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One of the more popular pages on the old ISU Weed Science website was the Herbicide Ad Hall of Shame. It featured ads that I deemed went against Integrated Pest Management (IPM) principles. Recently, two of my colleagues nominated the attached ad that promotes the effectiveness of dicamba in...
The weather forecast is calling for temperatures to dip close to freezing tonight (10/12/16) in south central/southeast Iowa, which could mean that we may see a light frost. What does...
A grower provided us a sample of the seed mix used on one of the conservation plantings where Palmer amaranth developed following planting. We were able to extract Amaranthus seed from the native seed mix. Since it is difficult, if not impossible, to visually differentiate the ...
In my previous post, I discussed six key factors to keep in mind when considering hybrid choices for 2017, including: cost, disease tolerance, insect package...
Many people have been asking me about little black bugs biting them this summer. Have you experienced this? I would have to guess they would be minute pirate bugs, also known as insidious flower bugs.
Harvest is underway! Long days and short nights in the combine, tractor and truck give farmers time to reflect. Key things to remember from 2016 are the wet spring, dry June, wet and late summer, and early fall. With commodity prices lower than past years farmers need to begin developing budgets...
Palmer amaranth has been identified in newly-seeded conservation plantings in more than 30 Iowa counties, and we would not be surprised if the actual number is double that. The number of Palmer amaranth plants per acre has typically been low enough (<250 plants per acre) to make physical...
Right now, I have five different insects walking around my office! Of course, they are accidental invaders along with many other nuisance pests active right now. It’s also a sign of the quality of the building I work in [sigh]. I’ve been asked several times, “how cold does it have to get to...
Seems like I have written an article on stalk rot about every year for the last five or six seasons. Luckily, for the most part, the last few years it was a “heads up” about a relatively small amount of fields that were having lodging issues. However, this year it sure seems like stalk integrity...
From a non-farm citizen perspective, safety on the roads is imperative. We have to be aware that during harvest and fall field work season, there will be a lot of large and slow moving equipment on the roads. There will also be a lot of grain trucks on the roads, and it is a tough job to drive...
Safety is always a priority for farmers at harvest, but this year may push us harder than most. If our current wet weather pattern continues into the fall, it could be a muddy, difficult 2016 harvest season.
Sept. 18-24 is National Farm Safety and Health Week and Iowa Farm Safety and Health Week. Clarke McGrath, on-farm research and extension coordinator for the Iowa Soybean Research Center and extension agronomist at...
I tell students in my ID class that weed identification is easy since very few species have traits that allow them to persist in disturbed habitats, thus you run into the same weeds over and over. After a few years in the business, you seldom encounter a weed you haven’t dealt with before. That...
On Sept. 8, Iowa State University Extension and Outreach hosted a fall field day at the ISU Southeast Research and Demonstration Farm near Crawfordsville, Iowa.
Corn is nearing the end of its maturity here in northeast Iowa, where most of it is in between R5.75 (3/4 milk line) and R6 (physiological maturity), with the late planted fields at or past R5.5 (1/2 milk line). With all of the moisture that we’ve seen here in this area of the state, we have...
During July and August, warm nights may accelerate maturity of corn to the detriment of yield. In most areas of Iowa, 2015 and 2016 were much alike for corn. In this case, nighttime temperatures may indeed be the major factor resulting in a yield improvement or diminished yield in 2016 since...
The early signs of corn and soybean in particular ready for harvest are around the corner, and it is time to think about your next season conservation plans.
On Sept. 8, Iowa State University Extension and Outreach hosted a fall field day at the ISU Northern Research and Demonstration Farm in Kanawha, Iowa. The fall field day focused on water quality topics, cover crops, corn rootworm, and included a wetland tour.
Much of the corn that was planted in mid-April is mature or nearly mature. Some hybrids really progressed a lot this past week (Sept. 5-Sept. 12). Corn planted in early May and mid-May is about 1/2 to 3/4 milk line. I think I am seeing some of the...
Iowa State University Extension and Outreach field agronomists report crop conditions in south central, southeast, and east central Iowa.
As you venture around the countryside this time of year you might notice the presence of a plant with white flowers along the edge of woodlands. There is a good chance this plant is white snakeroot, a perennial in the Asteraceae (sunflower family). The plant is adapted to shady areas with low...
I took my final Labor Day Palmer amaranth tour on Saturday, visiting the first three known sites of Palmer amaranth in western Iowa. First stop was Harrison County, ground zero for Iowa Palmer amaranth. The Palmer was identified in the summer of 2013 in a 50 acre fallow field; because of the...
The first step in managing any pest is correct identification. For Palmer amaranth, we have stressed the need to examine the inflorescences of female plants for the presence of the large, sharp bracts. Farmers/agronomists are not accustomed to examining flowers since almost all weeds can be...
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.