The Mississippi State University Extension plant disease and nematode clinic provides detailed, accurate, and timely analyses of soil and plant samples.
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.
ALT A flyer showing the cover for the book Wild Work, Adventures of Women Field Biologists. Photos of the author and 3 discussion panelists. Hosted by Delta Scholars in Thompson Hall Annex 100 (Tully auditorium) on the campus of Mississippi State University on Monday, November 16, 2026 from 2:00-3:00 pm.
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
ALT A hand clad in a blue nitrile glove holds a 4-inch cup cutter plug of bermudagrass over a white basin filled with sand that is sitting atop a red tray. Roots hang down several inches below the plug.
ALT A microscopic sideview of a mealybug showing legs and mouthparts.
ALT A magnified view of a bermudagrass plant showing pink mealy bugs concentrated under the leaf sheath with a white powdery coating on some of the nearby leaf surfaces.
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
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
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
ALT A bermudagrass variety turf trial showing a field with blocks of green grass surrounded by lanes of brown grass. A white sign on a short woodend stake in the foreground identifies the cultivar of grass as Celebration Plus MSU/Sod Solutions
ALT A woman in a gray shirt and tan baseball cap sits at a table, looking up at a man in a blue shirt with a black and gray baseball cap. They are under a white tent. A field of grass is in the background.
ALT Four people pose for a group selfie in a field of grass.
ALT A white tent with a banner attached to the tent poles. The banner header says 2026 Turfgrass research field day sponsors and is printed in white font on a maroon background. The logos of various commercial sponsors of the field day are shown on white background.
A fresh and beautiful specimen of Laetiporus cincinnatus, probably rotting oak roots beneath the soil surface on Scattertown Trail in the Noxubee Wildlife Refuge.
#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
ALT A green bermudagrass lawn with brown blighted areas that are about 5cm in diameter. A black ruler in the center of the photo provides a size reference.
ALT A close up of a clump of zoysia grass. The green leaf blades are covered in tan spots with dark reddish-brown borders typical of the disease dollar spot.
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
ALT A circular green spore print from a gilled mushroom on a white background.
ALT White mushrooms with tan circles in the centers of their caps warts scattered across the cap surface. The mushrooms are growing in a green bermuda grass lawn. Behind the mushrooms is a circle of brown hardwood mulch surrounding the base of a 3 to 31/2 inch tree trunk.
ALT A mushroom laying on its side on top of a green bermudagrass lawn. The bottom of the mushroom stem is covered in brown soil. The exposed gills of the mushroom are a dingy white. The black handle of a pocket knife is next to the mushroom.
#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
ALT Watermelon cultivar Royal Golden growing in the field on black plastic. Leaves have bright yellow spots with brown centers from infection with the anthracnose fungus.
ALT Watermelon leaves on a red tray. Leaves have brown leaf spots from infection by the anthracnose fungus. There is some faint yellowing associated with the leaf spots.
ALT Spindle shaped brown lesions on a green watermelon vine. A black ruler is in the background. The lesions are caused by the anthracnose fungus.
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
ALT A green pepper leaf with yellow flecks or black spots surrounded by yellow halos. on a white background adjacent to a gray ruler.
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
ALT Stolons of St. Augustine grass on a red tray with a black ruler. Leaves are bright green with gray leaf spots surrounded by red borders. Roots are stunted and have swollen root tips. Black lesions are present on the yellow stolons.
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
ALT Microscopic image showing orange cane tissue with black fungal fruiting structures called pycnidia on the edge of the tissue. Fungal spores that are stained blue are releasing from the broken pycnidia.
ALT Microscopic image showing orange cane tissue with black fungal fruiting structures called pycnidia on the edge of the tissue. Fungal spores of Botryosphaeria dothidea that are stained blue are releasing from the broken pycnidia.
ALT 40x magnification of spores of the fungus Botryosphaeria dothidea that have been stained blue.
ALT Excised pieces of a blackberry cane sitting on a red tray. The cane on the left has an orange canker, caused by the fungus Botryosphaeria dothidea, running up 80% of the length of the cane. To the right of the orange cane is a black ruler with color reference markings. To the right of the ruler is a small section of cane that is dark brown and has splits in epidermis.
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
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
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
ALT Peggy Martin climbing roses on a trellis. Numerous pink blooms interspersed with green foliage. Small brown fungal leaf spots surrounded by purple borders on some leaves.
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…
ALT The crown of a St. Augustinegrass plant attached to a green stolong. The crown has a water-soaked, necrotic lesion at the base of the leaf sheath with strands of brown fungal mycelium of Rhizoctonia solani growing on it. Roots are attached to the stolon and are white and healthy looking.
ALT Golden brown hyphae of Rhizoctonia solani shown at 20x magnification under a microscope. The hyphae branch at right angles and have strong septations.
ALT A green lawn with large circles of beige grass due to infection by the large patch fungus Rhizoctonia solani. The grass in the centers of the circles is green or starting to turn beige.
ALT A crown of a grass plant showing brown strands of Rhizoctonia solani branching at right angles on a necrotic leaf sheath.
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
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
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
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
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
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
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
ALT Microscopic view of an ascomycete fungus on a pine needle. Shown are bitunicate asci containing long, filamentous spores. Bitunicate asci appear as a sac within a sac.
ALT A magnified view of a brown section on a green pine needle. Apothecia of the Lophodermium fungus appear in the brown section of the needle as black, elongated slits that have split open down their centers to reveal a creamy white spore mass within.
ALT Loblolly pine needles showing brown needle tips and small yellow or brown spots on green needle tissue.
ALT A landscape view of a loblolly pine stand along a forest access road. Pine needles in the lower half of the tree canopy are brown because of fungal needle blight.
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
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
ALT Flat, round, pinkish white armored scale insects on the surface of a bermudagrass rhizome under peeled back leaves in the leaf sheath.
ALT Oval, pinkish-white adult bermudagrass scale insect on a metric ruler. The scale insect measures about 1.5 millimeters.
ALT Yellowing and brown pile of bermudagrass in a plastic tray.
ALT Long rhizomes of yellowing and brown bermudagrass on a cutting board.
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
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
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
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
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
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
ALT Gray caterpillar with black triangles on each segment tightly curled up in an outstretched hand. Green leaves with holes eaten in them.
ALT Outstretched green caterpillar showing its belly and legs. A brown stripe runs down its side.
ALT Brownish-green caterpillar with tan stripes on its back.
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
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
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
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
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
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
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
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
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
ALT Green maple leaves with brown spots.
ALT Green water oak leaves with pinpoint brown dots surrounded by a yellow halo, and brown curled leaf tips.
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
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