California Agriculture, January 1952
Volume 6, Number 1
Verticillium wilt and black root rot in strawberry
Virus diseases of orchids: Symptoms, spread, host range, distribution, and control practices determined by experimental transmissions
by D. D. Jensen
Not available – first paragraph follows: Viruses affect at least 10 different orchid genera.
Chemical weed control: Soil sterilants and translocated herbicides have their advantages and problems according to their special uses
by A. S. Crafts
Not available – first paragraph follows: Three major fields of chemical weed control are open for further development: the uses of temporary soil sterilants, permanent soil sterilants, and translocated herbicides.
Microelements in citrus: Spectrograph reveals presence and amounts of nickel and other trace elements in orange seedlings
by A. P. Vanselow
Not available – first paragraph follows: Spectrographic methods revealed that nickel is extremely toxic to citrus plants.
Asparagus plant breeding: A commercially desirable new strain can be developed only after a minimum of eight to ten years of testing
by G. C. Hanna
Not available – first paragraph follows: Asparagus breeding is a long-term research activity. Not until eight to ten years after a cross has been made is the plant breeder able to determine whether he has been successful in combining the characteristics of the male and female parents in the way that he hoped. Meanwhile daily yield records must be taken from harvests during a two- to three-month period each spring. These must include the number and size of all spears produced by every plant, as well as a catalog of various desirable characteristics. Individual plant records show a wide variation between plants in these characters.
Tomato insect control program: All-season program outlined for northern California as protection against the most important tomato pests
by A. E. Michelbacher , O. G. Bacon , W. W. Middlekauff
Not available – first paragraph follows: The tomato plant is subject to attack by insects from the time it is planted until the crop is harvested.
Verticillium wilt and black root rot of strawberry: Progress toward control made by soil fumigation with CWP-55 in split treatments of a combined dosage of 30 gallons per acre
by Stephen Wilhelm
Not available – first paragraph follows: Soil fumigation with technical chlorobromopropene—CBP-55—offers considerable promise for control of Verticillium wilt and black root rot of strawberry.
Soft brown scale on citrus: Abnormal increase of scale population in groves treated with parathion investigated in survey
by H. S. Elmer , W. H. Ewart , G. E. Carman
Not available – first paragraph follows: Not all commercial groves treated with parathion develop abnormally high populations of soft brown scale but where populations do increase they usually are extensive and have definite characteristics in comparison to populations found in groves not treated with parathion.
Spray chemical concentrations: Recommendations for bulk, semi consent rate, concentrate methods of spray application on deciduous fruit trees
by Arthur D. Borden
Not available – first paragraph follows: The application of spray chemicals to deciduous fruit orchards by the semi-concentrate and concentrate methods has resulted in a saving of about 70% in labor costs, and some 20% in materials.
Lemons and lemon products: New trends in market development of fresh and processed uses of lemons face the industry
by Sidney Hoos