Oblique-Banded Leafroller (OBLR) on Peaches

Regional Information

• Has not been a major problem since 1993.
• Historically significant potential pest especially on split pit cultivars
• Industry moving away from split pit prone varieties eg. Candor
  

Site Specific Monitoring

• Site specific monitoring may be helpful for peach in blocks adjacent to OBLR infested blocks of sweet cherry, apple and pear.
• Use of mating disruption technology to control OFM on peach/nectarine may increase risk of OBLR damage - regular monitoring required.

Monitoring Techniques Thresholds

• Monitor fruit (when looking for TPB injujry) for OBLR activity, surface feeding of fruit during growing season
• Harvest assessment.

Additional Notes

• Cyanide content of peach and nectarine leaves prevents establishment of resident populations.
• Fruit injury on peach nectarine occurs when local population pressure is high on nearby pear, apple and sweet cherry hosts.
• Apricot and plum can be alternate hosts.

Commonly Used Control Options

• Pyrethroids used for control of OFM also control of OBLR
• No special sprays recommended for OBLR in recent years
• Resistance of OBLR to organophosphates (Guthion, APM, Sniper, Imidan, etc.) is widespread on apple and pear so these products are probably no longer effective on OBLR in stone fruit.

Related Links

• OMAFRA infosheet Oblique-banded Leafroller on Apples
• Pest Complex on Peach and Nectarine in Ontario Major Pests (PDF File 16K)
• Pest Complex on Peach and Nectarine in Ontario Minor/Sporadic Pests (PDF File 15K)