The Citrus Research Board announced on Apr. 22 the launch of a new biological control program in Ventura County, aiming to suppress Asian citrus psyllid (ACP) populations through the use of Tamarixia radiata. The initiative will focus on approximately 2,000 acres of commercial citrus and seeks to create a coordinated network among participating groves.
The effort is significant because ACP is known as the only vector for Huanglongbing (HLB), a disease that poses major threats to citrus crops. By using Tamarixia radiata, a natural enemy of ACP, the program aims for long-term suppression rather than repeated short-term interventions.
Participating blocks will be equipped with field-based systems that produce and release Tamarixia directly into orchards. These systems use curry leaf plants to support ACP reproduction without risking HLB transmission, while fine mesh cages allow Tamarixia to disperse into surrounding trees. Monthly maintenance visits ensure ongoing production and monitoring, with results shared regularly with growers throughout the season.
The program prioritizes organic and low-input integrated pest management groves but also considers conventional sites. Growers who participate will receive reimbursement for enrolled acreage and additional support for ant control, since Argentine ants can reduce Tamarixia effectiveness. Annual drone imagery will be used to assess canopy conditions across participating areas.
University of California Agriculture and Natural Resources supports such sustainable practices by promoting resilient ecosystems and economic vitality according to its official website. The organization operates nine research and extension centers representing California’s diverse ecosystems according to its official website, conducts over 33,800 educational events annually with more than 18,400 volunteers according to its official website, and manages Cooperative Extension services as part of the University of California system according to its official website.
Applications for participation are now open at https://citrusresearch.org/growers-application and will remain available until all sites are filled or within one or two months.