The current risk for cucurbit downy mildew (CDM) in New England, including southern NH, is moderate according to the CDM IPM forecasting model: https://cdm.ipmpipe.org/forecasting/.
…BUT…a tropical storm is moving up the coast and CDM is active in PA.
It is likely that the risk will be high by later today (Friday 7/10/2020) or tomorrow (Saturday 7/11/2020).
We've been getting many calls about problems with pre-emergent and other soil-applied herbicides and it sounds like this dry weather has a role to play. Click on these links to listen in to our conversation with Dr. Thierry Besançon (Rutgers University) about the role of rainfall and/or irrigation in getting soil-applied herbicides where they need to be, and keeping them away from where they shouldn't be. We discuss two scenarios where dry weather can cause problems: