The Mississippi State University Extension plant disease and nematode clinic provides detailed, accurate, and timely analyses of soil and plant samples.

Mississippi, USA
Hey Mississippi, here’s an event for those interested in wildlife and habitat conservation and biology. The author will discuss her book adamsecology.net/wildwork/ with some of our wildlife and forestry faculty at Mississippi State University.
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Do your bermuda greens have gorgeous roots but still look drought-stressed? It may be an insect problem. #Mealybugs are sap-sucking insects that settle down at the base of the plant and secrete a white waxy (looks powdery) coating over their 2mm long pinkish bodies. #MSUext
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Spent the afternoon in the Delta with Dr. Kristy McAndrew’s lab looking at some stands of ash. Prolonged drought stress is taking a toll on a wide variety trees in this region of the state and is predisposing them to insect and disease problems. #MSUext
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It’s parsley worm time! Every year I delight in sharing my parsley with the beautiful caterpillars that will become black swallowtail butterflies. They are voracious feeders, but the plants will recover. #MSUext
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Another fabulous field day hosted by Dr. Jay McCurdy and the turf research team! Had a great time meeting with clients and catching up with our retired turf pathologist, Dr. Maria Tomaso-Peterson, and Mr. Wayne Philly, turf breeder extraordinaire! #MSUext @MSTurfgrass
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A fresh and beautiful specimen of Laetiporus cincinnatus, probably rotting oak roots beneath the soil surface on Scattertown Trail in the Noxubee Wildlife Refuge.
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#DollarSpot is active in Mississippi. The fungus blights leaves, causing brown spots in the lawn that are about the size of a half-dollar coin (remember those?). Spots on leaves are distinctive: tan with a dark red/brown margin. Learn more: extension.msstate.edu/public… #MSUext
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Calls about mushrooms are picking up with the rainy weather. The false parasol mushroom seen here is a common fairy ring fungus popping up in lawns. The spores are a pretty green, which is how you'll feel if you eat this mushroom. Safe to touch but not to eat. #MSUext
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#Watermelon anthracnose is a common disease in humid climates (i.e. Mississippi!). The leaf spots on the 'Royal Golden' plant in the field have bright yellow borders compared to other cultivars. Lesions also can form on vines. Some cultivars are resistant to the fungus. #MSUext
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In the lab today: Bacterial spot caused by Xanthomonas infects pepper and tomato leaves and fruit. The rainy weather we are experiencing this weekend is perfect for spreading this disease. Don't save seed from infected plants. Learn more extension.msstate.edu/public… #MSUext
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As shown here, St. Augustinegrass stressed by herbicide applications is more susceptible to diseases like gray leaf spot and take-all root rot. The new roots on these plants are stunted with clubbed root tips, making the grass vulnerable to drought and nutrient stress. #MSUext
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Botryosphaeria cane canker is a devasting disease on thornless #blackberry, reducing fruit yields and killing canes. The orange to reddish-brown canker contains black, pimple-like fruiting structures of the fungus. Thorny blackberries are not seriously affected. #MSUext
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Dewberries are ready, Mississippi! A great opportunity to get some fresh air, exercise, and a tasty snack! Worth every chigger bite!! #MSUext
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A few Sunday ‘shrooms celebrating the break in our drought.
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Our native blue flag irises (Iris virginica) have peaked for the spring and are fading out. Learn more about this beautiful wetland plant at extension.msstate.edu/public… #MSUext
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Brown spot needle blight is hitting loblolly pine this spring in MS. The disease starts in the lower canopy and works its way up. Last year’s needles develop brown spots then turn brown and are cast from the tree, leaving tufts of new needles on the branch tips. #MSUext
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Peggy Martin roses are showing off in Mississippi right now, as is Cercospora leaf spot. For more information on growing roses and combating insect and disease problems, check out extension.msstate.edu/public… #MSUext
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Heads up Mississippi! Large patch is here! The fungus is active in spring and fall. It attacks the crown of the plant, separating it from the root system. Learn more about the disease and how to manage it in Extension publication P3743 extension.msstate.edu/public…
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Good news! 📣 #mscrops FREE #nematode testing has been extended another year for Mississippi #soybean producers! Details are available online extension.msstate.edu/lawn-a… Free testing expires March 31, 2027 #MSUext @MSUExtService @changliunema @baldpathologist
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Hollow stem in broccoli is a physiological disorder. Fast growing varieties are often more likely to develop the problem. Soil moisture, wide plant spacing, high rates of nitrogen or potassium, or a deficiency in boron have been associated with increased incidence. #MSUext
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FREE #nematode testing for Mississippi #soybean producers! Details are available online extension.msstate.edu/lawn-a… Free testing expires March 31, 2026 #MSUext @MSUExtService #mscrops
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A fresh crop of orange mock oyster mushrooms on the trunk of a pine punctuating a beautiful Thanksgiving Day. #MSUext
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Chicken of the woods (Laetiporus sulphureus) causes heart rot in hardwood trees. Bright orange, the fungus is like a flaming beacon in the forest. The sulphur-yellow pore surface and orange top make this an unmistakable find. My first time finding this in MS. #MSUext
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Oyster mushrooms (Pleurotus ostreatus) are prolific right now. Beautiful and delicious decomposers of dead trees and nematodes. The fungus produces a toxin that paralyzes nematodes and is being investigated as a potential biological control of plant parasitic nematodes. #MSUext
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Dyer’s polypore (Phaeolus schweinitzii) breaks down cellulose in wood, causing a brown cubical rot. Commonly rots pine roots in MS. The conk on the trunk of this tree indicates the decay has progressed up into the lower trunk. A great source of yellow dye for textiles. #MSUext
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Headed back to Starkville after a great exchange of research-based information on the brown spot needle blight situation in the Gulf South. Good progress but many questions left to answer. ⁦@ForestHealth_AU⁩ #MSUext
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Hypomyces are fungi that parasitize mushrooms. There is an interesting area in the Sam D Hamilton Noxubee Wildlife Refuge where mushrooms are commonly parasitized. Here is an example showing the uninfected fungus on top left and parasitized versions of the same fungus. #MSUext
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Lophodermium needle blight is having a moment in parts of Mississippi this fall. We've been seeing this fungus on current year's needles that are exhibiting brown tips. Looks similar to brown spot needle blight which we frequently see in the spring on second year needles. #MSUext
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One of the signs of fall is Cercospora leaf spot on #watermelon. Fall weather is more generally more conducive to disease development. Spring planting, good sanitation practices, and a preventive fungicide program can help reduce disease severity. #MSUext
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Don't forget about insects when trying to figure out turf decline problems. #Bermudagrass scale is tiny and hides deep in the leaf sheath, making it hard to spot. Thatch protects the scale, so look for this pest on areas that are in the thatch layer. #MSUext
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Encountered these Amanitas on the side of the road yesterday. Looks like someone had a rough day at school. 😉
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Lots of galls on display today. Spindle-shaped galls are characteristic of fusiform rust on loblolly pine. Gouty oak gall is caused by a very tiny wasp. Soft, pinkish galls on the leaves of bald cypress are caused by a tiny insect called the cypress twig gall midge. #MSUext
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American beautyberry leaves exhibiting yellow mottling and a little distortion, symptoms that may be due to cucumber mosaic virus which is transmitted by aphids. The virus is incurable but infected beautyberry bushes can survive for years. #MSUext
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My container garden is hosting some beautiful “pests” tonight. A differential grasshopper, brown with black chevrons on its legs devouring eggplant leaves. Black swallowtail caterpillars with green and black stripes accented by bright yellow dots are enjoying the parsley. #MSUext
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Love is letting go. Don't forget to release the guy wires used to stake young trees. Especially when they are no longer attached to a support post! Left in place, the wire or string will girdle the expanding trunk, negatively impacting tree growth and health. #MSUext
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Above ground symptoms of tree decline may be due to dysfunctional roots. Physical deformities, like this pot bound tree are one cause. Break up the root ball of container grown plants before installing them in the landscape and avoid planting them if they look like this. #MSUext
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These yellowstriped armyworms have been enjoying my zinnias and tomatoes (leaves and fruit). If you see signs of feeding, check on the plant during the day while they're feeding, or look for their tightly curled bodies on the soil under the plant in the evening. #MSUext
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Bacterial spot on tomatoes continues to be a problem as daily thunderstorms continue. The pathogen (Xanthomonas spp.) can be seed transmitted, so don't save seed from infected fruit. Warm temperatures, lots of rain and high humidity favor spread. extension.msstate.edu/public… #MSUext
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Stem fasciation on wisteria. Fasciation occurs when the growing point of the stem (or sometimes a flower) produces flattened, ribbon like tissue. Harmless to the plant and can be pruned out. There are many potential causes, including genetic, environmental, and disease. #MSUext
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Blossom end rot is especially problematic in container-grown tomatoes because of difficulty keeping the soil moist. When water is limited, calcium (used to strengthen cell walls) can’t make it to the developing fruit. A sunken brown spot develops when the cells collapse. #MSUext
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It's Dollar Spot time! We see it in bermuda and zoysia lawns that might need a hit of fertilizer. Read all about it extension.msstate.edu/public…
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Enjoyed being the quarterly nature series speaker for the Friends of Noxubee Refuge group this evening and celebrating the 85th anniversary of the Sam D. Hamilton Noxubee Wildlife Refuge! #MSUext
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Wedge-shaped areas of dark wood in a stem cross section are often indicative of canker pathogens like Botyrosphaeria and Phomopsis. Look for black pustules embedded in the bark. This tree was under severe root stress and the canker disease is likely secondary. #MSUext
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Lots of rain is making the fungi pop in MS! Wrinkled, tan jelly babies (Leotia lubrica) stain green when bruised. White clumps of false coral (Tremellodendron sp.) are jelly fungi,not the corals they resemble. Pretty little stalked scarlet caps decompose dead wood. #MSUext
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Chanterelles are up Mississippi! These young “smooth chanterelles” (Cantharellus lateritius) are characterized by their orange color, in curved margin, and a very smooth fertile surface. The cap will become more funnel-shaped with age. #MSUext
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Mayapple rust is striking, with angular yellow spots on the upper surface of the leaf. Spores are produced on the underside of the leaf. This leaf has brown telial pustules. A different spore stage is orange and powdery. Mayapple is the only plant this fungus infects. #MSUext
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Fungal leaf diseases cause a great deal of alarm in the spring, especially when new leaves appear deformed or fall off. Don't fret - or spray! Damaged leaves will often drop and new leaves will be unaffected because the weather will no longer be conducive to infection. #MSUext
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Found this lovely crop of Lentinus crinitus (hairy capped Lentinus) in the Sam D. Hamilton Noxubee Wildlife Refuge today. One of our Gulf Coast gems, this fungus grows on dead hardwoods. This is a really tough fungus and the cap and stem are covered in dense hairs. #MSUext
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Mississippi blooms for Mother’s Day! Beautiful native blue flag iris with purple petals with a central yellow stripe, a spiky white and yellow bloom of a pond lily, and the tightly clustered pink tinged white flowers of our native redring milkweed. #MSUext
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