Martin Chilvers
@MartinChilvers1
Field crop pathologist at Michigan State University, with interests in fungal and oomycete biology and genetics YouTube @ MSU Field Crops Pathology
@CropNetwork Southern corn leaf blight developing on lower leaves in South AL. The disease is caused by the fungus Bipolaris maydis. Lesions are tan, somewhat rectangular & have reddish-brown margins. Resistant hybrids & foliar fungicides are available for control #Corn #Alabama
“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…
Still not confirmed in MI, but one to keep an eye out for
Goss's wilt bacteria can infect corn at any stage. Lesions are long, gray-green to black, water-soaked, and have wavy edges. Streaks resembling freckles in lesions are a distinctive symptom. Resistant hybrids are available. Crop rotation and tillage reduce bacterial survival.…
Both southern rust and tar spot corn leaf samples have been confirmed by the Purdue PPDL today. Please continue to keep scouting as both diseases continue to be found. (reminder we need the actual leaf to confirm) @PurdueCorn @PurdueExtension
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…
Fusarium head blight (FHB) reduces wheat yield and quality and can result in toxin contaminated grain. A properly adjusted combine can help reduce scabby kernels in harvested grain. Combine fan speed adjustment can help remove moldy and lightweight kernels and reduce toxin…
Bacterial leaf streak appears as narrow leaf lesions with wavy-edges between corn leaf veins. It can be confused with gray leaf spot. Fungicides are not effective for managing bacterial leaf streak. Read more at cropprotectionnetwork.org/publications/b…. @alisonrISU @tjcksn @baldpathologist…
Crop Outlook tracks more than just tar spot and southern rust. Check out specific issues ranging from white mold of soybean to stripe rust of wheat at cropprotectionnetwork.org/crop-lookout. #corn #soybeans @GetRidOfWeeds @TheSCNCoalition @TakeActionHRM @SoybeanScience1 @NationalCorn…
Southern rust of corn ID and management at cropprotectionnetwork.org/publications/a…. Ask local Extension for more info. @DTelenko @BorisCamiletti @maddishires @tjcksn @alabamaED @travisfaske @baldpathologist @bobkemerait @DaisyHAhumada @YuanZeng3 @OnofreLab @MahDuffeck @badgercropdoc…
Gray leaf spot of corn occurs virtually every growing season and is often more severe in corn following corn. Disease is favored by warm (80s°F), humid (>90% for 12+ hours) weather. Severity depends on hybrid susceptibility and environment. Resistant hybrids are available. Crop…
These are not tar spot. For tar spot prediction data near your farm, check out the Forecasting Tool at cropprotectionnetwork.org/crop-disease-f…. @badgercropdoc @MartinChilvers1 @tjcksn @baldpathologist @bobkemerait @alisonrISU @MandyBish1 @maddishires @NDSUExtension @DTelenko @OnofreLab…
Southern rust confirmed today on corn in Crittenden County, KY. Depending on growth stage, corn may need a fungicide application. Check the @CropNetwork map to track disease and determine if an application is needed! cropprotectionnetwork.org/maps/southern-… @UKAgriculture @UKExtension
Check out the Fungicide ROI Calculator for White Mold of Soybean from Extension at cropprotectionnetwork.org/white-mold-roi…. @BisonBeanDoc @badgercropdoc @DTelenko @dsmuelle @MartinChilvers1 @hoperbecton @datascience_uw @CFAES_OSU +others @SoyResearchInfo @SoybeanScience1 @WISoyCheckoff…
“Managing [Cercospora leaf blight] mainly relies on using foliar fungicides from multiple fungicide classes, and applying them at appropriate reproductive growth stages.” From the article An Overview of Cercospora Leaf Blight at cropprotectionnetwork.org/publications/a… by @ppp_trey…
True for tar spot too!!!!
The southern rust map cropprotectionnetwork.org/maps/southern-… is NOT a "spray advisory" map. Follow the spread of the disease, determine corn growth stage, scout your crop, make a decision to apply a fungicide on budget, ROI, growth stage, presence of southern rust #mscrops @MississippiCorn
.@MSU_PSM preparing for #redcrownrot findings. Hear more on what to look for in our interview with @MSUExtension @MSUEFieldCrops @MartinChilvers1 @brownfield #agnews brownfieldagnews.com/news/msu-prepa…
If northern corn leaf blight is present in the canopy before and just after tasseling (VT), and conditions are favorable for disease, significant yield losses can occur in susceptible hybrids. Get ID and management info for northern corn leaf blight at cropprotectionnetwork.org/publications/a….…
“Effective management of soybean stem diseases starts with proper identification. Symptoms typically appear in the mid to late reproductive stages of soybean.” From the Scouting for Soybean Stem Diseases publication at cropprotectionnetwork.org/publications/s… by @cropdoc08 @baldpathologist…
#Tarspot reports expanding this week. Hear more about the health of the current #corn crop in our interview with @MSU_PSM @MSUEFieldCrops @MartinChilvers1 @brownfield #agnews #grow25 brownfieldagnews.com/news/tar-spot-…
Crop Lookout is an interactive map showing emerging field crop issues in the U.S. & Canada. Updated by Extension, this map shows reports of diseases, pests, & other agronomic challenges. Check out Crop Lookout at cropprotectionnetwork.org/crop-lookout @DTelenko @alabamaED @baldpathologist…