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Mandy Bish

@MandyBish1

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Assistant Professor & Extension Field Crops Pathologist | Integrated Pest Management Coordinator | Mizzou and UMD Alum

Missouri
Joined March 2014
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@CropNetwork
Crop Protection Network
3 days
Anthracnose is likely the most prevalent stalk rot in the eastern United States. Affected plants have shredded pith and die prematurely. Anthracnose also causes a distinctive blackening of the stalk rind. Initially, these areas are narrow, water-soaked lesions, but they turn
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@MandyBish1
Mandy Bish
10 days
Congratulations to @JeffBarizon for earning a @cafnr Driver to Distinction Award! Jeff was surprised by Dean Daubert & the Division Director Buecking today. Well done, Jeff!
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@CropNetwork
Crop Protection Network
21 days
Ugly ears. Some may contain mycotoxins. Test grain and whole-plant silage for mycotoxins if 10% or more ears have rot. Obtaining a good sample for testing is critical for accurate results. Read more at https://t.co/uLeklcA3Jk. @badgercropdoc @baldpathologist @MartinChilvers1
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@CropNetwork
Crop Protection Network
24 days
The presence of ear rot diseases should be a key consideration when determining harvest timing. Fungi that cause ear rots can continue to grow, spread, and produce mycotoxins after corn reaches maturity and during storage if grain is not dry. Read more at
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@CropNetwork
Crop Protection Network
1 month
If corn ear rots are a significant problem, it's essential to test grain and silage for mycotoxins. Getting a good sample is critical. Find out how at Extension's https://t.co/uLeklcA3Jk. From @badgercropdoc @baldpathologist @MartinChilvers1 @travisfaske @dsmuelle @ppp_trey
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@CropNetwork
Crop Protection Network
1 month
Scouting is similar for all corn ear rots. Starting at late dent stage (R5), choose 20 ears from 5 areas in the field. Pull back the husk to see the entire ear. It's critical to identify ear rots in the field as several ear rot fungi produce mycotoxins, which can harm livestock
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@CropNetwork
Crop Protection Network
1 month
Severe foliar disease can weaken corn stalks. Test stalks using the pinch test and prioritize harvest for that field if 10 percent or more stalk rot. Ask local Extension for more info. @alisonrISU @DTelenko @MandyBish1 @maddishires @MartinChilvers1 @badgercropdoc @tjcksn
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@CropNetwork
Crop Protection Network
2 months
Stalk rots cost farmers $4.2 billion in the past five years. Test stalk integrity using the pinch test 40-60 days after pollination. Prioritize harvest for a field if 10%+ stalk rot. Ask local Extension for more info. @alisonrISU @DTelenko @MandyBish1 @maddishires
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@CropNetwork
Crop Protection Network
2 months
Scouting is similar for all corn ear rots. Starting at late dent stage (R5), choose 20 ears from five areas in the field. Pull back the husk to see the entire ear. It's critical to identify ear rots in the field as many ear rot fungi produce mycotoxins, which can harm livestock
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@MandyBish1
Mandy Bish
2 months
Congrats to @Mizzou PhD student @JeffBarizon on publishing his research! Jeff evaluated whether SCN virulence phenotypes influenced the effectiveness of seed treatments. @MizzouIPM @cafnr @missourisoybean https://t.co/fTeaJbxaec
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reference-global.com
Soybean cyst nematode (SCN; Heterodera glycines) is a major pathogen of soybean (Glycine max) in North America....
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@CropNetwork
Crop Protection Network
2 months
Corn disease took 6% of every acre in 2024. Scout now to plan for future seasons.
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@MizzouIPM
Mizzou IPM
2 months
Red Crown Rot of Soybean was found in new Missouri counties this week. Look closely at those “SDS” plants: https://t.co/0orzOjq3YO @muextension, @MUExtAgEnviron, @cafnr, @MandyBish1, @missourisoybean
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@CropNetwork
Crop Protection Network
2 months
“Cercospora leaf blight...is an important soybean disease, particularly in the southern United States. This foliar disease can cause premature defoliation and yield loss...As the disease progresses, the upper canopy...will develop a bronze to purple coloration, and the leaves
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@CropNetwork
Crop Protection Network
3 months
Diplodia ear rot has been found in multiple states in 2025. No mycotoxins are associated with this ear rot in the US and Canada. Ear leaves generally die prematurely on infected ears. Scout prior to maturity to ID. Problematic areas should be harvested as soon as possible to
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@CropNetwork
Crop Protection Network
3 months
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@CropNetwork
Crop Protection Network
3 months
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@CropNetwork
Crop Protection Network
3 months
“Integrating several [white mold] management practices including cultural control, varietal resistance, scouting, prediction tools, and chemical and biological control can form an effective management plan for white mold.” From the White Mold of Soybean web book at
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@CropNetwork
Crop Protection Network
3 months
Southern rust, tar spot & gray leaf spot = fungi. Bacterial leaf streak & Goss's wilt = bacteria. Properly ID & assess risk for best disease management outcomes. Ask local Extension for more info. @DTelenko @alisonrISU @baldpathologist @MahDuffeck @maddishires @MandyBish1
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@CropNetwork
Crop Protection Network
3 months
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