OX513A is a bisex RIDL strain. Males are released to mate with wild females. The progeny of such matings die as late larvae or pupae. Continual releases of sufficient numbers of RIDL males will reduce the target population to below the level needed to transmit disease. The late lethality means that RIDL larvae compete with wild-type larvae for resources,adding to the overall effectiveness of control. Before release, male and female pupae are separated mechanically, exploiting the fact that they are naturally significantly different in size. The strain contains the DsRed marker which is clearly visible in larvae, a useful tool for quality control in production and effective monitoring in the field. OX513A is available in Asian and Latin American genetic backgrounds.
OX513A has regulatory approvals for import and contained testing in Brazil, Cayman Islands, France, India, Malaysia, Singapore, Thailand, USA and Vietnam. Open field trials have taken place in both Grand Cayman and Malaysia, and are currently also underway in Brazil.