Russet on bartletts: Pears from trees treated with copper or streptomycin equally free from russet
AuthorsRichard W. Harris
William H. Griggs
Authors AffiliationsRichard W. Harris is Assistant Professor of Homology, University of California, Davis; William H. Griggs is Associate Professor of Pomology, University of California, Davis.
Hilgardia 10(2):9-15. DOI:10.3733/ca.v010n02p9. February 1956.
Bartlett pears from trees in two Mendocino County orchards and one Sacramento Valley orchard that were sprayed or dusted with copper—for blight control—during 1955 were as free from russet as fruit from trees treated with streptomycin.
Also in this issue:California egg buying systems: Factors affecting wholesale prices of eggs in principal markets influenced by dominant buying system of local area
Range grazing capacity raised: Program of seeding annual clovers, fertilization and grazing management resulted in improved forage quality and quantity
Rapid spread of alfalfa pest: Spotted alfalfa aphid infests about of state's alfalfa acreage within two years after its discovery in California
Removal of tinder in ponderosa: Prescribed burning of forest brush during the wet season by tested methods effectively reduces hazard of wildfire
Red mite on pears: New acaricides included in early spray tests for control of European red mite
Codling moth on walnuts in '55: Downward trend in infestations of 1955 in northern California not uniform and need of control treatments in 1956 indicated
DDT residues on sweet corn: Kernels and cob of corn treated with DDT remain practically free of residues but amounts on plant restrict use as fodder
Zinc-deficient crops: Sweet corn, tomatoes, beans, and sugar beets used in tests for zinc deficiency
Nitrogen trichloride and other gases as fungicides