WNC Orchard Insect Pest Populations – April 22, 2024
go.ncsu.edu/readext?1000068
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 ▲Petal Fall Sprays and Upcoming Insect Pests:
The cool weather this week has slowed development and activity of key pests targeted at petal fall. This will expand the window for optimum timing of applications until this weekend or early next week.
Target pests at petal fall include plum curculio, oriental fruit moth (OFM) and, if not controlled before bloom, rosy apple aphid. If mating disruption for codling moth and OFM was deployed before OFM started to fly about the third week of March, insecticidal control may not be necessary. The relative efficacy of insecticides recommended at petal fall are shown in the table below. Note that all insecticides recommended at bloom are toxic to bees, so delay petal fall sprays on those cultivars still in heavy bloom, most likely Romes.
Looking ahead over the next couple of weeks, pests to plan for include San Jose scale between petal fall and first cover, preventive control of European red mite and codling moth.
Relative Efficacy of Insecticides for Petal Fall
( ─ no activity, 1 = least effective, 5 = most effective)
Insecticide (activeingredient |
Plum Curculio |
Oriental Fruit Moth |
Rosy Apple Aphid |
Toxicity to Bees |
| Actara (thiamethoxam) | 5 | 2 | 5 | Highly Toxic |
| Assail (acetamiprid) | 3 | 4 | 5 | Moderately Toxic |
| Belay (chlothianidin) | 4 | 3 | 5 | Highly Toxic |
| Avaunt (Indoxacarb) | 4 | 4 | ─ | Highly Toxic |
| Imidan (phosmet) | 4 | 4 | ─ | Highly Toxic |
| Verdepryn (cyclaniliprole) | 4 | 5 | ─ | Highly Toxic |
| Sevin (carbaryl) | 3 | 3 | ─ | Highly Toxic |
| Voliam Flexi (thiamethoxam + chlorantraniliprole) |
5 | 5 | 5 | Highly Toxic |
Learn more about southeastern apple insect pests at the Apple Insect Management page.
2024 Average Weekly Trap Captures
| HENDERSON COUNTY | |||
| Insects per trap | |||
| Apr 8 | Apr 15 | Apr 22 | |
| Codling moth | 0.0 | 0.5 | 4.5 |
| Oriental fruit moth | 108.5 | 103.0 | 60.0 |
| Tufted apple bud moth | 0.0 | 2.0 | 3.0 |
| Redbanded leafroller | 2.0 | 2.0 | 4.0 |
| Obliquebanded leafroller | setup | 0.0 | 0.0 |
| Lesser appleworm | setup | 0.0 | 0.0 |
| Apple maggot (abandoned and research orchards) | – | – | – |
| Brown marmorated stink bug (commercial) | setup | 1.0 | 0.7 |
| Brown marmorated stink bug (unsprayed) | setup | 0.0 | 0.0 |
| Spotted tentiform leafminer | 2.0 | 2.0 | 2.0 |
| Dogwood borer | 0.0 | 0.0 | 0.0 |
| Peachtree borer | 0.0 | 0.0 | 0.0 |
| Lesser peachtree borer | 0.0 | 3.0 | 4.0 |
| 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.
2024 Accumulated Degree Days
| HENDERSON COUNTY | ||||
| Apr 8 | Apr 15 | Apr 22 | ||
| Codling moth (Biofix: April 15) | – | biofix | 77 | |
| Oriental fruit moth (Biofix: March 15) | 188 | 288 | 401 | |
| Tufted apple bud moth (Biofix: April 15) | – | biofix | 107 | |
2024 Pest Population Trends
