Tortricidae) ON AVOCADOS, CA, NOV 1979: Insecticides were tested for efficacy against a heavy infestation of late instar A. cuneana larvae on 5-yr-old avocado trees (20 ft x 20 ft spacing) located in Ventura County, CA. A randomized block experimental design was used with 6 replicates of 2 trees each. Treatments were applied over a 3-day period (Nov 27, 28, and 29) by hand-gun with an FMC hydraulic orchard spray rig at 400 psi to run-off (4 gal/tree = 400 gal/acre). An unsprayed buffer tree separated treated trees both within and between rows. Treatments were evaluated by examining 10 randomly selected A. cuneana nests/tree for live larvae. Only nests between 1 and 6 feet above ground were checked. Data were subjected to analysis of variance after transformation to x.

A six-and-a-half day irradiation of enriched Mo-100 target disks was performed by Argonne's electron linac. This report describes the irradiation conditions and the means used to process the targets for shipment to NorthStar Medical Isotopes, LLC, for feed to their RadioGenix TM technetium generator.

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Abstract. An investigation was made into an illness episode characterized by cholinesterase depression and cholinergic symptoms reported among 118 field workers harvesting grapes treated with Torak | (dialifor) and Zolone | (phosalone) in a vineyard near Madera, California. Dialifor had been applied at the rate of 1.0 pound per acre in 30 gallons of water between 15 and 40 days earlier using a Kinkelder air blast sprayer. Dissipation studies in an earlier study in Soledad, California, using concentrated spray resulted in initial dislodgeable residues of 2.1 ug/cm 2 with a half-life of 14 to 15 days. A similar level of dislodgeable residue resulted at the time of application in the vineyard at Madera. Dislodgeable residues as high as 0.7 ug/cm 2 were encountered by workers at the time of entry with most residues being in the range of 0.11 to 0.45 ug/cm 2. Residue of dialifor on the foliage in 36 other grape vineyards in the San Joaquin Valley were determined at the time of harvest and were shown to be 0.13 ug/cm 2 or less. In four of the 36 vineyards, blood was obtained from workers harvesting grapes. None of the field workers had blood cholinesterase values outside control values.The investigation indicated that with initial dislodgeable residues of dialifor as high as 2.3 ug/cm 2, a period of at least 65 days is required before a possibly safe level of something less than 0.06 ug/cm 2 is reached. The analysis of the residues in the 36 other vineyards indicated that the initial deposits and/ or the half-life of dialifor varied considerably throughout the San Joaquin Valley. Because of this variation, the use of reentry intervals for dialifor may require replacement by on-site residue tests prior to entry. The results indicated that phosalone residues were not responsible for the illness in the field workers.