Calag Archive

Almond, peach and apricot growers in the Brentwood area suffered considerable damage from the peach tree borer in 1955.

Failure of parathion and malathion to control the spotted alfalfa aphid—Therioaphis maculata (Buckton)—in California was reported in an increasing number during the summer of 1956.

Five unidentified species of parasitic entomophthorous fungi are now known to be attacking the spotted alfalfa aphid—Therioaphis maculata (Buckton)—in California.

Widespread damage to tomatoes in California is caused by two root-knot nematode species—Meloidogyne incognita var. acrita and M. javanica.

Codling moth populations on walnuts vary from year to year but during the 1956 season—in all districts where investigations were conducted—there was a general rise in the seriousness of infestations.

Psorosis—scaly bark—is the primary killer of citrus trees in California.

Proper ripeness of Bartlett pears at canning time is important to the quality of the product.

The urea herbicide, monuron—3-(p-chlorophenyl)-l, 1-dimethylurea—formerly known as CMU, was registered with a federal residue tolerence of 1 ppm—one part per million—for limited use in Valencia and navel orange orchards during the fall of 1955.

Machine and chemical methods of weed control in relatively restricted areas—flower beds, ornamental trees and shrubs, small drainage channels, parking areas and patios—are not adaptable to most situations or are hazardous to adjacent plantings.