Cottony leak on cucumber. Photo: Rebecca A. Melanson, MSU Extension, Bugwood.org.
Plants in the landscape and garden can seem to go from thriving to struggling overnight. What is causing your plants to wilt, turn yellow, turn brown, or grow spots? Plant disease experts with the MSU Extension Service can help you determine what is happening and how to manage it. Get science-based information about bacterial blights, mold, and fungi direct from our website or from your local Extension agent or specialist!
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.
MSU scientists are on the lookout for a cucurbit crop bandit. And they need your help!
Cucurbit downy mildew is a sneaky thief with the ability to quickly and significantly reduce yields or wipe out entire crops of susceptible cucurbits, including cucumbers, melons, pumpkins and squash. (File photo by Rebecca A. Melanson)