Calag Archive

July-August 1987
Volume 41, Number 7

Peer-reviewed research and review articles

Reclaimed water for irrigation of vegetables eaten raw

by Richard G. Burau, Bahman Sheikh, Robin P. Cort, Robert C. Cooper, David Ririe

Abstract

Highly treated municipal wastewater was as safe as well water for irrigating crops in a five-year study. (Infrared photo of test plots by Bill Wildman)

A five-year study revealed no public health risk associated with irrigation of raw-eaten vegetable crops with reclaimed domestic wastewater.

Quick tests for pesticide resistance in spider mites

by Elizabeth E. Grafton-Cardwell, Jeffrey Granett, Timothy J. Dennehy

Abstract

Early detection helps growers to avoid wasted acaricide applications and to manage resistance.

A rapid bioassay that detects buildup of resistance can help growers avoid the expense and hazard of wasted pesticide treatments.

Control of spring dead spot of bermudagrass

by Howard D. Ohr, Margaret K. Murphy, Emmylou M. Krausman, Robert M. Endo, J. Michael Henry

Abstract

Following outbreaks in the mid 1970s, the disease has spread in southern California. Benomyl gives control.

Many homeowners give up on bemrudagrass when dead spot becomes severe, but tests show the disease can be con trolled with fungicides.

Toxicity of pesticides to western predatory mite

by Marjorie A. Hoy, Janet Conley

Abstract

Several pesticides showed low toxicity to the spider mite predator

Biological control of variegated grape leafhopper

by Charles H. Pickett, Lloyd T. Wilson, Daniel Gonzalez, Donald L. Flaherty

Abstract

Imported forms of the parasitic wasp Anagrus epos showed some promise in Central Valley field-cage evaluations.

Two look-alike imported biotypes of a parasitic wasp are being tested against the variegated grape leafhopper in the San Joaquin Valley.

Waste lime supplies phosphorus to sugarbeet

by Robert L. Sailsbery, F. Jack Hills

Abstract

Sugarbeet responded as well to waste lime as to phosphorus fertilizer, and lime aided seedling emergence.

Sugarbeet responded as well to waste lime as to phosphorus fertilizer. The lime aided seedling emergence and yields.

Controlling powdery mildew in greenhouse roses

by Albert O. Paulus, Seward T. Besemer, Jerry Nelson

Abstract

Several fungicides tested controlled the disease in ‘Royalty’ rose, a particularly susceptible cultivar.

Agricultural policy implications of biotechnology

by Samuel H. Logan, Harold O. Carter, Luanne Lohr

Abstract

Coordinated planning is needed to deal with potentially broad economic and biological aspects of new technology.

Advances in genetic engineering involve more than scientific breakthroughs. Potential economic effects - some possibly undesirable - also need to be considered.

California's shrinking farmland

by Ralph Grossi, Will Shafroth, John Hart, Michael J. Singer

Abstract

Statewide action is needed to stem the loss of farmland to urbanization, erosion, salinization, and other causes.

Even with strong protective measures, California will probably continue to lose agricultural land to urbanization, erosion, and salinity.

News and opinion

Emerging issues in marketing

by Kenneth R. Farrell

Peer-reviewed research and review articles

Reclaimed water for irrigation of vegetables eaten raw

by Richard G. Burau, Bahman Sheikh, Robin P. Cort, Robert C. Cooper, David Ririe

Abstract

Highly treated municipal wastewater was as safe as well water for irrigating crops in a five-year study. (Infrared photo of test plots by Bill Wildman)

A five-year study revealed no public health risk associated with irrigation of raw-eaten vegetable crops with reclaimed domestic wastewater.

Quick tests for pesticide resistance in spider mites

by Elizabeth E. Grafton-Cardwell, Jeffrey Granett, Timothy J. Dennehy

Abstract

Early detection helps growers to avoid wasted acaricide applications and to manage resistance.

A rapid bioassay that detects buildup of resistance can help growers avoid the expense and hazard of wasted pesticide treatments.

Control of spring dead spot of bermudagrass

by Howard D. Ohr, Margaret K. Murphy, Emmylou M. Krausman, Robert M. Endo, J. Michael Henry

Abstract

Following outbreaks in the mid 1970s, the disease has spread in southern California. Benomyl gives control.

Many homeowners give up on bemrudagrass when dead spot becomes severe, but tests show the disease can be con trolled with fungicides.

Toxicity of pesticides to western predatory mite

by Marjorie A. Hoy, Janet Conley

Abstract

Several pesticides showed low toxicity to the spider mite predator

Biological control of variegated grape leafhopper

by Charles H. Pickett, Lloyd T. Wilson, Daniel Gonzalez, Donald L. Flaherty

Abstract

Imported forms of the parasitic wasp Anagrus epos showed some promise in Central Valley field-cage evaluations.

Two look-alike imported biotypes of a parasitic wasp are being tested against the variegated grape leafhopper in the San Joaquin Valley.

Waste lime supplies phosphorus to sugarbeet

by Robert L. Sailsbery, F. Jack Hills

Abstract

Sugarbeet responded as well to waste lime as to phosphorus fertilizer, and lime aided seedling emergence.

Sugarbeet responded as well to waste lime as to phosphorus fertilizer. The lime aided seedling emergence and yields.

Controlling powdery mildew in greenhouse roses

by Albert O. Paulus, Seward T. Besemer, Jerry Nelson

Abstract

Several fungicides tested controlled the disease in ‘Royalty’ rose, a particularly susceptible cultivar.

Agricultural policy implications of biotechnology

by Samuel H. Logan, Harold O. Carter, Luanne Lohr

Abstract

Coordinated planning is needed to deal with potentially broad economic and biological aspects of new technology.

Advances in genetic engineering involve more than scientific breakthroughs. Potential economic effects - some possibly undesirable - also need to be considered.

California's shrinking farmland

by Ralph Grossi, Will Shafroth, John Hart, Michael J. Singer

Abstract

Statewide action is needed to stem the loss of farmland to urbanization, erosion, salinization, and other causes.

Even with strong protective measures, California will probably continue to lose agricultural land to urbanization, erosion, and salinity.