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Iowa Crop Update: Drought, Hail Damage, Weed Escapes, and Soybean Aphids

Iowa Crop Update: Drought, Hail Damage, Weed Escapes, and Soybean Aphids

👤By Rebecca Vittetoe, Iowa State University Agronomist 🕔Aug 15, 2017

#Drought17, late season hail damage, weed escapes, and soybean aphids seem to be the big issues ISU Extension field agronomists are seeing in fields across the state this past week. Read on for more information about your region’s crop progress and

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Iowa: Seeding Cover Crops in Dry Conditions

Iowa: Seeding Cover Crops in Dry Conditions Updated

👤By Angie Rieck-Hinz and Meaghan Anderson, Iowa State University Extension Agronomists 🕔Aug 14, 2017

We are quickly approaching the time of year when we aerially seed cover crops into standing corn and soybeans.  Earlier seeding allows for more growth and consequently more biomass to protect soils from erosion. It also allows the opportunity to

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Iowa: Dicamba Off-Target Injury Complaints Continue to Rise

Iowa: Dicamba Off-Target Injury Complaints Continue to Rise

👤By Bob Hartzler, Iowa State University Weed Specialist 🕔Aug 4, 2017

As of July 20, the Iowa Department of Agriculture and Land Stewardship (IDALS) had received 142 cases of pesticide misuse, historically this number has ranged from 58-85 at this time of year. Dicamba was involved in 46 of these cases. Two of the

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Iowa Corn, Soybeans: Control Options for Twospotted Spider Mites

Iowa Corn, Soybeans: Control Options for Twospotted Spider Mites

👤By Erin Hodgson, Iowa State University IPM Specialist 🕔Aug 4, 2017

According to the U.S. Drought Monitor, most of Iowa is still considered abnormally dry. Twospotted spider mites are erratic pests in some corn and soybean fields right now, particularly in southern Iowa. I’ve been getting a lot of questions about

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Iowa Field Reports: Drought Continues to Spread, Insects Present but Few Problems

Iowa Field Reports: Drought Continues to Spread, Insects Present but Few Problems

👤By Rebecca Vittetoe, Iowa State University Agronomist 🕔Aug 2, 2017

Rainfall continues to be scattered across the state. According to the U.S. Drought Monitor, 64% of the state is abnormally dry, 34.7% is in a moderate drought, and 1.6% is in a severe drought. ISU Extension field agronomist share what

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Iowa Corn, Soybeans: Two-Spotted Spider Mites Persist – Identification and Management

Iowa Corn, Soybeans: Two-Spotted Spider Mites Persist – Identification and Management

👤By Meaghan Anderson and Rebecca Vittetoe, Iowa State University Extension Entomologists 🕔Aug 1, 2017

Observations across several counties in southeast and south central Iowa show that, despite some recent rain events and high humidity, twospotted spider mites are persisting in both corn and soybean fields across the area.  These insect-like pests can be very

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Iowa Corn, Soybeans: Drought Stress Promotes Spider Mite Injury

Iowa Corn, Soybeans: Drought Stress Promotes Spider Mite Injury

👤By Erin Hodgson, Iowa State University IPM Specialist 🕔Jul 27, 2017

A few places in southern and northwestern Iowa have already reported twospotted spider mite populations with prolonged feeding in soybean this year. I recommend scouting corn and soybean fields for mite infestations because they thrive in hot and dry conditions.

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Iowa: Palmer Pigweed – Now’s a Good Time to Scout

Iowa: Palmer Pigweed – Now’s a Good Time to Scout

👤By Meaghan Anderson, Iowa State University Field Agronomist 🕔Jul 26, 2017

As of February 2017, Palmer amaranth had been found in 49 of Iowa’s 99 counties.  A native of the American southwest, Palmer amaranth is more competitive than common waterhemp, a pigweed native to Iowa.

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Iowa Corn, Soybeans: How Will Hot Weather Impact Crops?

Iowa Corn, Soybeans: How Will Hot Weather Impact Crops?

👤By Mark Licht, Iowa State University Extension Specialist 🕔Jul 21, 2017

Water and temperature affect many crop processes simultaneously ranging from crop growth, development, photosynthesis, respiration, water transpiration, grain fill, and nutrient cycling. The magnitude of high temperature or drought stress depends also on the stage of the crop. Another factor

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Iowa Soybeans: 8 Facts About Charcoal Rot

Iowa Soybeans: 8 Facts About Charcoal Rot

👤By Jody Korthaus and Daren Mueller, Iowa State University Extension Specialists 🕔Jul 18, 2017

1. Develops in hot, dry weather conditions. Charcoal rot is a fungal disease that is most severe in years and areas experiencing hot, dry weather. However, this disease can also cause losses when ample moisture is present, making it a

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