Calag Archive

Insects of economic importance in California–whether native or introduced–have often been studied with almost complete disregard for their relationship to other insect species, largely because of the immediacy of a specific problem.

Alfalfa extracts soil-moisture uniformly to the depth of its root system, and rapidly growing alfalfa will lower the water table appreciably.

Most varieties of olives can be propagated readily by either leafy softwood cuttings or by hardwood cuttings. However, the Sevillano–one of the leading commercial olive varieties in California–has been difficult to propagate by cuttings; so nurserymen have resorted to grafting on seedlings as a means of propagation.

Twenty-four new shoots were produced by five layered paradox hybrid seedlings in preliminary trials at Davis in 1953.

A strain of walnut aphid–Chroma-phis juglandicola (Kltb.)–encountered in the San Jose area during insect investigations in 1953 exhibited definite resistance to parathion.

Verticillium disease of chrysanthemum can be controlled by fumigation.

No correlation between moisture content of corn and field losses was evidenced in Antelope Valley field trials– under the conditions of the study–with mechanical harvesters in 1953.

The fluorine investigations referred to in the following progress report were initiated by the late I. C. Kaudy and continued by the authors.

Pheasants showed aversion to lindane-treated grain in acceptance tests at Davis.

Results of growth trials with young chicks indicate no justification for the use of natural earth materials in rations for those chicks fed a practical starting ration.

Infectious bronchitis is widely distributed in the major poultry raising areas in California. However, all respiratory diseases of poultry are not caused by infectious bronchitis virus. Vaccination with a live virus vaccine against an impending respiratory disease should not be attempted until the respiratory condition for which the vaccine is intended has been correctly diagnosed by a qualified veterinarian or laboratory.

Safflower oil-cake meal–a high-protein meal that is a promising source of protein for laying hens–was tested as a possible livestock feed in digestion trials with wether lambs.