Attached are the latest trap results for the Southern Aroostook region.
In general, we have now surpassed the 300 P-day threshold, indicating our crop’s transition to being more susceptible to early blight.
Another late blight field infection was identified in western New York this week (Cattaraugus and Wyoming counties). Growers should remain vigilant in scouting their fields. Total severity value accumulations for the area range between 50-60 DSVs for the season. Historically, we might find field infections around the 70 DSV mark.
We’ve had a bit of a drier spell recently in comparison to the first part of the season, which has dropped us into a 7 to 8-day reapplication interval (sufficient protection for applications made on 7/16 or after). Given the forecast for tonight and tomorrow, we are likely to go back to a 5-day reapplication interval over the weekend.