Verticillium wilt controlled: Chloropicrin achieves effective control of Verticillium wilt in strawberry plantings if properly applied as soil fumigant
Edward C. Koch
Authors AffiliationsStephen Wilhelm is Associate Plant Pathologist, University of California, Berkeley; Edward C. Koch is Farm Advisor, Santa Cruz County, University of California.
Hilgardia 10(6):3-14. DOI:10.3733/ca.v010n06p3. June 1956.
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.
Also in this issue:Grape packer-supply operations: Study of costs and efficiency in fresh table grape packing houses indicates potential savings by changes in some plants
Promising new seedling fig: Conadria variety, a hybrid developed in 30-year fig breeding program, shows promise for both fresh and dried fruit markets
Potato storage at tulelake: Study of five types of insulated wall construction in one building revealed weakness of a single block masonry wall
Storing horseradish stecklings: Overwinter storage of propagation stock for new commercial crop proves to be severe problem for farmers in Tulelake area
Frost damage to walnut kernels: Low temperatures during harvest season may cause injury to kernels resulting in chemical changes that produce rancidity
Navel orangeworm on walnuts: Infestations in northern California orchards dependent on population overwintering in past crop's waste left in field
Plant damage by air pollution: Visible injury to plants by atmospheric pollutants amounts to annual loss of millions of dollars in some affected areas
Copper deficiency of almonds: Applications of copper compounds to trees near Paso Robles produced response in leaf growth, corrected kernel shrivel
Treatment of gladiolus cormels: Hot-water bath treatment of planting stock shows promise as means of controlling serious corm-borne fungus diseases
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
Meat grades and prepackaging: Consumers reactions to grades of meat and prepackaging studied in Berkeley survey of retail buyers preferences
Determining changes in stored peas by use of a reference element