Filbertworm control trials: Two new insecticides tested on Payne, Franquette and Hartley walnuts in two experimental orchards in northern California
AuthorsArthur H. Retan
George R. Post
Clarence S. Davis
A. E. Michelbacher
Authors AffiliationsArthur H. Retan is Farm, Advisor, Butte County, University of California; George R. Post is Farm Advisor, Sutter County, University of California; Clarence S. Davis is Extension Specialist in Entomology, University of California; A. E. Michelbacher is Professor of Entomology, University of California, Berkeley.
Hilgardia 12(4):10-11. DOI:10.3733/ca.v012n04p10. April 1958.
The intensity of the filbertworm infestation of walnuts in northern California in 1957 was less than in the peak year of 1954, but it marked the fourth straight year that the filbertworm has presented a problem. Based on past history the 1957 attack was surprising because observations have indicated that the pest would not continue at a highly destructive level over a period of several years.
Also in this issue:Water pricing by small groups: Pricing policies of small watershed and irrigation district organizations in California affect use of water they provide
Root rot of Easter lilies: Preplanting fungicidal dip for lily bulbs reduces incidence of disease and improves bloom quality and quantity of plants
Wild safflower in California: Improvement of cultivated safflower through plant-breeding program to obtain desirable characteristics of wild species
Potato sprout inhibitor spray: Aircraft spraying of growth regulator maleic hydrazide is not effective means of reducing sprouting of stored potatoes
Spray thinning Newtown apples: Properly timed and applied, spray treatment satisfactorily thinned fruit for size and yield in trials near Watsonville
Pelleted alfalfa hay: Baled and pelleted alfalfa hay in comparative trial with beef steers
Chamise control with aircraft: Herbicides applied by aircraft in spring following fall burn controlled chamise sprouts and brush seedlings in range test
Turf invasion by weedy grasses: Weed-free plots of Merion bluegrass turf used in study of factors favoring invasion by crabgrass and common bermuda
Cutworms on white asparagus: Satisfactory control achieved with an endrin oil-base bait but chemical not yet registered for use on green asparagus
Fruits, vegetables at retail: Availability of fresh and frozen fruits, vegetables varies with store size, location, and ownership as shown by survey
Host organs attacked by bacterial canker of stone fruits
Factors affecting development of the bacterial canker of stone fruits
Some factors affecting the susceptibility of plants to fire blight