WNC Orchard Insect Pest Populations – June 29, 2021
go.ncsu.edu/readext?806093
en Español / em Português
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.
Português
Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.
Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.
English
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 ▲Codling Moth: Except for second-generation codling moth in lower elevation orchards (less than about 1200 ft elevation), insect activity remains low at this time. In the Cleveland/Lincoln County area about 1475 DD have accumulated since biofix, and now is the optimum timing for control of the second generation.
Remember that good resistance management practices call for using an insecticide with different modes of action against the first and second generations. The two most effective groups remain MOA group 28, the diamides (i.e., Altacor, Verdepryn, Voliam Felxi, Besiege), and MOA group 5, the Spinosyns (i.e., Delegate). Hence, if a diamide was used against the first generation, Delegate should be used against the second generation. Alternatively, if Delegate was used against the first generation then a diamide should be used against the second.
In Henderson County and other locations of similar elevation (≥2000 ft), only about 1050 DD have accumulated since codling moth biofix. These areas are still about two weeks from the need for an insecticide targeting the second generation.
Aphids, Leafhoppers and Mites: With shoot growth foliage now hardening off, leafhoppers and green aphid populations are declining and insecticidal control should no longer be necessary. Also, if European red mites have not developed to threshold levels by the end of June, they usually will not be an issue the remainder of the year. However, with increased pyrethroid use for brown marmorated stink bug in recent years, it would be wise to continue to scout for this pest.
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2021 Average Weekly Trap Captures
HENDERSON COUNTY | |||
Insects per trap | |||
Jun 14 | Jun 21 | Jun 28 | |
Codling moth | 2.0 | 1.0 | 2.5 |
Oriental fruit moth | 17.0 | 34.0 | 36.0 |
Tufted apple bud moth | 2.0 | 4.0 | 1.0 |
Redbanded leafroller | 0.0 | 2.0 | 0.0 |
Obliquebanded leafroller | 18.0 | 21.0 | 2.0 |
Lesser appleworm | 0.0 | 0.0 | 2.0 |
Apple maggot (abandoned and research orchards) | 0.0 | 0.0 | 0.0 |
Brown marmorated stink bug (commercial) | 1.0 | 1.8 | 1.7 |
Brown marmorated stink bug (unsprayed) | 7.5 | 2.0 | 4.0 |
Spotted tentiform leafminer | 20.0 | 20.0 | 27.0 |
Dogwood borer | 38.0 | 6.0 | 27.0 |
Peachtree borer | 6.0 | 6.0 | 18.0 |
Lesser peachtree borer | 52.0 | 48.0 | 25.0 |
San Jose scale | 0.0 | 0.0 | 2.5 |
*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.
2021 Accumulated Degree Days
HENDERSON COUNTY | ||||
Jun 14 | Jun 21 | Jun 28 | ||
Codling moth (Biofix: April 10) |
792 | 927 | 1100 | |
Oriental fruit moth (Biofix: March 27) |
1183 | 1353 | 1571 | |
Tufted apple bud moth (Biofix: April 30) |
824 | 994 | 1212 |
2021 Pest Trends (click to enlarge)
Visit WNC Orchard Insect Populations for archived posts.