- Page 1 of the report below (see .pdf file) shows trap counts from monitored fields through August 6th. A map of the field sites is available.
- Page 2 of the report includes:
- a written summary of the data and
- a graph of cucumber beetle/southern corn rootworm (Diabrotica u. undecimpunctata) activity 2025 vs. 1999-2015.
Data Report – July 31st
- The table below shows trap counts from vegetable fields and a research farm within the Willamette Valley, OR. through July 23rd.
- A map of the field sites describes location codes.
Data Report – July 22nd
- The table below shows trap counts from vegetable fields and a research farm within the Willamette Valley, OR. through July 15th.
- A map of the field sites describes location codes.
- Most pests continue to be detected dramatically less than they usually are for this time of year. Since May, there have been almost no black cutworm, cabbage looper, corn earworm, or diamondback moths in the traps.
- Diabrotica undecimpunctata (also known as spotted cucumber beetle) activity is increasing. However, it is still within normal levels of 2-5 per day at monitored sites.
- Additionally, we are partnering with a national project to monitor Diabrotica virgifera beetle, the western corn rootworm. More information about that effort can be found on the Oregon IPM Center’s website.
Data Report – June 23rd
- Pheromone traps are placed at commercial vegetable fields as well as at the OSU Vegetable Research Farm in Corvallis.
- A map of field sites and their associated codes is included in the .pdf below.
- ***So far, all monitored species are well-below their normal activity levels.***
- Trap counts are available real-time on the Oregon Pest Monitoring Network (OPMN). This system includes a data dashboard with an interactive map of monitored locations. Users can select filters to refine results by crop or pest, and access predictive forecasts for ~12 pest species. Check it out at: https://beav.es/OPMN
Data Report – July 22nd
- Per-site and regional averages remain much lower than normal.
- Remember to continue regular scouting for flea beetles and aphids.
- Cabbage white butterfly counts are done visually (not via pheromone traps). On a sunny day, scan the landscape for adults; they have a distinctive, erratic flight pattern. If many are seen, return in 5-7 days to check for rocket-shaped, singular eggs or small larvae on the underside of leaves.
- We are noticing increased activity of western corn rootworm (Diabrotica virgifera) beetles in corn fields. Related to 12-spot, adults have black ‘smear’ stripes on the elytra, rather than spots. Our student, Kyleah, is monitoring rootworm beetles as part of a larger, national network. Read her summary to learn more about what we’ve seen so far.
View the DATA TABLE below:
Data Report – July 10th
- Overall, a very slow start! Below normal looper levels and almost no black cutworms detected since May.
- True armyworm counts are increasing, both at Hyslop and throughout the valley (monitored near cereal, grass, and forage fields).
- The hatch of winter cutworm at Hyslop is alarming, but aligned with what we know so far about their lifecycle. Females require about 4 weeks to mature eggs, which means larvae could be present by early to mid-August.
- Given the recent heat wave, flea beetles will likely be present on brassicas. Scout vigilantly and often.
View the DATA TABLE below:
Data Report – July 25th
- There has been an abundance of Corn Earworm (Helicoverpa zea) moths near fresh market corn in Linn County, which affects the average, but all other sites remain low to normal. Timing is closely associated with crop development (moths appear at silk and lay eggs), so we keep a close eye on CEW for the coming weeks. Also, we are in the process of reviewing long term activity data that may help to improve degree-day models for this region.
- The Oregon IPM Center is collaborating on a survey for Western Corn Rootworm. The research effort is led by Iowa State University, and includes Extension educators, field crop specialists, and ag industry representatives in 13 U.S. states and 5 Canadian provinces. More info available here.
- Black Cutworm (Agrotis ipsilon) counts remain lower than historically normal levels. Although sweet corn plantings are likely past the sensitive stage, remember that black cutworm also feeds on tomatoes and other garden crops.


Data Report – July 14th
- All ‘usual suspect’ crop pest moths (loopers, cutworms, corn earworm) are within normal activity levels.
- Diabrotica undecimpunctata (12-spot / cucumber beetles) have 2 generations per year. They may be feeding underground now as rootworms, and expect to see more adult beetles in the landscape in the coming weeks. Rootworms feed underground, and adults chew on foliage of a wide variety of crops and weeds.
- Heat brings on flea beetles. Keep an eye on any newly planted fields, beetles tend to move in from the margins.
- See data table below…

Data Report – June 24th

Important “Do” Dates
- FEB 6th re: AgCensus – Every 5 years, USDA’s National Agricultural Statistics Service offers producers large and small (>$1K of annual sales or potential) opportunity to participate in the census. The data collected help guide legislature, research, and most importantly, show the value and importance of American agriculture. The law requires that operator information remains confidential and used for aggregate data reporting only.
- FEB 13th re: EPA Rodenticide Proposed Interim Decision (PID) – Lots of other agencies covering this, but just in case…be aware that many changes are being proposed that could impact your operation. Applicator licensure, restrictions or revoking use, timing and placement, increased PPE, and mandatory or advisory post-application carcass searches, to name a few. Learn more from the Rodenticide Task Force or EPA.
- MAR 15th re: Commodity Commission Openings – 19 of the 23 state commissions have open seats that need filled. Again, a great opportunity to ensure your voice is heard and help guide decision-making. OPVC is my favorite 🙂 but let your own interest and experience guide you! Learn more and apply via ODA.