The Effectiveness of Neonicotinoid Seed Treatments in Soybean

Neonicotinoid soybean seed treatmentNeonicotinoid seed treatments are used on a large percentage of soybean acres. However, the value of these treatments was questioned in a 2015 EPA report. In response, field crops entomologists from 12 northern states, including Robert Koch and Bruce Potter from the University of Minnesota, collaborated to create a new multipage extension publication, entitled The Effectiveness of Neonicotinoid Seed Treatments in Soybean. Publication announcement page.

Source: The Effectiveness of Neonicotinoid Seed Treatments in Soybean – effectiveness-of-neonicotinoid-seed-treatments-in-soybean.pdf

Corn Test Plot Harvest Day 2013

As we work our way through harvest, one of the events we look forward to is harvesting our corn test plot. A lot of time and thought go into choosing hybrids for this plot. This plot is an extremely vital part of our operation’s decision making process for the next year’s corn varieties.

Because our operation focuses heavily on corn varieties that use hybrids with less insect traits than the companies are pushing, there is little plot data available to help us make decisions on these hybrids. This is a part of our broad plan to deal with corn insect resistance issues. Continue reading

Post emerge weed control in soybeans

The time has come to do our post-emerge application of Roundup on our soybeans. This spring we used a pre-emerge herbicide on our our fields. The soybean fields looked so clean we delayed longer than usual with our post emerge application. When we started spraying we realized the mistake we had made. The remaining weeds were 1 foot or taller. Too large for Roundup to do significant damage to. Many will burn down and then come back. Scouting the field one week later we already saw signs of new growth on waterhemp that looked dead from a distance. We also found 1 1/2 foot tall waterhemp than had little or no damage to the plant from our Roundup application of 38oz/acre.

Spraying Roundup on beans 2 Spraying Roundup on beans

 

 

 

 

 

 

 

On two fields we chose to take more drastic measure and hired migrant workers to hoe out our resistant weeds. They showed up two weeks after spraying and spent a few days walking the fields.

Bean walkingBean walking 2

 

 

 

 

 

 

 

We also dug our old bean rider out of the shed and did some field border spraying from that.

Bean rider

 

 

 

 

 

 

 

Not to leave any weed patches untouched, we finally brought out our own hoes and went after some stray weeds with them.

Hoeing beans

Minnesota Soybean Symposium – Pesticide Resistance

Seth NaeveThere were some great presentations and two-way dialogue between university researchers and attendees at the 2013 Soybean Symposium sponsored by the U of M and the MN Soybean Research & Promotion Council. This event has been held at the U of M Landscape Arboretum since it’s inception.

This year’s sessions focused on resistance management of soybean insects, diseases and weeds as well as corn root worm beetles. Attendees were crop consultants, farmers, agronomists as well as a number of ag media representatives. The seed company reps may have been uncomfortable with some of the topics discussed because, if the farmers followed the recommendations, especially on soybean seed treatments, it would go against what they’re pushing on the farmers. Continue reading