Orange tortrix
Argyrotaenia franciscana
17 host plants
Last updated
Data Coverage 1 of 6 dimensions
You will find small reddish-orange caterpillars rolling or folding leaves of their host plants and feeding within the shelter. Adult moths are orange to tan with distinctive wing markings and appear in spring. Larvae are tan to green and cause leaf distortion and binding. Host plants include Oregon grape, Japanese holly, and various ornamental shrubs susceptible to this generalist leaf-roller.
Remove rolled leaves by hand during the growing season if populations are light. Prune heavily infested shoots to reduce damage and improve appearance. Time spray applications for late spring when larvae are binding leaves. Encourage parasitic wasps by avoiding broad-spectrum insecticides.
Quick Reference
Order
Lepidoptera
Type
chewing-insect
Host Plants
17
Cultural Controls
- Hand-pick and destroy rolled leaves, or pinch to kill caterpillars inside.
- Prune out webbing, if desired.
- Provide proper culture. Healthy plants can easily tolerate some defoliation.
- Very low temperatures in winter significantly reduce overwintering populations.
- Removal of overwintering sites, such as rolled leaves on the ground or plastered to canes, can reduce next year's population.
- Proper pruning and training of canes can reduce leafroller populations.
Host Plants (17)
Atriplex hymenelytra Desert Holly Berberis aquifolium Oregon Grape, Oregon Grape Holly, Tall Oregon Grape Berberis pinnata California Barberry, California Holly Grape Grevillea aquifolium Holly, Grevillea Heteromeles arbutifolia Toyon Christmasberry California Holly Ilex aquifolium English Holly Ilex attenuata Ilex attenuata Ilex cornuta Chinese Holly, Horned Holly Ilex crenata Japanese Holly Ilex glabra Inkberry Inkberry Holly, Gallberry, Evergreen Winterberry Ilex latifolia Lusterleaf Holly Ilex meserveae Meserve Hybrid Holly Ilex paraguariensis Yerba Matá, Maté, Paraguay Tea Ilex verticillata Winterberrry Winterberry Holly, Michigan Holly, Christmas Berry Black Alder Olearia macrodonta Daisy, Bush, New Zealand Holly Osmanthus heterophyllus Holly Osmanthus Holly-leaf Osmanthus, Holly Tea Olive Quercus ilex Holly, Oak, Holm Oak