Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Codling moth infestations up: Damage to harvested walnuts increased markedly in northern California during the 1956 season in comparison with 1955

Authors

A. E. Michelbacher
Stephen W. Hitchcock

Authors Affiliations

A. E. Michelbacher is Professor of Entomology, University of California, Berkeley; Stephen W. Hitchcock is Research Assistant, University of California, Berkeley.

Publication Information

Hilgardia 11(2):7-7. DOI:10.3733/ca.v011n02p7. February 1957.

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Abstract

Codling moth populations on walnuts vary from year to year but during the 1956 season—in all districts where investigations were conducted—there was a general rise in the seriousness of infestations.

Michelbacher A, Hitchcock S. 1957. Codling moth infestations up: Damage to harvested walnuts increased markedly in northern California during the 1956 season in comparison with 1955. Hilgardia 11(2):7-7. DOI:10.3733/ca.v011n02p7

Also in this issue:

Agricultural-business outlook: Farmers must understand and apply economic principles to the business of modern agricultural production by scientific means

Peach tree borer control tests: Fall treatments with soil fumigants and use of trunk sprays evaluated in experimental program during the 1955–56 seasons

Aphid resistance to parathion: Nonphosphate insecticides under study for control of spotted alfalfa aphid where pest develops resstance to parathion

Fungi on spotted alfalfa aphid: Spread of fungi by natural and artificial means is resulting in excellent biological control of aphid in many counties

Soil fumigation for nematodes: Nematocides tested for the control of root-knot nematodes affecting fresh market and canning tomato crops in California

California scaly bark disease of citrus: No known cure for infected trees but treatment in early stages of disease can retard its advance into successive stages with their increasing economic loss

Bartlett pears for canning: Ripeness of fruit at time of processing affects color, flavor, aroma, and over-all quality of finished product

Citrus weed control by monuron: Experiments with urea herbicides for weed control in citrus orchards encouraging but use of the chemicals is restricted

Weed control near grass areas: Soil fumigants and contact spray materials included in series of studies on control of weeds in relatively confined areas

Effect of zinc applications on the crop of grapefruit trees affected with mottle-leaf

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