Excerpt from:

Federal Register: July 6, 2000 (Volume 65, Number 130)
40 CFR Part 180; [OPP-301008; FRL-6590-1]; RIN 2070-AB78
Online at: https://www.federalregister.gov/documents/2000/07/06/00-17043/tebufenozide-pesticide-tolerances-for-emergency-exemptions

Tebufenozide; Pesticide Tolerances for Emergency Exemptions
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.

… III. Emergency Exemption for Tebufenozide on Grapes and FFDCA Tolerances

Grapes are California’s number one ranked crop in dollar value, accounting for over 90% of the grapes grown in the United States. The European export market for California wines accounts for well over $250 million. The Grape Leaf folder causes injury in the larval stages by rolling and feeding on the leaves, reducing photosynthetic function. The Omnivorous leaf roller directly reduces grape yields by injuring the flowers and developing berries it feeds on. The Omnivorous leaf roller also allows entry of bunch rot organisms that damage entire clusters which may result in rejection at the winery.

Cryolite is the registered alternative most often used to control both Grape Leaf folders and Omnivorous leaf rollers. However, for the 2000 crop year, nearly all major California wineries with export markets have advised their growers that they will not accept grapes which have been treated with cryolite or any other product which would affect the level of fluorides in wine. The European Community recently established strict tolerance levels of 1 ppm with respect to fluoride residues.There is a direct correlation between even limited use of cryolite on wine grapes which can result in fluoride levels in wine above 3 ppm.Therefore, the State claims that there is no feasible registered alternative available to wine growers to control these pests. EPA has authorized under FIFRA section 18 the use of tebufenozide on grapes for control of Omnivorous leaf roller and Grape leaf folder in California. After having reviewed the submission, EPA concurs that emergency conditions exist for wine grapes for the State. However, the Agency does not believe that an urgent and non-routine finding can be made for table grapes since growers can still use cryolite….