Buck Moth Caterpillars Expected to Surge This Spring in Louisiana

As spring approaches, residents of New Orleans should be prepared for a significant emergence of buck moth caterpillars. Reports indicate that an unusually high population of adult buck moths has been spotted in the area since mid-December. This surge suggests that a large outbreak of their caterpillars is likely to occur in the coming weeks.

The life cycle of the buck moth is particularly fascinating. During late November through December, the adult moths, characterized by their charcoal black-and-white wings and rusty orange abdomens, emerge from underground. Having spent the summer in a resting stage, these moths mate shortly after emerging, with females laying clusters of approximately 80 to 100 eggs on the twigs of oak trees, primarily live oak and water oak.

Hatching typically begins in mid- to late-February in southern Louisiana. The newly hatched caterpillars immediately begin to feed on the leaves of oak trees. Within six to eight weeks after hatching, these spiny caterpillars can grow to about three inches in length and will seek to pupate in the ground. Their movement can lead them onto lawns, sidewalks, and porches, creating a potential for painful stings when encountered by humans or pets.

Given this cyclical pattern, residents are advised to take precautions. This year, due to the unusually large adult population, experts recommend spraying trees in March to deter the caterpillars before they begin their descent. For those with live oaks in their yards, particularly if they experienced a significant presence of caterpillars last spring, contacting a commercial tree service for treatment may be a prudent step.

In addition to dealing with the buck moths, homeowners often have questions about other gardening concerns during this time of year. For instance, one resident, Brittiany, inquired about pruning azaleas. Gardening experts confirm that azaleas generally respond well to hard pruning and can be cut back by about half after their flowering period. This practice encourages new growth and helps maintain their shape.

Another resident, Richard, asked about the timing of fertilization for trees, shrubs, and ground covers. Experts advise against fertilizing during dormancy, suggesting that trees should be fertilized in February and shrubs in March or April for optimal growth.

As spring approaches, residents of New Orleans are reminded to be vigilant regarding the emergence of buck moth caterpillars. By taking early action and remaining informed, they can better manage this cyclical phenomenon and ensure a safe environment for their families and pets.