Insect Notes From Rick Brandenburg for Agent Training Session

— Written By

David,

From my perspective, the most important information is as follows:

Significant changes in control recommendations. A slimmed down version with a lot of seldom used products deleted. Hopefully this makes it easier to read and use. Post plant options for thrips are grouped with pre plant and updated for thrips and I hope that makes thrips management easier to read and decipher. .

Cruiser Maxx is listed as “suppression only”. I cannot recommend based solely on thrips control

I defer to Barb on Velam Total. We have seen reasonably good thrips control so it certainly can be recommended from that perspective if there are other benefits.

Prevathon added to worm control, including lesser cornstalk borer

Spinosad updated with Blackhawk trade name

Update of risk indices on our risk management web site will hopefully be of value to everyone. We will have the most reliable product cost information included that we’ve ever had for insects.

At present the status of neonics such as Admire seems to be OK, but there was just a study released showing bird kills. Just one study, but it is out there even though neonics really aren’t terribly toxic to birds, so a bit of skepticism with it. Time will tell. Nothing of great value in pipeline to replace Acephate.

We will have to wait and see on Lorsban. I think the comment period is over and I wrote a comment, but most comments were negative indicating this deadly toxin needed to be banned before it destroyed the world. No really effective alternatives available for SCRW yet, but I wouldn’t be surprised if we don’t get some trials this summer since companies may now have an incentive to look at that market. The market in NC has certainly shrunk with our shift in acreage and SCRW are seldom a problem in other states, so the market is small

Continue our 3 year research project with UGA looking at thrips thresholds. Interesting information from last year and I am still sorting through all of the data. We can’t assume that the new cultivars are equally susceptible to pest pressure as the ones from 40 years ago, when thresholds were developed. That being said, thrips do cause yield loss

The 3 week post application of Acephate continues to show a “kick in the pants” to the crop when applied in years with moderate to severe thrips pressure. Hard to argue against that “non-IPM” approach. It appears to pay off most of the time.

No reason to believe that TSWV is going to make a leap this year, but farmers should remain vigilant and not drop those practices that help suppress TSWV. This is important. Out of sight, out of mind, should not be a policy.

NO prediction on insect pest pressure this year. We see more resistance in corn earworm each year, not epidemic, but of concern and treatment should only occur when necessary. More tobacco budworms showing up in peanuts each year and these are more difficult to control that earworms so farmer have two things working against great control. We are monitoring both resistance and budworm presence and at this time, I am not inclined to make any changes in our recommendations, but farmers will need to understand that 70% control has become the new 100%.

Ames is retiring this spring and they have hired a replacement and we will work together.

Hope that is helpful.

Rick

Article first appeared as North Carolina Peanut Note (PNNC-2016-009)

Written By

Dr. David JordanExtension Peanut Specialist (919) 515-4068 david_jordan@ncsu.eduCrop and Soil Sciences - NC State University
Updated on Feb 29, 2016
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