Past Alerts

IA Pest Alert: Observations of southern rust on corn continue. Products vary in efficacy.

July 24, 2025

Included links: https://cropprotectionnetwork.org/publications/fungicide-efficacy-for-control-of-corn-diseases and https://cropprotectionnetwork.org/maps/southern-corn-rust

Read More about IA Pest Alert: Observations of southern rust on corn continue. Products vary in efficacy.
IA Pest Alert: There is a great new tool to determine risk of disease in your corn and soybean fields.

July 22, 2025

Link included: https://cropprotectionnetwork.org/crop-disease-forecasting
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: There is a great new tool to determine risk of disease in your corn and soybean fields.
IA Pest Alert: Bacterial leaf streak looks similar to gray leaf spot and is prevalent in some fields this year. Fungicides do NOT work against BLS. Learn how to distinguish these diseases.

July 18, 2025

ICM Blog article: https://crops.extension.iastate.edu/post/bacterial-leaf-streak-abounds-some-fields
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: Bacterial leaf streak looks similar to gray leaf spot and is prevalent in some fields this year. Fungicides do NOT work against BLS. Learn how to distinguish these diseases.
IA Pest Alert: Risk of gray leaf spot is high (100%) across Iowa for the next week, while risk for tar spot is 0 to 5% according to the Crop Disease Forecasting Tool.

July 15, 2025

Link included: https://cropprotectionnetwork.org/crop-disease-forecasting
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: Risk of gray leaf spot is high (100%) across Iowa for the next week, while risk for tar spot is 0 to 5% according to the Crop Disease Forecasting Tool.
IA Event Alert: Register to attend the Corn Borer Field Day before July 16! $25 fee includes lunch.

July 14, 2025

Registration link: https://crops.extension.iastate.edu/event/2025/corn-borer-field-day
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Event Alert: Register to attend the Corn Borer Field Day before July 16! $25 fee includes lunch.
IA Pest Alert: Fall armyworms are showing up in corn fields. Plan to scout, opening whorls or ears, and looking at leaves.

July 11, 2025

ICM Blog article: https://crops.extension.iastate.edu/post/fall-armyworms-making-appearance-2024

Read More about IA Pest Alert: Fall armyworms are showing up in corn fields. Plan to scout, opening whorls or ears, and looking at leaves.
IA Pest Alert: Soybean gall midge confirmed in 2 new counties. Be on the lookout for dead and wilted plants, often mistaken for hail damage.

July 8, 2025

Encyclopedia article: https://crops.extension.iastate.edu/encyclopedia/soybean-gall-midge

Read More about IA Pest Alert: Soybean gall midge confirmed in 2 new counties. Be on the lookout for dead and wilted plants, often mistaken for hail damage.
IA Event Alert: Plan to attend the Corn Borer Field Day on July 23! Fee is $25 and includes lunch.

July 7, 2025

Registration link: https://crops.extension.iastate.edu/event/2025/corn-borer-field-day
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Event Alert: Plan to attend the Corn Borer Field Day on July 23! Fee is $25 and includes lunch.
IA Pest Alert: Soybean gall midge larvae are active in Iowa. Plan to scout field edges for lesions.

June 17, 2025

Encyclopedia article: https://crops.extension.iastate.edu/encyclopedia/soybean-gall-midge

Read More about IA Pest Alert: Soybean gall midge larvae are active in Iowa. Plan to scout field edges for lesions.
IA Pest Alert: Help ISU monitor corn rootworm adults this summer! Traps are at no cost to you.

June 16, 2025

ICM News article: https://crops.extension.iastate.edu/cropnews/2025/05/call-volunteers-help-us-monitor-adult-corn-rootworms-2025

Read More about IA Pest Alert: Help ISU monitor corn rootworm adults this summer! Traps are at no cost to you.
IA Pest Alert: Begin scouting for alfalfa weevil larvae.

April 4, 2025

ICM News article: https://crops.extension.iastate.edu/cropnews/2025/04/2025-alfalfa-weevil-egg-hatch-underway

Read More about IA Pest Alert: Begin scouting for alfalfa weevil larvae.
IA Pest Alert: The Handy Bt Trait Table for field corn has been updated for 2025!

February 27, 2025

Link included: https://www.texasinsects.org/bt-corn-trait-table.html

Read More about IA Pest Alert: The Handy Bt Trait Table for field corn has been updated for 2025!
IA Pest Alert: Register to attend the FREE soybean gall midge webinar happening this Thursday!

February 24, 2025

Registration link: https://extension.umn.edu/event/midwest-soybean-gall-midge-research-update

Read More about IA Pest Alert: Register to attend the FREE soybean gall midge webinar happening this Thursday!
IA Pest Alert: The 2024 corn rootworm monitoring network summary is available online.

February 7, 2025

Link included: https://cornrootworm.extension.iastate.edu/files/inline-files/2024%20CRW%20Network%20Summary.pdf

Read More about IA Pest Alert: The 2024 corn rootworm monitoring network summary is available online.
Event Alert: Plan to attend one of the 12 Crop Advantage Series meetings in January 2025. Early registration is open.

December 16, 2024

Registration link: https://www.regcytes.extension.iastate.edu/cas/
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about Event Alert: Plan to attend one of the 12 Crop Advantage Series meetings in January 2025. Early registration is open.
IA Pest Alert: Speed Scout for soybean aphids. Consider crop stage and insecticide choice before spraying late in the season.

August 27, 2024

ICM News article: https://crops.extension.iastate.edu/cropnews/2024/08/it-too-late-spray-soybean-aphids
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: Speed Scout for soybean aphids. Consider crop stage and insecticide choice before spraying late in the season.
IA Pest Alert: Keep an eye out for fall armyworm in alfalfa, pastures, corn, and soybeans.

August 21, 2024

ICM News article: https://crops.extension.iastate.edu/blog/ashley-dean-erin-hodgson-rebecca-vittetoe-shelby-gruss/fall-armyworms-making-appearance-2024
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: Keep an eye out for fall armyworm in alfalfa, pastures, corn, and soybeans.
IA Pest Alert: Keep an eye out for ear-feeding pests as you scout. Finding the insect is ideal, but this resource could help identify injury to ears.

August 12, 2024

Included link: https://academic.oup.com/jipm/article/15/1/18/7642040

Read More about IA Pest Alert: Keep an eye out for ear-feeding pests as you scout. Finding the insect is ideal, but this resource could help identify injury to ears.
IA Pest Alert: Several species of aphids are infesting corn. Consider crop growth stage, other stressors, and location of infestation before making insecticide decisions.

July 30, 2024

ICM News article: https://crops.extension.iastate.edu/cropnews/2023/08/corn-aphids-observed-iowa

Read More about IA Pest Alert: Several species of aphids are infesting corn. Consider crop growth stage, other stressors, and location of infestation before making insecticide decisions.
IA Pest Alert: Does it pay? The Corn Fungicide ROI Calculator is a new tool available from the Crop Protection Network

July 19, 2024

Included link: https://cropprotectionnetwork.org/fungicide-roi-calculator
This alert was sent to all subscribers of the Iowa Pest Alert Network.

Read More about IA Pest Alert: Does it pay? The Corn Fungicide ROI Calculator is a new tool available from the Crop Protection Network

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