California’s almond and pistachio orchards stretch across more than 1.5 million acres, a lot of ground for a moth whose damage can begin inside the nut. That scale is one reason navel orangeworm has become a recurring target for researchers and growers alike. The pest affects more than 1.5 million acres of almonds and pistachios, according to National Nut Grower.
For almond operations, the problem is not simply finding an insect in the orchard. Navel orangeworm can severely reduce crop quality and marketability, turning sound nuts into a sorting, processing, and sales problem. The pest is especially unwelcome at the point where a crop’s value is supposed to become fairly obvious: after harvest, when the shells are opened and the damage is counted.
A Biological-Control Bet
The Foundation for Food & Agriculture Research and the Almond Board of California have awarded $4,994,419 to develop biological control methods for navel orangeworm. The funding is aimed at a new control project for California’s nut industry, with the work focused on finding a tool that can fit into the complicated pest-management calendar of tree nuts.
The project is being developed with Flyttr, which is pursuing a biological control for navel orangeworm in almonds and pistachios. Biological control is a patient form of pest management: rather than reaching for another conventional treatment, researchers look for an organism or biological mechanism that can suppress the pest without adding another broad chemical pass to the orchard.
Useful, If It Reaches the Orchard
That distinction matters to almond growers because a promising laboratory result is not yet an orchard tool. A biological control has to work at commercial scale, fit harvest and sanitation practices, and perform under California’s uneven mix of orchard ages, varieties, weather, and pest pressure. The grant creates room to test those questions; it does not create a new treatment recommendation.
The research also lands in a state where pest-control programs depend on more than one lever. Orchard monitoring, timely harvest, removal of mummy nuts, and existing control measures remain separate parts of the navel-orangeworm problem. A new biological method would be most useful if it could join that system rather than asking growers to replace it wholesale.
For now, the practical story is one of research moving toward the orchard, not a product arriving at the shed. The next useful evidence will be field performance, how the method fits existing almond programs, and whether regulators eventually clear it for commercial use. FFAR described the effort as targeting one of California’s most destructive tree-nut pests, but the public announcements do not yet provide a field-trial schedule or product-registration date.