Source: NCSU COOPERATIVE EXTENSION SERVICE, 8/10/17


We track local insect populations throughout the growing season using a system of traps, temperature-recording devices, and degree-day models. Traps and weather data are checked weekly, with results updated by Wednesday afternoon from April through September.

Codling moth degree-day accumulations range from about 2340 in Henderson County (tail end of the 2nd generation) to 2680 in Cleveland County (beginning of 3rd generation). In orchards that have low populations and are relatively free of damage at this point in the season, it is rare for codling moth populations to become an issue. However, in orchards that have battled codling moth throughout much of the year, it remains a concern.

Oriental fruit moth pheromone trap captures remain low in most commercial orchards, probably due to pyrethroid applications for brown marmorated stink bug. OFM should not be a concern in orchards where pyrethroids will be used for BMSB control.
There was a slight increase in Brown marmorated stink bug damage this past week, which is expected with adult populations continuing to emerge. However, overall damage levels are relatively low, indicating that insecticide applications are doing a good job protecting fruit.

For the first time this season, there was a relatively large jump in Apple maggot captures this week, which is the first time this season this insect emerged in significant numbers. Pyrethroid applications made for BMSB should provide adequate control of apple maggot. If pyrethroids are not being used for BMSB, other options for apple maggot control include Admire (imidacloprid), Imidan, and Surround.

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