WNC Orchard Insect Pest Populations – August 20, 2024

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Brown marmorated stink bug nymphBrown marmorated stink bug (BMSB) remains the key pest of concern. As of August 20, about 45% and 63% of F1 adults have emerged in Henderson and Cleveland Counties, respectively. Numbers captured on pheromone traps have been relatively low thus far, but with only 45% emerged in Henderson County, captures are expected to increase over the coming weeks. As a reminder, those cultivars harvested after Labor Day are most susceptible and should be the focus of insecticide sprays.

Other pests that could be a problem include apple maggot, oriental fruit moth, and codling moth. Pyrethroid sprays for BMSB will also control these insects.


Learn more about southeastern apple insect pests at the Apple Insect Management page.


2024 Average Weekly Trap Captures

HENDERSON COUNTY
Insects per trap
Aug 5 Aug 12 Aug 19
Codling moth 0.5 2.5 0.5
Oriental fruit moth 11.0 15.5 12.0
Tufted apple bud moth 0.0 11.0 1.0
Redbanded leafroller 0.0 0.0 0.0
Obliquebanded leafroller 2.0 7.0 0.0
Lesser appleworm 0.0 0.0 0.0
Apple maggot (research orchards) 0.0 0.0 0.0
Apple maggot (abandoned orchard) 2.0 6.0 1.0
Brown marmorated stink bug (commercial) 1.3 0.7 1.4
Brown marmorated stink bug (unsprayed research orchard) 0.3 0.7 1.7
Spotted tentiform leafminer 0.0 0.0 0.0
Dogwood borer 18.0 45.0 58.0
Peachtree borer 14.0 14.0 14.0
Lesser peachtree borer 4.0 10.0 11.0
San Jose scale 5.0 5.0 127.5

*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 5 Aug 12 Aug 19
Codling moth (Biofix: April 15) 2184 2347 2514
Oriental fruit moth (Biofix: March 15) 3017 3215 3417
Tufted apple bud moth (Biofix: April 15) 2723 2921 3123

About degree-day models


2024 Pest Population Trends

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