California Agriculture, August 1960
Volume 14, Number 8
Texas variety almond tree nearly destroyed by perennial canker
Gibberellins on grape
by R. J. Weaver
Abstract Not Available – First paragraph follows: Tests with gibberellins indicate several uses in grape production. They were found to produce an excellent set in Black Corinth. They also greatly increased berry size of Thompson Seedless when the sprays were applied at the proper time for girdling. Gibberellin can be applied in conjunction with girdling or separately. In some cases gibberellin applied separately produced larger berries than those obtained from girdling only. The largest berries resulted from a combination of girdling and treatment with gibberellin.
Suffolk and Southdown rams as sires of market lambs compared in long-term study
by G. E. Bradford , W. C. Weir , D. T. Torell , G. M. Spurlock
Abstract Not Available – First paragraph follows: A three-year experiment at the Hop-land Field Station compared lambs sired by rams of a large breed with those sired by rams of a smaller, earlier-maturing breed. The lambs compared were sired by Suffolk and Southdown rams, and were out of range ewes.
Management of weeder geese in commercial fields
by Clarence Johnson
Abstract Not Available – First paragraph follows: Weeding with geese has proved to be an effective and cheap means of controlling grassy annual and perennial weeds when combined with other good farming practices. From 175,000 to 200,000 geese are being used in crops in California each year; the practice has been widely accepted and has spread rapidly since geese were first used for weeding commercial fields about seven years ago.
Growth responses of three annual clovers to treatments with 2,4-D—Part II
by Douglas P. Ormrod , William A. Williams , Burgess L. Kay
Abstract Not Available – First paragraph follows: Applications of 2,4-D to annual clovers growing on the range in El Dorado County generally affected dry matter production of subclover much less than that of rose clover. Rose clover yield was higher when the treatment date was later, but was never higher than the untreated plots. The dry matter yields were significantly reduced by spraying at the high rate at either of the first two dates.
Collapse in California woods
by Eric L. Ellwood
Abstract Not Available – First paragraph follows: Collapse in lumber—an extreme form of shrinkage which causes large volume loses and is accompanied by warping and splitting—is being studied in order to find ways to rehabilitate wood that has collapsed during drying and to develop a practicable technique to prevent collapse.
Mallet wound canker of almond trees
by James E. Devay , Harley English , F. L. Lukezic , H. J. O'Reilly
Abstract Not Available – First paragraph follows: Limb cankers that expand rapidly and often girdle and kill major limbs within three or four years are reported to be of increasing incidence in California almond orchards. One or several limbs may be attacked in a single season. Where the condition continues, the trees must be severely pruned or removed. The cankers are typified by a depression of the infected tissues and the production of an orange, frothy gum. The disease is frequently found in the Winters, Chico, and Rumsey areas and occasionally as far south as Stanislaus County. The Texas (Mission) variety is most susceptible to the cankers, as measured by the girdling and killing of branches, but Nonpareil, Peerless, and Ne Plus Ultra are often severely damaged. The Drake variety is less susceptible, and cankers on these trees apparently expand more slowly than the cankers on trees of the other varieties.
Wind machine-orchard heater system for frost protection in deciduous orchards
by Todd V. Crawford , Arthur S. Leonard
Abstract Not Available – First paragraph follows: The following article is the twelfth annual report of progress in studies on orchard frost protection published in California Agriculture.
Breeding potatoes for disease resistance
by G. N. Davis
Abstract Not Available – First paragraph follows: All new potato varieties and a large number of advanced generation experimental lines from many sources have been tested for disease resistance and adaptability to California growing conditions. A true breeding program with the production and evaluation of large numbers of F1—first generation hybrid—seedlings was initiated in the spring of 1958.
editorial, news, letters & science briefs
Potash on potatoes for chips
by Herman Timm
Potash: In California vineyards
by James A. Cook
Chemical weed control in azalea seed crop
by Jack L. Bivins , William A. Harvey
Copper in embryonic development
by Gladys Everson
Color and stability of wines
by Harold W. Berg
Control of the vinegar fly
by E. M. Staflord
Embedding media for electron microscopy
by Arthur R. Spurr
Effect of environment on rice plants
by Douglas P. Ormrod
Moderate grazing protects future forage production
by Harold F. Heady
Corrosion of aluminum irrigation pipe
by John L. Voth
Chemical regulator of plant growth
by Eric E. Conn
Lygus bug tolerance: To insecticides
by Oscar G. Bacon
Land disposal of industrial waste waters
by J. W. Biggar
Irrigation pumping plant characteristics in the San Joaquin Valley
by Trimble R. Hedges, Charles V. Moore