A proposed biological control release has brought the threat to native US prickly pear cacti into focus. In its September 10, 2026 program update, USDA’s Animal and Plant Health Inspection Service (APHIS) said it was reviewing a request to release Apanteles opuntiarum, a parasitoid wasp, against the invasive cactus moth, Cactoblastis cactorum.
APHIS describes the moth as a serious threat to native Opuntia species in the United States. The agency has posted a summary of the request for a 30-day public review period ending October 10, 2026. The announcement concerns a proposed release under review; it does not announce an approved release or report results from a completed control programme.
Why the host and distribution records matter
The EPPO Global Database overview identifies the pest as Cactoblastis cactorum, also known as the cactus moth or prickly pear moth, under code CACTCA. Its host records list both Opuntia and Opuntia ficus-indica as major hosts. These records provide context for the concern about native cacti expressed in the APHIS notice.
EPPO’s distribution records describe the moth as present in the United States with restricted distribution nationally. The listed states include Alabama, Florida, Georgia, Hawaii, Louisiana, South Carolina and Texas. That database snapshot should be read alongside the national consultation: the consultation is about a proposed biological control agent, while the distribution record describes where the target pest has been recorded. Neither establishes a new outbreak at a particular growing site.
The US categorization is: Quarantine pest (United States of America, listed since 1989; EPPO Global Database categorization). This categorization provides regulatory background to the pest story. It is separate from the decision APHIS is considering on the proposed parasitoid release, and does not establish the outcome of that review.
Where semiochemical research fits
For people considering cactus moth detection and monitoring in Opuntia-growing areas, the consultation raises a distinct research question: what semiochemical evidence could support a monitoring programme? The APHIS update addresses a parasitoid release proposal. It does not provide a pheromone formulation, specify a monitoring lure or establish the performance of a semiochemical product.
A semiochemical literature review can therefore be framed around the monitoring question without assuming a particular compound or lure is ready for use. Any candidate pheromone or attractant synthesis inquiry would remain an inquiry into a candidate. It should not be presented as evidence that a working cactus moth lure has already been developed or validated.
ECOPHERO support for a defined monitoring question
ECOPHERO has no catalog-listed product targeting Cactoblastis cactorum or the genus Cactoblastis. Its support for this pest is capability-led: semiochemical literature review, candidate pheromone or attractant synthesis inquiry, analytical verification, and monitoring-program design and field-validation coordination.
These capabilities provide a basis for discussing a research requirement. A team could begin by defining its cactus moth monitoring question and requesting a literature review. If it wishes to pursue a candidate pheromone or attractant, synthesis inquiry and analytical verification can form part of that discussion. Monitoring-program design and field-validation coordination are also available within this support scope. None of these services establishes field performance for a particular candidate.
Keep the consultation and monitoring decisions distinct
The immediate dated milestone in the APHIS announcement is the October 10, 2026 close of the public review period. Readers following the release proposal should use the agency’s notice as the starting point for understanding that consultation. The EPPO host, distribution and categorization pages supply background on the target pest; they do not constitute approval of the proposed agent.
For an Opuntia monitoring project, a useful starting brief is the pest name, the area of interest and the monitoring question to be explored. That gives a capability discussion a concrete purpose while leaving candidate selection and field performance open to investigation. Contact ECOPHERO with Cactoblastis cactorum and your monitoring challenge to discuss the available support.
Sources
- USDA APHIS Program Update
- EPPO Global Database - Cactoblastis cactorum (CACTCA) Overview
- EPPO Global Database - CACTCA Categorization (quarantine pest listings)
- EPPO Global Database - CACTCA World distribution
- EPPO Global Database - CACTCA Host plants
- EPPO Global Database - CACTCA Reporting Service articles
- Image: Peggy Greb, USDA Agricultural Research Service. Original image. License: Public domain.
