keep dangerous beetles away from avocado trees

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

Redbay ambrosia beetles.

GAINESVILLE, Fla. — Using some pleasant-smelling chemicals, avocado growers may soon be able to repel beetles that inject a potentially deadly fungus into their trees, saving fruit and money, University of Florida Institute of Food and Agricultural Sciences researchers say.

When they’re infected with the laurel wilt fungus, redbay trees – a close cousin to the avocado — emit methyl salicylate to repel redbay ambrosia beetles, the very beetles that gave the trees the fungus in the first place, scientists say in a newly published study.

Florida avocados bring a $100 million-a-year impact to Florida’s economy, UF/IFAS economists say. They grow almost entirely in southern Miami-Dade County, but growers have battled the laurel wilt fungus, which can kill redbay and avocado trees, since it arrived in Georgia in 2003.

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UF/IFAS researchers find potential bugs to eat invasive cogongrass

Topic(s): Biocontrols, Entomology and Nematology, Environment, Forestry, Invasive Species, Pests, Research

Please see caption below story.

GAINESVILLE, Fla. — A few bugs may be able to chew up some cogongrass, a noxious weed that elbows out pasture grass, golf course greens and valuable ecosystems, a University of Florida Institute of Food and Agricultural Sciences researcher says.

A worldwide research team led by UF/IFAS entomology professor James Cuda and retired entomology professor Bill Overholt found species in Japan, East Africa and Indonesia that might help in the battle against cogongrass.

Among the arthropods they found, Cuda and his team discovered a midge from Indonesia that attacks cogongrass. Cuda and his team are focusing on the Orseolia javanica midge that causes cogongrass to produce linear galls at the expense of leaves. However, when scientists brought the arthropods back to the quarantine facility at the UF/IFAS Indian River Research and Education Center in Fort Pierce, Florida, they did not mate and increase in population.

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UF/IFAS entomologist gets $200,000 to help develop rapid Zika detection

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

Please see caption below story.

GAINESVILLE, Fla. — A University of Florida Institute of Food and Agricultural Sciences entomologist will use a $200,000 grant from the Florida Department of Health to improve tests for the detection of Zika virus.

In 2016, Florida saw 1,272 cases of Zika, which is usually associated with mild symptoms, although severe symptoms may also occur, including Guillain-Barré syndrome and birth defects in babies, according to the U.S. Centers for Disease Control and Prevention. Of those, 256 were locally acquired. So far this year, four more cases have been reported, all travel-related.

Barry Alto, a UF/IFAS assistant professor of medical entomology, said scientists need better diagnostic tools to detect Zika virus to meet challenges to public health. He is working with collaborator Steven Benner at Firebird Biomolecular Sciences LLC to develop methods they hope should take about an hour – far less time than current testing methods. Existing methods require specialized equipment and highly trained personnel, so samples must be transported to specialized laboratory facilities to perform the tests.

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UF/IFAS faculty lead contest that connects insects, art

Topic(s): Announcements, Entomology and Nematology, Environment, Extension, IFAS

Video available at: http://bit.ly/2jveL0r

GAINESVILLE, Fla. — Insects and art intersect in a unique campus-wide sculpture and animation contest organized by University of Florida Institute of Food and Agricultural Sciences entomologists.

In a project called “Insects Alive,” Andrea Lucky and Lisa Taylor hope to use science and technology to inspire creativity in students across UF.

An interdisciplinary team of undergraduate students from across UF is helping to lead the contest. The team generates 3-D files — based on real ants and spiders — that are produced using a nano-CT scanner at the UF Nanoscale Research Facility. The 3-D images are available to all contest participants to use as the basis for art.

For the contest, UF students in any discipline use the 3-D files of the insects and spiders to create three-dimensional sculpture and animation.

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UF/IFAS researchers find 2 virus-carrying mosquito species; 9 new ones in a decade

Topic(s): Entomology and Nematology, IFAS, RECs, Research

GAINESVILLE, Fla. — A University of Florida Institute of Food and Agricultural Sciences entomologist has found two more non-native mosquito species in Florida that transmit viruses that cause disease in humans and wildlife. That makes nine new mosquito species found in Florida in the past decade.

“The presence of any exotic mosquito is important from a nuisance, or biting, standpoint,” said Nathan Burkett-Cadena, a UF/IFAS assistant professor of entomology at the UF/IFAS Florida Medical Entomology Laboratory in Vero Beach, Florida. “However, these two species are known to transmit pathogens that affect human and animal health.”

Burkett-Cadena found the mosquito species Aedeomyia squamipennis and Culex panocossa in Florida City and Homestead, both in south Miami-Dade County. He and Erik Blosser, a post-doctoral researcher at the FMEL, were visiting South Florida to collect a native mosquito species, Culex cedecei, to investigate its biology and ecology, when they noticed the two non-native species.

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UF receives mosquito traps for graduate and family housing

Topic(s): Announcements, Entomology and Nematology, Families and Consumers, IFAS, Pests

 

Paul Choi from Seoul Viosys meets with Dr. Philip Koehler and University Vilage housing workers to donate mosquito traps, photographed on November 21, 2016.

GAINESVILLE, Fla. — The University of Florida Department of Housing and Residence Education will receive traps designed to stop mosquitoes in their tracks through a donation from SEOUL VIOSYS, a South Korean-based company.

While there are no cases of locally transmitted zika virus on the UF campus, Gainesville or Alachua County, Sharon Blansett, assistant to the associate vice president for UF student affairs, welcomes the mosquito traps as a virus-prevention measure for students living in graduate and family housing.

“The Department of Housing and Residence Education is happy to receive the mosquito traps to help further protect residents living in graduate and family housing from mosquitoes that could potentially transmit viruses,” said Blansett, whose duties include managing UF student housing. “We do not have a mosquito problem at UF, but it’s great to know we’re getting more help in our continued efforts to keep students safe.”

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Tropical bed bug reappears after 60-year absence

Topic(s): Entomology and Nematology, Extension, Household Pests, Research

tropical-bed-bug-110916

A tropical bed bug

GAINESVILLE, Fla. — For the first time in 60 years, a tropical bed bug has been confirmed in Florida, and University of Florida Institute of Food and Agricultural Sciences researchers urge the public to send them samples of suspected bed bugs for identification.

For decades, pest control professionals kept common bed bugs mostly at bay with various chemical treatments. Then scientists saw a resurgence of those bugs in the late 1990s and 2000s. The same thing may be happening with the tropical bed bug. It hadn’t been confirmed in Florida since the 1930s and 1940s. In 2015, a family in Brevard County reported tropical bed bugs in their home, said Brittany Campbell, a UF/IFAS doctoral student in entomology.

UF/IFAS scientists confirmed the bug finding, and so far, that’s the only confirmed case in Florida. But researchers think it’s possible they’ll find the bug in other parts of Florida and, in fact, the South because it lives in tropical and sub-tropical climates. Other than its geographic preference, the tropical bed bug is similar to the common bed bug, which is found in all 50 states.

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UF/IFAS researcher hopes to bolster pollinators, reduce water use, other inputs on golf courses

Topic(s): Agriculture, Biocontrols, Conservation, Entomology and Nematology, Environment, Extension, IFAS, Pests, Research

Adam G. Dale at the Mark Bostick Golf Course photographed planting seeds on November 1, 2016.

GAINESVILLE, Fla. — This spring, a handful of golf courses in Florida will become a little more “green,” thanks to a new project led by a University of Florida Institute of Food and Agricultural Sciences Extension specialist and researcher.

“In our state, resource conservation is a big issue, especially water conservation,” said Adam Dale, a UF/IFAS assistant professor of entomology. “Other big issues include pollinator conservation and insect pest management. Both of which are connected to the vitality of our ecosystems.”

According to Dale, golf courses could be used to conserve pollinators while reducing water consumption and management inputs such as pest control.

“Golf courses have a reputation for the resources used to maintain them,” Dale said. “In Florida, the majority of golf course acreage is irrigated, but 40 to 70 percent of that area isn’t typically played. What if we took some of that under-played space and turned it into drought tolerant functional habitats for pollinators and other beneficial insects?”

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