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.

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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)

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