Red mite on pears: New acaricides included in early spray tests for control of European red mite
AuthorHarold F. Madsen
Author AffiliationsHarold F. Madsen is Assistant Entomologist, University of California, Berkeley.
Hilgardia 10(2):8-12. DOI:10.3733/ca.v010n02p8. February 1956.
Prebloom spray treatment against the overwintering eggs of European red mite on pears reduced populations and prevented an early season build-up. Thus far, Genite-923 is the only material which has given consistent control—at a dosage of 1% pints of 50% emulsion per 100 gallons—combined with lime-sulfur or organic fungicides regularly used for pear scab control.
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
Russet on bartletts: Pears from trees treated with copper or streptomycin equally free from russet
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