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Three-year spray program to control blue oak.

December 1959
Volume 13, Number 12

Research articles

Aircraft spraying of blue oak: Phenoxy herbicides found most effective when applied in May for three successive years, followed by ground-rig clean up

by O. A. Leonard, C. E. Carlson

Abstract

Conversion from brush to forage land may be aided by a broadcast spray that can kill most of the woody plants.

Ozone stipple of grape leaf: Lesions on the upper leaf surfaces and premature leaf fall occur on grapevines in areas polluted by air-borne ozone

by B. L. Richards, John T. Middleton, W. B. Hewitt

Abstract

Grape leaf stipple occurs in the vicinity of Los Angeles and San Francisco.

Semen quality in beef bulls: Tests with young and older bulls, based on percentages of living, motile, and abnormal sperm and breeding efficiency

by P. T. Cupps, B. McGowan, D. F. Rahlmann

Abstract

Poor quality semen can be produced by bulls of any age, but recovery in 3-6 months was found in nearly half of such bulls that could be retested.

Spray for soil erosion control: Surface spray of polyvinyl alcohol stabilizes soils on banks or lawn area without injury to plants or to seed germination

by John J. Stark

Abstract

Tests with Elvanol, grade 71-30, indicate that the material might replace straw and wire for control of water or wind erosion. It has been applied on newly seeded lawn areas and on previously planted" banks without apparent plant injury or reduction of seed germination.