WNC Orchard Insect Pest Populations – September 28, 2020

— Written By and last updated by

Apples on a table in an orchard

The last full pest report was September 8, but traps will continue to be checked and the numbers updated until insect populations approach zero. Most pests are continuing to decline in number.

The full September 8 pest report can be seen on our website. All previous 2020 pest reports can be found by scrolling down this page.


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


2020 Average Weekly Trap Captures

HENDERSON COUNTY
Insects per trap
Sep 14 Sep 21 Sep 28
Codling moth  0.1 0.0 0.0
Oriental fruit moth 4.4 1.8 2.1
Tufted apple bud moth 0.0 0.0 0.0
Redbanded leafroller 0.0 0.0 0.0
Obliquebanded leafroller 0.0 0.0 0.0
Lesser appleworm 0.0 0.0 0.0
Apple maggot (abandoned and research orchards) 1.3 0.3 0.0
Brown marmorated stink bug (commercial) 4.3 1.7 3.5
Brown marmorated stink bug (unsprayed) 33.2 12.0 6.5
Spotted tentiform leafminer 0.0 0.0 0.0
Dogwood borer 12.0 2.0 0.0
Peachtree borer 22.0 5.0 1.0
Lesser peachtree borer 29.0 3.0 0.0
San Jose scale 7.5 20.0 10.0

*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.


2020 Accumulated Degree Days

HENDERSON COUNTY
Sep 14 Sep 21 Sep 28
Codling moth (Biofix 4/20) 2713 DD 2806 DD 2880 DD
Oriental fruit moth (Biofix 3/30) 3598 DD 3725 DD 3831 DD
Tufted apple bud moth (Biofix 4/27) 3340 DD 3467 DD 3573 DD

About degree-day models


2020 Pest Trends (click to enlarge)

Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends Graph showing insect population trends


Visit WNC Orchard Insect Populations for archived posts.


Additional Resources

Written By

Jim Walgenbach, N.C. Cooperative ExtensionDr. Jim WalgenbachProfessor & Extension Entomology Specialist (Fruits / Vegetables) Call Dr. Jim E-mail Dr. Jim Entomology & Plant Pathology
NC State Extension, NC State University
Updated on Sep 28, 2020
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