WNC Orchard Insect Pest Populations – May 19, 2025
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Codling moth degree-day accumulations range from about 370 in Henderson County (2100 ft) to about 600 in the lower elevation of Cleveland County (about 900 ft). This represents peak activity throughout the region, so if not using pheromone traps to monitor populations, one should assume a damaging population exists and a codling moth recommended insecticide should be applied if one has not been made in the past 10 to 14 days. (See the table of codling moth insecticide efficacy.)
Tufted apple bud moth (TABM) degree-day accumulations are currently about 775 DD in Cleveland County. A single application of either Altacor, Exirel, Verdepryn, Delegate, or Intrepid applied between about 700 to 1200 DD will provide excellent season-long control of TABM. Degree-days in Henderson County are only at about 656, so waiting until the next or following week to apply an insecticide targeting this pest would be ideal.
TABM is a leafroller that was once a major pest in many production areas in the southeast, but since registration of Intrepid in the early 2000s, along with Altacor and Delegate in 2008, it has become a minor pest. However, it continues to be captured in pheromone traps, and when insecticides are not applied, damage has been observed later in the season.
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2025 Average Weekly Trap Captures
| HENDERSON COUNTY | |||
| Insects per trap | |||
| May 5 | May 12 | May 19 | |
| Codling moth | 1.0 | 1.5 | 5.5 |
| Oriental fruit moth | 12.0 | 12.0 | 13.5 |
| Tufted apple bud moth | 49.0 | 49.0 | 42.0 |
| Redbanded leafroller | 0.0 | 0.0 | 0.0 |
| Obliquebanded leafroller | 1.0 | 1.0 | 5.0 |
| Lesser appleworm | 14.0 | 14.0 | 12.0 |
| Apple maggot (research orchards) | n/a | n/a | set |
| Apple maggot (abandoned orchard) | n/a | n/a | n/a |
| Brown marmorated stink bug (commercial) | 1.1 | 0.6 | n/a |
| Brown marmorated stink bug (unsprayed research orchard) | 0.0 | 0.3 | 1.0 |
| Spotted tentiform leafminer | 0.0 | 0.0 | 0.0 |
| Dogwood borer | 18.0 | 29.0 | 48.0 |
| Peachtree borer | 0.0 | 0.5 | 2.0 |
| Lesser peachtree borer | 49.5 | 9.0 | 63.0 |
| San Jose scale | 0.0 | 0.0 | 1.7 |
*Note that these averages illustrate only the timing of insect emergence and fluctuations in populations, and are not representative of population levels in any given orchard. The only way to have an accurate assessment of an individual orchard’s populations is to set up traps in that orchard.
2025 Accumulated Degree Days
| HENDERSON COUNTY | ||||
| May 5 | May 12 | May 19 | ||
| Codling moth (Biofix: April 21) | 202 | 263 | 391 | |
| Oriental fruit moth (Biofix: March 17) | 666 | 757 | 920 | |
| Tufted apple bud moth (Biofix: April 14) | 343 | 435 | 598 | |
2025 Insect Population Trends
