News Filed Under Plant Diseases
CRYSTAL SPRINGS, Miss. -- When impatiens planted as part of a Mississippi State University variety trial died within two weeks, researchers acted quickly and described a pathogen never before seen in this flower.
"We were growing SunPatiens, which are hybrid impatiens immune to downy mildew. This disease has been a big problem for the industry," Broderick said. "The plants were doing really well, but in July they started to look like they were wilting. The stems were collapsing and dying, and in a two-week period, they went from looking relatively healthy to dead."
STARKVILLE, Miss. -- Farmers know how to handle ongoing threats posed by insects, diseases, and weeds, but new threats continue to surface that keep them on high alert and change the way they operate.
Mississippi Agricultural and Forestry Experiment Station researchers and MSU Extension Service specialists work to monitor the arrival of new crop threats, determine the best way to address the problem, and pass on those recommendations to producers.
Insect pests …
STARKVILLE, Miss. -- Mississippi State University experts found an invasive insect that attacks crape myrtles on the coast this spring and now have spotted the pest in two cities on opposite ends of the state.
The insects are crape myrtle bark scale, or CMBS, and they were found March 15 in Ocean Springs in Jackson County. In August, the insects were detected at five locations in Olive Branch and Southaven in DeSoto County.
RAYMOND, Miss. -- Rebecca Melanson recently joined the Mississippi State University Extension Service as a plant pathologist.
She will focus on disease management issues in fruits, vegetables and nuts.
MISSISSIPPI STATE – A statewide survey that Mississippi State University began this summer will continue next year as researchers look for a particular fungal disease that is developing resistance to chemical control.
In 2012, soybean fields in two Mississippi counties were found to have frogeye leaf spot fungi resistant to strobilurins, the class of fungicides commonly used for late-season disease management in soybeans.
MISSISSIPPI STATE – Clarissa Balbalian’s job presents a new mystery every day.
“If you are analytical and like solving mysteries, this is the perfect job,” said Balbalian, the manager of Mississippi State University’s plant diagnostic lab. “I like working with people and helping them find solutions to their problems, too.”
Balbalian studied biology at Longwood University in Virginia, and then earned her master’s degree in forest pathology at West Virginia University.
MISSISSIPPI STATE – Two soil tests conducted routinely help Mississippi producers ensure the productivity of their farmland.
Soil tests in the fall to determine fertility levels and nematode tests in the spring to detect harmful pests help producers improve soil quality before spring tillage and planting begin.
By Dr. Rebekah Ray
MSU Delta Research and Extension Center
STONEVILLE – Mississippi State University scientists are trying to identify soybean varieties resistant to a disease that can reduce yields by more than 20 bushels per acre.
MSU plant pathologist Gabe Sciumbato and research associate Walter Solomon are checking soybean varieties for purple leaf blight through MSU’s soybean variety trials. Both are Mississippi Agricultural and Forestry Experiment Station researchers at MSU’s Delta Research and Extension Center in Stoneville.
MISSISSIPPI STATE – Researchers at Mississippi State University have found a cost-effective and environmentally friendly strategy for fighting one of the most serious soil-borne diseases in poinsettia production.
Pythium stem and root rot is a common problem in poinsettia production because the fungus thrives in cool, saturated and poorly drained soils, said Maria Tomaso-Peterson, associate research professor in MSU’s Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology.
MISSISSIPPI STATE – Researchers at Mississippi State University have developed technology that uses reflected light to analyze the presence of certain nematodes in cotton fields so producers can increase profits.
By Karen Templeton
MSU Ag Communications
MISSISSIPPI STATE – When Auburn University officials needed help investigating an attack on part of their school’s history, they turned to Mississippi State University.
According to an Auburn University statement, school officials learned that a Jan. 27 caller to The Paul Finebaum Show, a nationally syndicated radio show based in Birmingham, claimed he had applied an herbicide to the soil around 130-year-old live oaks at Toomer’s Corner on campus.
MISSISSIPPI STATE – The plant disease diagnostic lab at Mississippi State University handled 726 samples in 2009, and nearly 100 of these were digital images rather than actual samples of diseased plants.
Clarissa Balbalian, diagnostician and lab manager with the MSU Extension Service, said the lab made reasonably confident diagnoses of 75 percent of these digital samples without requiring physical samples.
“That success rate is primarily due to the excellent quality of the photographs and the detailed descriptions that accompanied them,” Balbalian said.
By Rebekah Ray
Delta Research and Extension Center
STONEVILLE -- Black root rot, a fungal disease that infects cotton and soybeans, may be affecting more soybean acres across the Delta, and Mississippi State University researchers are working to prevent its impact.
MISSISSIPPI STATE -- A Noxubee County soybean field severely infected with soybean rust will represent the state's first yield losses to the disease that has been present in the state since November 2004.
Rust was evaluated in the field Sept. 4, and it is the most severe case of soybean rust found in Mississippi to date. The 100-acre field near Brooksville was not treated with a fungicide.
MISSISSIPPI STATE -- Mississippi State University Extension Service specialists are hopeful that incidences of soybean rust across the state will continue to be minor and only occur after plants have passed the at-risk growth stage.
MISSISSIPPI STATE – Soybean rust was found in Mississippi in two fields near Thornton on Thursday, but experts are not recommending producers spray fungicide for the disease.
MISSISSIPPI STATE -- Mississippi soybean growers wrapped up another year's battle with soybean rust without yield losses to the disease, even though it was found in 79 of the state's 82 counties.
Tom Allen, an Extension plant pathologist at Mississippi State University's Delta Research and Extension Center in Stoneville, has been part of the team monitoring the disease since 2007. He announced Nov. 1 that soybean rust had been found in all counties except Hancock, Harrison and Stone counties in south Mississippi.
MISSISSIPPI STATE -- Ongoing efforts to track Asian soybean rust and minimize its threat to Mississippi soybean acres led researchers to note that some kudzu, a rust host, resists the disease.
Billy Moore, plant pathologist emeritus working part time with the rust program for the Mississippi State University Extension Service, said the team searching for rust in the state examines soybeans and kudzu plots for signs of the fungus. They use global positioning system coordinates to note the location of each plot searched for rust.
MISSISSIPPI STATE -- Well before planting time, the fight against Asian soybean rust is already under way in Mississippi as sentinel plots are planted and genetic resistance to the disease is being developed.
Billy Moore, pathologist emeritus working parttime with the rust program for the Mississippi State University Extension Service, said Schillinger Seeds is developing resistance to soybean rust.