Exterior white latex paint applied to trunks of young trees before flatheaded borer eggs were deposited, but after bud break, prevented sunburn and reduced borer attacks—and was as effective as any other material tested in these studies.

Assistance with plot and laboratory work was obtained from Hillary Ewing, Laboratory Assistant, U.C., Berkeley. Orchard space, storage space and assistance with plot work were furnished by Mel Nunes and Ed Sarmento, Sutter County ranchers. The above work was supported in part by the United States Public Health Service Grant U1535–03, Solid Waste Program, Environmental Control Administration, National Center for Urban and Industrial Health.