California Agriculture, June 1956

Volume 10, Number 6
Plant injury from atmospheric pollution

research articles

Verticillium wilt controlled: Chloropicrin achieves effective control of Verticillium wilt in strawberry plantings if properly applied as soil fumigant
by Stephen Wilhelm , Edward C. Koch
pp3-14, doi#10.3733/ca.v010n06p3
Abstract
Abstract Not Available – First paragraph follows: Three milliliters of chloropicrin injected 6" deep into moist soil will diffuse a cubic foot of soil volume in sufficient concentration to kill the Verticillium wilt fungus. This information—obtained from laboratory and greenhouse research—has been generally substantiated in commercial fumigation for Verticillium wilt control in chrysanthemums. It applies to soils varying from light sandy loams to moderately heavy clay loams; to soil temperatures of 45°F to 60°F; to soil moisture of a seedbed level extending to the soil surface; and to a completely pulverized soil tilth extending to at least a 9" depth.
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Promising new seedling fig: Conadria variety, a hybrid developed in 30-year fig breeding program, shows promise for both fresh and dried fruit markets
by Ira J. Condit , Robert M. Warner
pp4-14, doi#10.3733/ca.v010n06p4
Abstract
Abstract Not Available – First paragraph follows: Tested at Chowchilla, a new hybrid fig—the Conadria—showed such pronounced vigor of growth, crop production, and quality of fresh and dried fruit that one grower grafted ten acres of young trees to the new variety.
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Potato storage at tulelake: Study of five types of insulated wall construction in one building revealed weakness of a single block masonry wall
by L. W. Neubauer , B. J. Hoyle
pp5-18, doi#10.3733/ca.v010n06p5
Abstract
Abstract Not Available – First paragraph follows: Tulelake—the largest late potato producing area in the state—holds most of the 8,000 acre crop for three to seven months as about half is seed potatoes for other areas. Tulelake also is the only area in the state that stores the crop in cellars requiring protection from cold as low as −30°F.
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Storing horseradish stecklings: Overwinter storage of propagation stock for new commercial crop proves to be severe problem for farmers in Tulelake area
by Burton J. Hoyle
pp6-14, doi#10.3733/ca.v010n06p6
Abstract
Abstract Not Available – First paragraph follows: Overwinter storage of horseradish stecklings—slender roots usually 8" to 14" long and not over ½″ in diameter— from harvest until spring planting often results in heavy losses.
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Frost damage to walnut kernels: Low temperatures during harvest season may cause injury to kernels resulting in chemical changes that produce rancidity
by L. L. Claypool , Paul Esau
pp7-16, doi#10.3733/ca.v010n06p7
Abstract
Abstract Not Available – First paragraph follows: Late harvested walnuts in some areas of northern California—though not a common occurrence—have suffered considerable freezing injury to walnut kernels.
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Navel orangeworm on walnuts: Infestations in northern California orchards dependent on population overwintering in past crop's waste left in field
by A. E. Michelbacher
pp8, doi#10.3733/ca.v010n06p8
Abstract
Abstract Not Available – First paragraph follows: The navel orangeworm infestation in the 1955 walnut crop in northern California was less than it was in 1954, but whether the downward trend will continue in 1956 is unknown.
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Plant damage by air pollution: Visible injury to plants by atmospheric pollutants amounts to annual loss of millions of dollars in some affected areas
by John T. Middleton , A. S. Crafts , R. F. Brewer , O. C. Taylor
pp9-12, doi#10.3733/ca.v010n06p9
Abstract
Abstract Not Available – First paragraph follows: Production and quality of an important number of field, flower, fruit, ornamental, and vegetable crops—in many of the important growing areas of California—are adversely affected by air pollution.
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Copper deficiency of almonds: Applications of copper compounds to trees near Paso Robles produced response in leaf growth, corrected kernel shrivel
by D. E. Kester , J. G. Brown , Tom Aldrich
pp13-16, doi#10.3733/ca.v010n06p13
Abstract
Abstract Not Available – First paragraph follows: Poor growth and a rough bark condition in a group of almond trees in the Paso Robles area attracted attention in 1952. Some trees showed considerable gumming of the trunks and lower parts of the main branches.
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Treatment of gladiolus cormels: Hot-water bath treatment of planting stock shows promise as means of controlling serious corm-borne fungus diseases
by J. G. Bald , John Ferguson , B. B. Markley
pp15-16, doi#10.3733/ca.v010n06p15
Abstract
Abstract Not Available – First paragraph follows: Diseases of gladioli—especially those carried on the planting stock—are the limiting factor in commercial production of gladioli in California.
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Citrus flat mite on increase: Light infestations known to occur since discovery of pest in state in 1949 increasing as the use of sulfur sprays decreases
by H. S. Elmer , L. R. Jeppson
pp17-18, doi#10.3733/ca.v010n06p17
Abstract
Abstract Not Available – First paragraph follows: A general increase in the economic importance of the citrus flat mite has occurred throughout the citrus-growing area of central California since 1952. Infestations of the mite on citrus have been reported from the Coachella Valley, and in 1955, heavy infestations were found severely scarring tangerines in the Imperial Valley.
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Meat grades and prepackaging: Consumers reactions to grades of meat and prepackaging studied in Berkeley survey of retail buyers preferences
by Jessie V. Coles
pp19, doi#10.3733/ca.v010n06p19
Abstract
Abstract Not Available – First paragraph follows: The majority of the 1,125 buyers of the meat used in households interviewed in a survey of 15 large food stores in Berkeley preferred the U.S. Good grade over the U.S. Choice grade—when confronted with a sirloin steak and a rib roast of each grade—even though the prices were the same.
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General Information

Grape packer-supply operations: Study of costs and efficiency in fresh table grape packing houses indicates potential savings by changes in some plants
by L. L. Sammet
pp2-18, doi#10.3733/ca.v010n06p2
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