Note: Today’s edition is the last regular IPM Update of the season. We will continue to monitor late season crop pests and will publish updates as necessary.
Sweet Corn
Corn earworm (CEW) moth catches declined dramatically over this past week with evening temperatures dropping into the high 40s in many locations (see CEW blacklight map at left). In this map, areas in green roughly correspond to a 3-day schedule, while blue areas are in the 4-5 day range. Blue points within larger green areas should be considered “outliers”, and the broader color scheme in any particular region is more representative of the population. The current situation may change with somewhat warmer night temperatures forecast toward the end of the week. Should night temperatures begin to approach 60F or more, growers should consider treating remaining silks on a 3-4 rather than a 4-5 day schedule. Be aware that synthetic pyrethroids have become less effective at managing ear infestations from this pest over the past several years. For this reason, it is advisable to include products in the IRAC group 28 (Coragen, Besiege) or IRAC group 5 (Radiant, Entrust (OMRI approved)).
The highest nightly CEW blacklight trap catches are as follows:
| Georgetown 5 | Farmingdale 2 | Chester 1 |
| New Egypt 5 | Allamuchy 1 | Centerton 1 |
| Crosswicks 3 | Beckett 1 | Eldora 1 |
| Matawan 3 | Belvidere 1 | Eldora 1 |
