All Issues

First of two articles on a study of yellow dwarf of cereals in California

A total of 15 improved backcrossed strains of popular wheat varieties were distributed in California between 1937 and 1950.

Reductions of 90% to 98.6% in olive scale populations in California orchards have been achieved by the use of natural enemies of the pest.

After four growing seasons, thriving scions grafted into old seedling orange tree stumps demonstrated a way to rehabilitate orchards where the original variety is no longer profitable.

Water spot injury to navel oranges was less on trees treated with 25% parathion wettable powder than on trees sprayed with oil, in four observed orchards in Los Angeles County.

Light green Eureka lemon fruits— with 1″ to 2″ stems—were rooted successfully in an experiment designed to develop a means of prolonging the useful life of lemon fruits for studies of a physiological, biochemical, and entomological nature.

Excessive leaf drop of citrus—resulting from oil sprays, insect or mite damage, or physiological disorders—probably materially interferes with the total carbohydrate production of the tree, and may result in a lower level of total soluble solids in the fruit at harvest.

European red mite and walnut aphid in the cool coastal regions of southern California may cause a premature dropping of walnut leaves, predisposing the nuts to sunburn injury and lowering the quality of the nut meats.

Leafy-twig cuttings from the Zutano avocado—a vigorously growing Mexican variety—readily rooted, without special procedures or hormone treatment, in propagation trials at the Riverside Citrus Experiment Station.

Thousands of chlorotic trees and shrubs—on lime soil in southern California—can be made to become green by soil applications of iron-containing chelates.

A synthetic soil conditioner, CRD-186—Krilium—was tested in rooting beds of commercially grown chrysanthemums for its influence on total root growth and the transplant operation.

Browning in the Suffer Pink bean—resulting in a lower selling price—can be reduced by early harvest and threshing but at the expense of bean size and yield.