Black Olive Caterpillar Diagnostic Guide
Black olive caterpillar (Characoma niloticafeed) feeds on flowers and leaves of black olive trees. The larvae’s droppings can also be a nuisance. Low populations of black olive caterpillar do not cause extensive damage. However, high populations, skeletonizing feeding of late instars can ‘brown out’ trees, and cause them to defoliate. Multiple years of damage can negatively affect the health an already stressed tree
Trees at Risk
Black olive and buttonwood.
Signs of Damage
- Flowers of black olive are consumed, followed by skeletonization of canopy.
- Staining due to frass under affected trees.
Only in severe cases of infestation is treatment warranted.
Treatment Strategy Expected Results
- Soil injections of Lepitect will begin efficacy within 3-10 days for most pests. Control on larger trees will not occur as quickly (2-3 weeks). Lepitect soil applications last for 30 days after treatment. Repeat applications may be necessary if pest activity persists for longer than 30 days.
- Conserve has a short residual (4-7 days) but is softer on beneficial insects, whereas Tengard will provide slightly longer residual, but is broad spectrum.
- Trials by Davey displayed excellent season-long control with the use of Aracinate.
A Diagnostic Guide is designed to help you identify a pest issue and management solutions. Always refer to product label for all rates and approved uses. Some images courtesy forestryimages.org. Use of the images does not imply endorsement of treatments by forestryimages.org