WNC Orchard Insect Pest Populations – September 6, 2024
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For all practical purposes, brown marmorated stink bug (BMSB) is the only potential pest to be concerned with at this time. BMSB adult numbers in pheromone traps increased over the past week, and will likely continue to increase over the next 3 to 4 weeks. Expect to see increased flight activity of adults as they begin to seek out overwintering sites in a couple of weeks. A final pyrethroid application should be considered on fresh market cultivars that will be harvested after late September.
Unless something unusual occurs in the next few weeks, this will be the last pest update for the 2024 season.
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2024 Average Weekly Trap Captures
| HENDERSON COUNTY | |||
| Insects per trap | |||
| Aug 19 | Aug 26 | Sep 4 | |
| Codling moth | 0.5 | 0.0 | 0.0 |
| Oriental fruit moth | 12.0 | 5.5 | 23.5 |
| Tufted apple bud moth | 1.0 | 3.0 | 8.0 |
| Redbanded leafroller | 0.0 | 0.0 | 0.0 |
| Obliquebanded leafroller | 0.0 | 0.0 | 0.0 |
| Lesser appleworm | 0.0 | 1.0 | 0.0 |
| Apple maggot (research orchards) | 0.0 | 0.0 | 0.0 |
| Apple maggot (abandoned orchard) | 1.0 | 3.0 | 3.0 |
| Brown marmorated stink bug (commercial) | 1.4 | 5.0 | 17.3 |
| Brown marmorated stink bug (unsprayed research orchard) | 1.7 | 4.7 | 2.7 |
| Spotted tentiform leafminer | 0.0 | 0.0 | 0.0 |
| Dogwood borer | 58.0 | 49.0 | 33.0 |
| Peachtree borer | 14.0 | 16.0 | 5.0 |
| Lesser peachtree borer | 11.0 | 25.0 | 30.0 |
| San Jose scale | 127.5 | 40.0 | 82.5 |
*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.
2024 Accumulated Degree Days
| HENDERSON COUNTY | ||||
| Aug 19 | Aug 26 | Sep 4 | ||
| Codling moth (Biofix: April 15) | 2514 | 2656 | 2835 | |
| Oriental fruit moth (Biofix: March 15) | 3417 | 3600 | 3808 | |
| Tufted apple bud moth (Biofix: April 15) | 3123 | 3306 | 3514 | |
2024 Pest Population Trends
