USDA Provides $4M to Combat Invasive Pest in California

The glassy-winged sharpshooter is not a tiny speck hiding under a leaf. At roughly half an inch long, the leafhopper is large enough to notice as it feeds from a plant’s xylem—the plumbing tissue that carries water upward. That feeding habit gives it an efficient route for moving trouble through a crop.

The trouble is Pierce’s disease, which can kill grapevines, and the pest is difficult and expensive to control once it settles in. CDFA describes the sharpshooter as a serious disease-spreading threat because stopping an early find is cheaper than chasing an established population.

A Pest That Travels With Plant Material

The new federal support is being directed to the California Department of Food and Agriculture, which coordinates much of the state’s response with county agricultural commissioners. The decision follows a July rejection of a request from Sens. Alex Padilla and Adam Schiff for $32 million in emergency assistance, according to reporting on the federal funding decision.

The work on the ground is practical and unglamorous: inspect likely pathways, remove infested material, and put more traps in places where the insect has a better chance of getting established. Those steps are the core of the expanded response described in the funding announcement.

The Expensive Part Is Finding the Edges

California already has areas where the sharpshooter is generally present, but the more consequential fieldwork happens at the edges. CDFA and county officials are conducting eradication efforts in El Dorado, Sacramento, Santa Clara, Shasta and Solano counties, according to a UC Agriculture and Natural Resources account.

For vineyards, the concern is not limited to the insect’s presence in a trap. An unchecked population can bring disease pressure, declining production and the cost of replacing vines. Grower representatives told a UC Davis panel that the economic exposure for the wine industry could reach tens of millions of dollars annually if trapping and treatment remain inadequate, The Press Democrat reported.

That makes the response relevant beyond vineyards. The sharpshooter can move through a state where nursery stock, cuttings, equipment and harvested material routinely cross county lines; a detection in one region can become a paperwork problem—and then a production problem—for another.