WNC Orchard Insect Pest Populations – June 9, 2025
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Depending on elevation, we are either approaching or in that period when most major pests exhibit a low potential for damage, and when insecticide sprays can often be skipped. Codling moth degree-day (DD) accumulations range from about 720 in Henderson County to 1002 in Shelby. First generation codling moth is generally of little concern following a second period of activity between about 600 and 650 DD, which occurred last week in Henderson County. If not using pheromone traps to monitor for codling moth, and if an insecticide has not been used in the past 14 days, a final application should be considered this week. But in most situations both codling moth and oriental fruit moth populations have been very low this year.
With key pests of relatively low importance at this time, insecticide applications should be based on an as-needed basis for potato leafhoppers, apple aphids and European red mite. A survey of about 10 orchards last week found very low numbers of all these pests. However, mite populations can increase quickly, so monitoring at least weekly is important. Now is also a good time to check fruit for evidence of San Jose scale infestation, which may be present where early season control was not ideal.
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2025 Average Weekly Trap Captures
| HENDERSON COUNTY | |||
| Insects per trap | |||
| May 27 | Jun 2 | Jun 9 | |
| Codling moth | 6.0 | 3.5 | 1.0 |
| Oriental fruit moth | 7.0 | 15.0 | 16.5 |
| Tufted apple bud moth | 70.0 | 38.0 | 23.0 |
| Redbanded leafroller | 2.0 | 20.0 | 20.0 |
| Obliquebanded leafroller | 2.0 | 0.0 | 0.0 |
| Lesser appleworm | 4.0 | 9.0 | 4.0 |
| Apple maggot (unsprayed research orchards) | 0.0 | 0.0 | 0.0 |
| Apple maggot (abandoned orchard) | 3.0 | 3.0 | n/a |
| Brown marmorated stink bug (commercial orchards) | 0.6 | 1.0 | n/a |
| Brown marmorated stink bug (unsprayed research orchards) | 0.3 | 0.3 | 0.3 |
| Spotted tentiform leafminer | 0.0 | 1.0 | 0.0 |
| Dogwood borer | 110.0 | 58.0 | 48.0 |
| Peachtree borer | 1.5 | 8.0 | 13.0 |
| Lesser peachtree borer | 20.5 | 19.0 | 33.0 |
| San Jose scale | 0.0 | 0.0 | 0.0 |
*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 27 | Jun 2 | Jun 9 | ||
| Codling moth (Biofix: April 21) | 502 | 578 | 719 | |
| Oriental fruit moth (Biofix: March 17) | 1069 | 1175 | 1351 | |
| Tufted apple bud moth (Biofix: April 14) | 747 | 853 | 1029 | |
2025 Insect Population Trends
