Robert’Orpet,PhDStudent,[email protected]’...
Transcript of Robert’Orpet,PhDStudent,[email protected]’...
Woolly apple aphidsRobert Orpet, PhD Student, [email protected] (Advisors: Drs. Vince Jones and David Crowder)
Wenatchee Tree Fruit Research and Extension Center
What is the economic effect?
• Difficult to measure!• Sooty mold• Galls• Blind wood
E. Beers E. Beers
What is the economic effect?
• Difficult to measure!• Sooty mold• Galls• Blind wood• Nuisance
E. Beers
Woolly apple aphid lifecycle
• Females exist on apple year-‐round• Give live birth to clones of themselves• Move in and out of soil
• Sexual lifecycle involves elm• Unknown relevance in WA
How to manage organically?
• Conventional apples use Diazinon, Lorsban, Ultor
• Organic management:• Biological control• Scion and rootstock genetics
Biological control is important
No natural enemies
Parasitoid only.
Parasitoid + predators
From Gontijo, Beers, and Snyder. Biological Control 90: 83-‐91
Apple interviews and surveys
• Talk to me if interested in in-‐depth in-‐person interview
• This will help guide future research and extension involving woolly apple aphids and with earwigs• Anybody who works with apples can participate
Conclusion
• Woolly apple aphids• Feed above and belowground year-‐round
• Biological control• Syrphids can be attracted with sweet alyssum• Earwigs are beneficial
• Genetics• Fuji is especially susceptible• Consider woolly aphid resistant Geneva rootstocks