08/20/2024
Dr. Alejandro Del-Pozo reports Fall Armyworms have been confirmed in several Virginia locations. Scout for these pests and be prepared to act. And make your decision about applying control preemptively.
Below is an excerpt from an earlier email about this pest.
Update from Dr. Alejandro Del-Pozo
Below there is some information that our industry can use to be on top of scouting for fall armyworm
Several people have already contacted me reporting the presence of fall armyworms in lawns, and even in golf courses.
It is highly suggested to start scouting for these caterpillars in our lawns. The sooner you could spot them, the easier will be to manage them.
What do I need to scout for this pest?
03 gallons of water per lawn
Liquid dish soap (our suggestion is to use a lemon-scent soap)
Measuring utensils
How do I start?
Mix 3 tablespoons of the dish soap in one gallon of water
Then pour one gallon of the soap solution over 2 squared-foot area of the lawn
What is next?
Spend at least 5 minutes observing the areas of the lawn where you pour the soap water
Be patient, it takes some time for these caterpillars to move up from the thatch, since the dish is an irritant for them
There will be several insects and other arthropods crawling out from this area
Remember to look for caterpillars with the “Y” suture on the front of their heads to confirm the presence of fall armyworms
Repeat this drench technique in a total of three different spots in one lawn
I found this great video in YouTube, summarizing a soap flush to scout fall armyworms in lawns, made by “DoMyOwn”
The link below will take you to this video
https://www.youtube.com/watch?v=eOQOvTGlpfE
Also, our colleagues at NC State have great information about soap flushes at the following page:
https://ncturfbugs.wordpress.ncsu.edu/homepage/monitoring-for-turfgrass-insects-2/below-ground-insects/soap-water-flush-v-2/
If you end finding fall armyworm in the lawn you scouted, please plan to manage them accordingly.
Remember that the larger the caterpillars, the harder is to control them.
Information regarding management is summarized in our own VCE publication at
https://www.pubs.ext.vt.edu/SPES/SPES-357/SPES-357.html
Alejandro Del-Pozo, Ph.D.
Assistant Professor & Extension Specialist
Virginia Polytechnic Institute and State University
Department of Entomology
Hampton Roads Agricultural Research and Extension Center
Turf and Ornamental Insect Pest Management