California Agriculture, March-April 1981

Volume 35, Number 3

peer-reviewed research articles

California citrus acreage response to income tax reform
by Hoy F. Carman
pp4, doi#10.3733/ca.v035n03p4
Abstract
Federal tax reform requiring capitalization of citrus grove development costs significantly reduced new plantings and total acreage.
Expanded Abstract | PDF

Mediterranean fruit fly: The worst may be yet to come
by Kenneth S. Hagen , William W. Allen , Richard L. Tassan
pp5-7, doi#10.3733/ca.v035n03p5
Abstract
Even if the fly spread to one-fourth of California's fruit-growing areas, the economic and ecological impact would be devastating.
Expanded Abstract | PDF

Rumensin supplements for replacement heifers on irrigated pasture
by John L. Hull , Charles A. Raguse , Richard E. Delmas
pp8-9, doi#10.3733/ca.v035n03p8
Abstract
Heifers fed 3.75 pounds per head per day of a barley-Rumensin supplement increased their average daily gain by 16 percent.Above-average replacement heifers can be reared for early breeding on energy-supplemented irrigated pasture plus Rumensin.
Expanded Abstract | PDF

Lighter pruning lessens bunch rot of Chenin Blanc grapes
by L. Peter Christensen
pp10-11, doi#10.3733/ca.v035n03p10
Abstract
Leaving up to 60 nodes at pruning reduced bunch rot in both spur- and cane-pruned Chenin blanc vines.Leaving 60 nodes per vine at pruning minimized bunch rot in this 2-year study without affecting vine vigor or grape composition.
Expanded Abstract | PDF

Vegetative propagation of jojoba
by Clifford B. Low , Wesley P. Hackett
pp12-13, doi#10.3733/ca.v035n03p12
Abstract
Jojoba was successfully propagated from stem cuttings taken during active growth. Cutting-grown plants matured sooner than seedlings.
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Evaluating pumping plant performance
by Blaine R. Hanson , Roger W. Benton , Donald L. Lancaster
pp14-15, doi#10.3733/ca.v035n03p14
Abstract
Operators can evaluate their pumps against design performance to determine irrigation efficiency and pinpoint potential trouble.A step-by-step procedure for measuring pump performance can identify and prevent potential irrigation problems.
Expanded Abstract | PDF

Compatibility of now parasite with commercial sprayers
by James E. Lindegren , John E. Dibble , Charles E. Curtis , Tom T. Yamashita , Ed Romero
pp16-17, doi#10.3733/ca.v035n03p16
Abstract
Studies show that a nematode parasite of navel orangeworm can be effectively applied to almonds by helicopter or ground sprayer.
Expanded Abstract | PDF

Management of root-knot nematode on Rillito soybeans
by Demetrios G. Kontaxis , Robert W. Hagemann
pp18, doi#10.3733/ca.v035n03p18a
Abstract
Rillito soybean is susceptible to root-knot nematode and should not be planted in untreated soil after a susceptible crop.
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Rooting and growth of dormant grapevine cuttings
by Curtis J. Alley , Albert T. Koyama
pp18-19, doi#10.3733/ca.v035n03p18b
Abstract
Rooting and growth of some dormant cuttings were as good after 1 or 2 years of cold storage as when fresh cuttings were used.
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An evaporative cooler for vegetable crops
by James F. Thompson , Robert F. Kasmire
pp20-21, doi#10.3733/ca.v035n03p20
Abstract
The low cost of this cooling system makes it especially suitable for small farmers and roadside merchants. It also can be used for short-term storage.A low-cost energy-efficient cooling system has been designed for field use by both large and small vegetable growers.
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Potential new citrus pest: Japanese bayberry whitefly
by Mike Rose , Paul DeBach , James Woolley
pp22-23, doi#10.3733/ca.v035n03p22
Abstract
A newcomer to California from Japan, this pest is spreading. Two predators have been successfully introduced, search for another is under way in China.The search is on for effective predators of this new insect pest from Japan, now spreading rapidly in southern California citrus.
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editorial, news, letters & science briefs

EDITORIAL: The medfly invasion
by J. B. Kendrick
pp2, doi#10.3733/ca.v035n03p2
PDF