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Most people are aware of the multiple findings of Palmer amaranth across Iowa this month. Palmer amaranth has been identified both in crop fields and in conservation plantings using native seed mixes. Early detection is essential in order to prevent the new weed from getting permanently...
Iowa State University Extension and Outreach field agronomists report crop conditions in your area of the state.
Mark you your calendars for the Southeast Research and Demonstration Farm's Fall Field Day, which is set for September 8. Registration will begin at 1 p.m. with the tour starting at 1:30 p.m.
The featured stops for this year's field day include a presentation on UAVs with a demonstration...
A new FACTS (Forecast and Assessment of Cropping sysTemS) forecast occurred on August 11, 2016. The forecast can be found here.
The weather this growing season continues to be the big story and can be characterized by two...
Although rain moved us indoors, we had a great turnout for the 2016 Weed Identification Contest. This year's winner in the Professional Division is long-time participant Cindy Recker of Peosta, IA. Cindy, a member of ISU's Crop Judging Team when she was a student, correctly identified 37 of 40...
Iowa State University Extension and Outreach field agronomists report crop conditions in your area of the state:
Several soybean diseases have become noticeable after recent rainfall across the state.
The following diseases are currently showing up regularly across Iowa soybean fields, depending on your location in the state:
On Tuesday, Aug.2, eight teams of Iowa youth (grades 9-12) participated in the sixth annual Crop Scouting Competition. The teams were scored on their knowledge of crop insects, diseases, growth and development, and weed identification with a written test and field stations located throughout the...
Iowa State University Extension and Outreach field agronomists report crop conditions in your area of the state.
Typically anthracnose is a disease associated with corn as a leaf blight or stalk rot, or ...
Iowa Code 317 is the section of the Iowa Code that defines the Iowa Noxious Weed Law. Chapter 317.1 is the piece of legislation that actually defines which weeds are classified as noxious. I like to refer to this piece of legislation as the most out-of-date law in our great state, although I...
A recent visit to a field with three different planting dates showed the varied crop progress in my area.
The Useful to Usable website uses local information to predict crop development and crop maturity. The following...
Iowa State University Extension and Outreach field agronomists report crop conditions in your area of the state.
Japanese knotweed is one of the most difficult weeds to eradicate due to its extensive woody root system. In England it is notorious for caving in basement walls where it was planted as a foundation plant. At least 15 years ago I discovered a 'nice' patch of Japanese bamboo along the banks of...
ISU Field Agronomists around the state have noted Japanese beetle feeding injury in corn and soybean over the last week. Japanese beetles have a wide host range that includes many species of fruit and vegetable crops, ornamentals, and field crops. Adults prefer to feed between soybean leaf veins...
This past week I have been busy with disease diagnostic workshops at the ISU Field Education and Extension Laboratory. For those of you who have attended my sessions before, you know that I usually have a quiz that consists of leaves with various diseases and disease look-a-likes or imposters. I...
The lowest level of insect injury where damage can be measured is called the damage boundary. The damage boundary is a biological relationship between the insect, crop, and environment; and is independent of input costs (e.g., seed, insecticide, etc.). Managing a pest below the...
This spring consisted of wet field conditions for many regions across Iowa during planting season. When soil moisture is at or exceeds field capacity, there is an increased potential for soil compaction, particularly at topsoil depths. Soil compaction at planting time can impact root growth and...
Soybean aphid feeds fluids within the phloem fluids (sometimes referred to as "sap") by inserting piercing-sucking mouthparts directly into the phloem vessels. Prior to feeding, aphids "taste" the sap to determine if the plant is a suitable host species and if the quality is acceptable. Once...
I’ve seen more people walking beans and had more comments about it than I can remember in a long time. Perhaps it's time for Greg Brown to re-release his classic ‘Walking the Beans’, first released on ‘The Iowa Waltz’ album in 1981....
The current epidemic of wild parsnip has garnered much attention due to the toxins present in the plant. Since wild parsnip is a biennial, mowing is often recommended as a control option. The theory is that by preventing seed production, mowing can eliminate future infestations. In practice,...
Iowa State University Extension and Outreach field agronomists report crop conditions in your area of the state.
Northwest...
About twice a year I get asked these questions. "Angie, what are you doing to promote cover crops in north central Iowa? We just don't have many acres of cover crops up there." Or, "Angie, what can we do to get more cover crops in north central Iowa?" I usually chuckle at these questions, and...
Western corn rootworm (WCR) and northern corn rootworm (NCR) eggs overwinter in the soil and larval hatch is based on accumulated degree days (ADD) of soil temperatures each year. Average hatching dates for Iowa are in early June, with southern counties experiencing egg hatch before northern...
Since the last clinic update (6/17/2016), we are starting to transition from seedling diseases to foliar diseases. There is quite a bit of concern from clients about getting an early jump on foliar diseases, in order to plan for foliar fungicide applications. Similarly to the last blog, a...