WNC Orchard Insect Pest Populations – June 21, 2022

— Written By
en Español

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.

English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

Green apple aphids on apple tree shootCodling Moth: Second generation codling moth is beginning to emerge in Cleveland County and similar elevations (about 800 to 1000 ft), while at higher elevations we remain between generations. Insecticide use at this time should not be necessary in the majority of orchards in Henderson or Wilkes Counties.

Codling moth DD accumulations in Cleveland County are about 1260. While pheromone trap captures are the best indicator of activity, in orchards with low populations (i.e., no damage by first generation larvae and low pheromone trap captures), a single application timed at about 1400 DD is often sufficient for second-generation control. When choosing an insecticide to use for second generation codling moth, remember to use a product that was not used during first generation flight. In orchards using mating disruption, it is highly unlikely that insecticides are necessary for second generation codling moth.

Oriental Fruit Moth: We are in the midst of second generation flight in higher elevation orchards (Henderson and Wilkes), while second generation flight is essentially complete in lower elevation orchards. Generally second generation OFM poses little threat to apples, but trap captures have been high in several orchards this season, especially those that have not used mating disruption for several years.

Secondary Pests (Mites, Aphids, Leafhoppers): With hot temperatures returning, European red mite obviously remains a threat in many orchards. To date, aphid and leafhopper populations have been very low on apples, but keep an eye out for them as they do remain a threat.


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


2022 Average Weekly Trap Captures

HENDERSON COUNTY
Insects per trap
Jun 6 Jun 13 Jun 20
Codling moth  0.0 0.0 0.0
Oriental fruit moth 4.5 23.0 19.0
Tufted apple bud moth 3.0 1.0 0.0
Redbanded leafroller 0.0 0.0 0.0
Obliquebanded leafroller 1.0 7.0 3.0
Lesser appleworm 0.0 0.0 0.0
Apple maggot (abandoned and research orchards) set 0.0 0.0
Brown marmorated stink bug (commercial)
Brown marmorated stink bug (unsprayed) 2.5 1.5 3.0
Spotted tentiform leafminer 0.0 4.0 0.0
Dogwood borer 54.0 1.0 1.0
Peachtree borer 2.0 5.0 5.0
Lesser peachtree borer 9.0 14.0 30.0
San Jose scale 0.0 0.0 0.0
Ambrosia beetle (all species) 3.0 0.8 3.0

*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.


2022 Accumulated Degree Days

HENDERSON COUNTY
Jun 6 Jun 13 Jun 20
Codling moth (Biofix: April 22) 666 800 974
Oriental fruit moth (Biofix: April 12) 994 1162 1359
Tufted apple bud moth (Biofix: April 27) 796 964 1161

About degree-day models


2022 Pest Trends (click to enlarge)

Chart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trendsChart showing insect population trends

Written By

Jim Walgenbach, N.C. Cooperative ExtensionDr. Jim WalgenbachProfessor & Extension Entomology Specialist (Fruits / Vegetables) Call Dr. Jim Email Dr. Jim Entomology & Plant Pathology
NC State Extension, NC State University
Posted on Jun 21, 2022
Was the information on this page helpful? Yes check No close
Scannable QR Code to Access Electronic Version