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Should soybean aphids like AC/DC?

Show: 
Soybean Pest Podcast
Season: 
9
Episode: 
7
Description: 

This might be one of the best episodes yet, because Matt and Erin combine aphids with rock and roll. But first Erin gives a state update on pest activity that includes armyworms, leafhoppers, rootworm and bean leaf beetle. There haven't been any reports of soybean aphid in 2018 but immigration is expected soon. Matt is a friend of the FC Bugeaters and shares recent game activity from the midwest. The F.I.T. focused on an insect-themed game show tune and then they transition to a recently published article that hypothesizes AC/DC is noise pollution for insects. 

 

File: 
Audio icon s9e6_16july2018podcast.mp3
Category: 
Soybean Pests
Tags: 
Aphid
beetle
soybean
pest
scouting
IPM

Aphids are active. Midges, too?

Show: 
Soybean Pest Podcast
Season: 
9
Episode: 
8
Description: 

This Soybean Pest Podcast episode is packed with good stuff! Matt starts off by sharing some positive data from USDA-NASS from Iowa. A recent report showed 45,000 honey bee colonies in Iowa, a 275% increase from 2017. Also, the number of in-season losses is down from last year. Erin talks about a new soybean pest that is showing up in western Iowa. The soybean gall midge can be a devastating stem-boring pest. She summarizes her observations in a recent ICM News article. Erin also notes aphid activity in increasing throughout northern Iowa - in corn and soybean. It's a good time to scout fields to check for aphids. Also, there is a newly-revised field guide for soybean aphid. Find the pdf and hardcopy versions at the Extension Store. Lastly, PFI is hosting a field day on September 6 near Marble Rock. Erin will share some information about host plant resistance for soybean aphid. Click here for more details. 

File: 
Audio icon s9e8_2aug2018podcast.mp3
Category: 
Soybean Pests
Tags: 
soybean
Aphid
midge
scouting
pest

Lawyers, Insecticides and Money

Show: 
Soybean Pest Podcast
Season: 
9
Episode: 
9
Description: 

It's been a few weeks, but Matt and Erin have a new episode out today! Erin starts off by providing a statewide update on soybean pest populations in August. Good news is that most fields had low pest pressure in 2018. Matt shares his impressions of a recent court ruling that will ban chlorpyrifos use in the U.S. The episode title is a play off of Warren Zevon's song, "Lawyers, Guns and Money" from 1978. 

File: 
Audio icon s9e9_30aug2018podcast.mp3
Category: 
Insecticides
Tags: 
Aphid
EPA
insecticide
organophosphate

Matt goes to Brazil

Show: 
Soybean Pest Podcast
Season: 
9
Episode: 
10
Description: 

It's mid-September and the tenth episode of Season 9! Erin provides a brief update on the newest soybean pest in Iowa - soybean gall midge. Activity has slowed drastically since the last episode and is coordinated with quickly maturing fields in western Iowa. Matt traveled to Brazil for a soybean congress and gave some updates on new invasive in this large soybean-growing country. 

File: 
Audio icon s9e10_13sept2018podcast.mp3
Category: 
Soybean Pests
Tags: 
soybean
pest
caterpillar
midge

Monitoring soybean aphid resistance to lambda-cyhalothrin and identification of mutation associated with insecticide resistance

Soybean aphid management has relied heavily on foliar insecticides to protect yield since 2000. In 2016, performance issues have been documented in commercial fields and research plots in northern Iowa counties. With support from the Iowa Soybean Association, we are exploring insecticide resistance for soybean aphid in Iowa and describing the mechanism of resistance. Laboratory bioassays identified field-collected population’s evolved resistance to pyrethroids.

On-farm evaluation of aphid-resistant soybeans

Host plant resistance for soybean aphid is a management tool to protect yield. Our lab has evaluated the efficacy and of host plant resistance but generally with small plot research. Working with Iowan farmers, we evaluated the efficacy of aphid-resistant soybean on commercial farms in Iowa. With funding from the North Central Region – Sustainable Agriculture Research and Education Program, we are studying the potential for aphid-resistant soybeans on a larger scale. We provided farmers with experimental and commercially available soybean varieties containing a 2-gene pyramid (Rag1+2).

Sustainable management of host plant resistance for soybean aphid

With funding from the North Central Soybean Research Program, we are determining if aphid-resistant soybeans can be use with a “refuge-in-a-bag” or RIB. Refuges of pest-susceptible varieties are often included when a pest-resistant variety of a crop is used. By including a refuge, we can produce a population of avirulent aphids so that they can inter-breed and swamp out the genes of virulent aphids that are capable of surviving on the aphid-resistant soybeans.

Effect of crop rotation on the soybean aphid

Longer rotation schemes require less herbicide and reduce frequency of sudden death syndrome in soybean. Crop rotation can alter the soil environment, affecting plant physiology, and may impact insects, like soybean aphid.

Using prairies to reduce interacting stressors on pollinator health

We are exploring how small patches of native, perennial vegetation (i.e., prairie) can increase the abundance and diversity of pollinators within corn and soybean. We observed honey bee colonies in Iowa lose weight beginning in August, when clover and soybean cease blooming. When colonies had access to a prairie from August to October, they were buffered from this late season decline.

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