California Agriculture, March 1949
Volume 3, Number 3
Two-spray program for codling moth in walnuts
Payne walnuts: Codling moth investigations in northern California and recommendations for 1949
by A. E. Michelbacher , W. W. Middlekauff , Donald Davis
Not available – first paragraph follows: Throughout Northern California the codling moth infestation in 1948 was much more serious than that encountered in any recent year. The cause of this is not known although it may have been associated in part with the lateness of the season.
Alfalfa caterpillar tests: Biological control by artificial spread of virus disease studied
by Edward A. Steinhaus , Clarence G. Thompson
Not available – first paragraph follows: Exploratory tests conducted in the summer of 1948 suggest the possible use of a virus as a means of biological control of the alfalfa caterpillar.
Citricola scale enemies: Balance of scale and parasite required
by Paul DeBach
Not available – first paragraph follows: The citricola scale,Coccus pseudo-magnoliarum Green, increased in numbers in 1948 in western Riverside and San Bernardino counties. It disappeared from economic consideration in those areas during the winter of 1933-34 and remained relatively unimportant until 1947 when it began its current build-up.
Baker mealybug: Use of green lacewing in control studied
by R. L. Doutt , K. S. Hagen
Not available – first paragraph follows: Biological control of Baker mealybug on pears was studied during 1948 in experimental work carried out in conjunction with the normal spray program.
Wide range of damage result of early '49 cold: Eight preliminary reports indicate tree and crop losses varied from slight to severe
Not available – first paragraph follows: The recent major freeze caused severe injury to both crop and trees of many subtropical evergreen fruit trees of the State.
California red scale: Studies in possible control by employment of natural enemies
by Paul DeBach , C. A. Fleschner , E. J. Dietrick
Not available – first paragraph follows: California red scale,Aonidiella aur-antii—the most important pest of citrus-is attacked by several natural enemies, principally the golden chalcid, the lindorus ladybird and the twice-stabbed ladybird.
Castor beans: Studied for potential values as oil crop for California production
by P. F. Knowles
Not available – first paragraph follows: Approximately 300 million pounds of castor beans were imported during each of the past eight years.
New asparagus: Two new strains of the Mary Washington produce tight spears of uniform color
by G. C. Hanna
Not available – first paragraph follows: Two new strains of Mary Washington asparagus—numbers 499 and 500—have been developed by the Division of Truck Crops and released to growers for trial.
Small lots thresher: Compact and easily cleaned suitable for small sized seeds
by Glen N. Davis
Not available – first paragraph follows: A machine that will thresh parts of a plant, individual plants, or a small number of plants and is particularly adapted to obtaining onion and carrot seed has been developed by the Division of Truck Crops.
Horses: Stomach worms controlled
by C. E. Howell
Not available – first paragraph follows: Internal parasites—such as stomach worms—in horses can be controlled with phenothiazine administered in repeated small dosages in a routine seasonal treatment program.
Raisin marketing: Program for exportable surplus may require government sponsored agency
by H. R. Wellman