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Sweet Corn Pheromone Trap Network for Western New York,
This is a seasonal scouting report giving growers in the Western New York area information on the presence of sweet corn pests and recommendations on scouting and thresholds. The report is written by Abby Seaman, NYS IPM's Area Extension Educator for Vegetables.
The warm temperatures have really brought the moths out at a couple of locations, although some locations still have not had any catches.
Fields started under plastic or row cover will be most attractive to egg-laying moths because the plants are larger than in bare ground fields. We have found using the usual tassel emergence scouting and thresholds for plastic or row cover corn doesn't work well. John Mishanec has had good results in trials in which pheromone trap catches were used to time sprays in row cover or plastic corn. Growers waited until there was a significant increase in the ECB trap catches in their area and then timed sprays to coincide with egg hatch. ECB eggs require 100 degree days (base 50) from oviposition to hatch. Under the weather conditions predicted for this week, eggs will take 6-7 days to hatch. A second spray may be needed 6-7 days later if trap catches remain high for a couple of weeks.