WNC Orchard Insect Pest Populations – June 21, 2023
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Across the region, we are in a period where the three major direct pests (codling moth, oriental fruit moth and tufted apple bud moth) pose little threat of damage to apples. This assumes that an insecticide effective against TABM has been applied in the past 10 (Henderson County and similar elevations) to 17 days (Cleveland County and similar elevations).
As mentioned in last week’s update, secondary pests that can be controlled using curative sprays, including green apple aphid, potato leafhopper, Japanese beetle, and European red mite are most common at this time. However, the cool and wet weather over the next few days will likely impede population growth of these pests.
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2023 Average Weekly Trap Captures
| HENDERSON COUNTY | |||
| Insects per trap | |||
| June 5 | June 12 | June 19 | |
| Codling moth | 0.5 | 0.0 | 0.5 |
| Oriental fruit moth | 10.5 | 13.5 | 17.5 |
| Tufted apple bud moth | 14.0 | 12.0 | 1.0 |
| Redbanded leafroller | 10.0 | 8.0 | 0.0 |
| Obliquebanded leafroller | 3.0 | 7.0 | 2.0 |
| Lesser appleworm | 2.0 | 4.0 | 0.0 |
| Apple maggot (abandoned and research orchards) | 0.0 | 0.0 | 0.0 |
| Brown marmorated stink bug (commercial) | – | – | – |
| Brown marmorated stink bug (unsprayed) | 1.0 | 0.3 | 0.3 |
| Spotted tentiform leafminer | 0.0 | 0.0 | 0.0 |
| Dogwood borer | 36.0 | 18.0 | 19.0 |
| Peachtree borer | 8.0 | 0.0 | 2.0 |
| Lesser peachtree borer | 2.0 | 3.0 | 1.0 |
| 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.
2023 Accumulated Degree Days
| HENDERSON COUNTY | ||||
| June 6 | June 12 | June 19 | ||
| Codling moth (Biofix: April 7) | 623 | 716 | 829 | |
| Oriental fruit moth (Biofix: March 24) | 1050 | 1176 | 1323 | |
| Tufted apple bud moth (Biofix: April 21) | 697 | 823 | 970 | |
2023 Pest Population Trends
