SDSU Associate Professor and Extension Field Crop Entomologist. Research and Extension focus on pest and beneficial insects present in SD crops.
Joined August 2017
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Adam Varenhorst retweeted
First emergence of #soybeangallmidge occurred this past week on May 31st at @NebENREEC near Mead, NE. We haven't seen adult emergence at any other sites in the network. Take a look at the checklist on soybeangallmidge.org to see if action is needed and adult emergence updates.
True armyworm caterpillars spotted in wheat at the SDSU Northeast Research Farm. So far defoliation is minimal, but wheat should be scouted from now until harvest to monitor populations. extension.sdstate.edu/true-a…
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Army cutworm caterpillars are active in South Dakota.
Wondered why the winter wheat wasn’t greening up as quick in areas throughout the field. Little bastards are already at it. #cutworms
Adam Varenhorst retweeted
Wondered why the winter wheat wasn’t greening up as quick in areas throughout the field. Little bastards are already at it. #cutworms
The evening temperatures have been pretty low but insect activity in South Dakota is increasing. Army cutworm caterpillars have been observed in alfalfa. extension.sdstate.edu/its-ti…
Check out the latest issue of the SDSU Extension Pest and Crop Newsletter. This particular issue covered a lot of insect pest topics. igrow.cmail19.com/t/ViewEmai…
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Adam Varenhorst retweeted
Found some soybean aphids this afternoon on the Minnehaha/Moody county line. @SDSUExt_Insects @sdsoybean
Adam Varenhorst retweeted
Scouting fields on Friday for #westernbeancutworm, and some had 0% egg masses, but I still saw adult moths resting inside whorls. This one is a gravid female, meaning she is plump full of eggs to lay over the weekend. That means we’ll be scouting again on Monday!
Adam Varenhorst retweeted
Lots of #soybeangallmidge adults emerging from this year’s soybean fields in Saunders County, NE. We don’t have any recommendations for managing adults this late in the season. @erinwhodgson @SWMNpest @SDSUExt_Insects @LaurenBotine @CurtHoffbeck @BobWrightUNL @NebENREC
Adam Varenhorst retweeted
I'm quite confident this is an isolated case, but damn July 6th is too early for this shit. #soybeans
Adam Varenhorst retweeted
It's time to scout! #westernbeancutworm moth numbers are on the rise in North Platte, Nebraska:
July 7=12
July 8=38
July 9=64
Today's online data (bit.ly/2567z8R) brought to you from the mobile field office 🐛🐛🐛
Adam Varenhorst retweeted
More possible severe weather on its way tomorrow in SD. Have at least 2 ways of receiving warnings, and have a safe place plan wherever you are spc.noaa.gov/products/outloo… #sdwx #SDag
Adam Varenhorst retweeted
There is this one that I published with @remallinger @SDSUExt_Insects and @sunflower_bugs academic.oup.com/jee/article…
Adam Varenhorst retweeted
Good information from @SDSUExt_Insects on Pyrethroid Resistant Soybean Aphids @SDAgriBusiness conference day 2.
Adam Varenhorst retweeted
Agronomically optimal soybean seeding rates and associated risk across North America @WISoybean @corteva @StepUpSoy @arksoydoc @dsmuelle @cropdoc08 @Agronomy_Adam @SDSUExt_Insects @KSUCROPS @AlbertTenuta @MartinChilvers1 coolbean.info/wp-content/upl…
Adam Varenhorst retweeted
Listening to some really interesting sunflower insect talks @NatlSunflower @SDSUExt_Insects the answer, we don’t know yet but please use full rates of insecticides when we have thresholds!
Adam Varenhorst retweeted
Looking forward to sharing what our team (@erinwhodgson, @SWMNpest, @SDSUExt_Insects, @BobWrightUNL, and Tom Hunt) has learned this past summer on #soybeangallmidge at the #ICMconference. Make sure you register to hear about this and more great topics!
Adam Varenhorst retweeted
Are you ready for below zero wind chills?
The potential is pretty high Monday and Tuesday mornings for widespread sub-zero wind chill values. Be ready!
Adam Varenhorst retweeted
Some model guidance saying high temps could be around 20 deg below avg in a week #brrrr
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