Extension/Research Professor and Plant Pathologist with Mississippi State University at the DREC - corn, cotton, grain sorghum, rice, soybean, and wheat
Stoneville, MS
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- Following 1,186
- Followers 5,436
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Tom Allen retweeted
Fusarium stalk rot causes shredded pith that may be tan to light pink. Brown streaks may be observed on the lower internodes.
The fungi overwinter in corn residue, other dead plant residue, and in corn seed.
Resistance to Fusarium stalk rot is available. Rotation and tillage will reduce inoculum.
@DTelenko @badgercropdoc @MandyBish1 @MartinChilvers1 @maddishires @alisonrISU @baldpathologist @alabamaED @travisfaske @ppp_trey @cropdoc08 #corn
ALT Illustration of the Fusarium stalk rot disease cycle demonstrating how the fungus overwinters in corn residue, is spread and infects the plant, and develops within the plant.
ALT Split corn stalk showing degraded pith tissue and pink mold.
ALT Three split stalks on a blue background showing pith that has rotted.
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Tom Allen retweeted
Cover crop seed doesn’t have to be confusing. There are basically three types of species that serve various roles.
✔️Cereal grains stabilize soil
✔️ Legumes fix nitrogen
✔️ Brassicas produce tubers
A key is to use a suitable legume. Berseem or Persian clover thrive in wet soil.
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Tom Allen retweeted
Following severe August flooding in parts of Indiana, ear rots and mycotoxin risk are important considerations as harvest gets underway.🌽
Read the latest from Camila Nicolli & Dan Quinn:
🔗ag.purdue.edu/news/departmen…
@INCornFarmers
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Tom Allen retweeted
Check out Scouting for Soybean Seed Diseases from Extension at doi.org/10.31274/cpn-2019062….
@AlbertTenuta @cropdisease @MartinChilvers1 @febina_m @dsmuelle @badgercropdoc @cropdoc08 +others @maddishires @MandyBish1 @DylanMangel @BisonBeanDoc @baldpathologist @alabamaED @travisfaske @MahDuffeck @DTelenko #harvest26 #soybean #seed #USSoy
ALT Soybean pod split open to reveal purple discoloration on soybean seeds.
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Tom Allen retweeted
Areas of the north Delta corn crop were due after being wrecked by greensnap last year, and it definitely came through.
This outstanding hybrid plot was grown with irrigation by David Taylor near Sledge.
Thanks to David, eight participating seed companies and all involved. 🌽
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Tom Allen retweeted
Delayed soybean harvest during a wet fall can increase risk of seed issues. These images are from a field in central Iowa on September 24, 2026. #soybean #harvest26
ALT Soybean seeds in a pod with purple discoloration and seed coat cracking.
ALT Soybean seeds in a pod with white fungal growth and decay.
ALT Soybean seeds in a pod with fungal growth, discoloration, and seed coat cracking.
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Tom Allen retweeted
“Low Diversity of Isolates of Calonectria ilicicola, the Causal Agent of Red Crown Rot of Soybean, Detected Across Illinois,” by Steven J. Clough et al. Learn more: doi.org/10.1094/PDIS-07-25-1…
ALT Fig. 1. Examples of red crown rot (RCR) disease symptoms and signs of the pathogen (Calonectria ilicicola) on soybean at a field in our Illinois surveys.
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Tom Allen retweeted
"Delaying harvest increases the risk of pod and stem blight, because plants are likely to be exposed to cool and wet conditions that favor disease development. Thus, timely harvest will help reduce the risk of seed decay and preserve seed quality..."
From An Overview of Pod and Stem Blight and Diaporthe Seed Decay doi.org/10.31274/cpn-2019062… by @dsmuelle @cropdisease @MartinChilvers1 @febina_m @AlbertTenuta @cropdoc08 +more
@DylanMangel @BisonBeanDoc @baldpathologist @maddishires @MandyBish1 #soybean #SeedAudio #USSoy
ALT Soybean seed showing fungal growth and discoloration inside a split pod.
ALT Section of soybean stem with linear rows of dark fungal growth.
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Tom Allen retweeted
We are keeping out an eye as well here in Indiana. Send samples to our Purdue Plant Pest and Diagnostic Lab.
Emerging leaf spot disease of corn under investigation in Michigan. Please keep an eye open for this leaf spot in corn and send a sample in to help with diagnosis @MSUDiagnostics @MSUExtension @MSU_PSM @MI_Corn @CropNetwork canr.msu.edu/news/emerging-l…
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Tom Allen retweeted
Corn stalk rots cost farmers $4.2 billion in the past five years.
Test stalk integrity using the pinch test. Prioritize harvest for a field if 10%+ stalks are rotted.
@alisonrISU @DTelenko @MandyBish1 @maddishires @MartinChilvers1 @badgercropdoc @baldpathologist @cropdoc08 #corn @NDSUExtension @travisfaske @ppp_trey
ALT Corn stalk pinched by a hand.
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Tom Allen retweeted
It is a bit ironic that our most productive plots were often in dryland fields. Excessive moisture can be stressful also.
This fantastic corn hybrid plot was grown near Como by David Taylor.
Thanks to David, Brent, eight participating seed companies and all involved.
🌽
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Tom Allen retweeted
There are five major mycotoxins associated with ear rots. Toxic effects vary by type, concentration, exposure, and animal species.
If a field has kernel or ear rot problems (10%+ of ears are moldy), test for mycotoxins.
For more info, see Corn Mycotoxin FAQs at cropprotectionnetwork.org/pu….
From Extension. @badgercropdoc @baldpathologist @MartinChilvers1 @travisfaske @dsmuelle @ppp_trey @AlbertTenuta @cropdoc08 @DaisyHAhumada @MandyBish1 @PACropDoc @MahDuffeck @alisonrISU @DTelenko
@croptoxcare #harvest26 #corn
ALT Pink mold on corn ear.
ALT Green mold on corn ear.
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Tom Allen retweeted
Harvested peanut trial at Plant Science Unit. For this @PeanutFarmers regional project, we are testing biological and conventional nematicides as well as a resistant cultivar against peanut root-knot nematode. 1 of 2 locations.
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Tom Allen retweeted
Dryland corn produced well in central Mississippi this summer.
These corn hybrid plots were grown near Edwards by Danny Mashburn, and at the Brown Loam Experiment Station by Tyler Soignier.
Thanks to Danny, Kyle, Tyler, eight participating seed companies and all involved.
🌽
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Tom Allen retweeted
Five major mycotoxins are associated with corn ear rots. If fields had >10% moldy ears, test for mycotoxins.
Read more in Extension's cropprotectionnetwork.org/pu…
@badgercropdoc @baldpathologist @travisfaske @MartinChilvers1 @ppp_trey @AlbertTenuta @MahDuffeck @PACropDoc @alisonrISU @MandyBish1 @cropdoc08 @AlbertTenuta @LSUAgCenter @croptoxcare
ALT When crushed corn kernels are exposed to a black light, they can glow if kojic acid is present. Two piles of corn are shown. Each pile is shown under regular light and under black blight. In one the pile with kojic acid, it is shown glowing under the black light.
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Tom Allen retweeted
Fusarium root, crown and foot rot is widespread and can be found in all wheat production regions of the U.S. and Canada. Seedling blight occurs when Fusarium-infected seed is sown. Infected seedlings tend to be reddish with poor vigor and poor tiller production.
Planting into a prepared seedbed with available moisture will reduce stress and disease risk. Depending on the causal Fusarium species, an extended rotation away from a small grain crops reduces risk. Fungicide seed treatments can be used for early season protection against seedling blight and root rot.
@NDSUExtension @StrayerScherer @travisfaske @BorisCamiletti @DTelenko @KelseyFAndersen @cropdisease @ppp_trey @MartinChilvers1 @OSUwheatdisease @AlbertTenuta @maddishires @badgercropdoc @thppdd_lab @OhioCornWheat @WheatInnovation @WheatPete #wheat
ALT A dark brown to red lesion near the first node of a wheat plant.
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Corn can get charcoal rot too. However, in this particular situation I think it’s a secondary issue given we had such a hot year, irrigation was difficult to time, and the soil class in the areas with charcoal rot appears to be lighter than the rest of the field #secondary
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Some good frogeye leaf spot evaluation data from the MSU soybean OVT in NW MS this afternoon. The photo on the right was two MG V varieties right next to one another….bottom leaflet appears rather resistant while the top leaflet appears rather susceptible @MSSOY
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