California Agriculture
California Agriculture
California Agriculture
University of California
California Agriculture

Archive

September-October 1982
Volume 36, Number 9

Peer-reviewed research and review articles

Rebaudi's stevia: Natural noncaloric sweeteners
by Clinton C. Shock
| Full text HTML  | PDF  
Stevia, a Paraguayan plant that produces compounds 250 times as sweet as table sugar, is being studied for possible commercial production here.
Desert soil compaction reduces annual plant cover
by John A. Adams, Lewis H. Stolzy, Albert S. Endo, Peter G. Rowlands, Hyrum B. Johnson
| Full text HTML  | PDF  
Drying accentuated adverse effects of compaction caused by just a few passes of an off-road vehicle.
Dry conditions intensified harmful effects of compaction to sensitive desert annual plants.
Long-term study reaffirms yield increases of narrow-row cotton
by Robert G. Curley, Clay Brooks, Robert A. Kepner, Kamal El-Zik, Alan G. George, Thomas A. Kerby, Offa D. McCutcheon, Leslie K. Stromberg, Ronald N. Vargas, Bill L. Weir, David L. West, Kent Brittan
| Full text HTML  | PDF  
Although narrow rows yielded more and reduced production costs, strippers caused more harvesting and ginning problems than spindle-picked cotton in normal rows. Cover photo shows cotton stripper with experimental brush-type stripper head for harvesting narrow-row cotton.
Cumulative effects of ethephon as a fruit thinner on French prune trees
by G. Steven Sibbett, George C. Martin
| Full text HTML  | PDF  
Spraying ethephon for three years thinned fruit and increased size without apparent harm to trees.
Drip irrigation saves money in young almond orchards
by Elias Fereres, Donald A. Martinich, Thomas M. Aldrich, Juan R. Castel, Eduardo Holzapfel, Herbert Schulbach
| Full text HTML  | PDF  
Growers should consider energy savings of drip irrigation in orchards' early years.
Greatest benefit is in orchard's first five years. Grower may then want to convert to sprinklers.
Reducing pesticide treatments in celery may be justified
by Robert A. Van Steenwyk, Nick C. Toscano
| Full text HTML  | PDF  
Lower insecticide usage in the first half of the season did not reduce marketable fall-crop celery in this test.Reducing insecticide applications in the first half of the growing season did not reduce marketable fall-crop celery in southern California tests.
Imported natural enemies established against ice plant scales in California
by Richard L. Tassan, Kenneth S. Hagen, Daniel V. Cassidy
| Full text HTML  | PDF  
Ice plant scales, now widespread in freeway plantings, are being held in check by imported natural enemies.
Disease-induced potassium deficiency and verticillium wilt in cotton
by Lee J. Ashworth, Alan G. George, Offa D. McCutcheon
| Full text HTML  | PDF  
Cause of the root-disease-induced potassium deficiency is unknown, but Acala SJ-5 outyields SJ-2 in problem soils, regardless of verticillium wilt.
New studies on the link to verticillium may help find the cause and ultimate control of the problem.
Hired workers on California farms
by Philip L. Martin, John W. Mamer
| Full text HTML  | PDF  
Available reports show fairly stable employment from year to year, but the work force has changed.
Each year California farms mobilize workers to fill half a million seasonal jobs.
Whiteflies cause problems for southern California growers
by Marshall W. Johnson, Nick C. Toscano, Harold T. Reynolds, Edward S. Sylvester, Ken Kido, Eric T. Natwick
| Full text HTML  | PDF  
Available pesticides aren't effective, so scientists are looking at natural enemies to control this pest.
A task force of scientists is searching for effective whitefly controls.
Improved parasites for filth fly control
by E. Fred Legner, Max E. Badgley
| Full text HTML  | PDF  
New parasitic wasp species and strains may improve biological control of flies at poultry and dairy sites.
Ethephon may hasten cotton boll opening, increase yield
by Bill L. Weir, J. M. Gaggero
| Full text HTML  | PDF  
During a year of adverse weather conditions, ethephon hastened boll opening and increased yields by up to 211 pounds of lint per acre.
The potential market for California plums and nectarines in Japan
by Kirby S. Moulton
| Full text HTML  | PDF  
A possible market exists in Japan for California nectarines, but prospects are dim for plums.

News and Opinion

An ailing partnership?
by J. B. Kendrick
Full text HTML  | PDF  
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September-October 1982
Volume 36, Number 9

Peer-reviewed research and review articles

Rebaudi's stevia: Natural noncaloric sweeteners
by Clinton C. Shock
| Full text HTML  | PDF  
Stevia, a Paraguayan plant that produces compounds 250 times as sweet as table sugar, is being studied for possible commercial production here.
Desert soil compaction reduces annual plant cover
by John A. Adams, Lewis H. Stolzy, Albert S. Endo, Peter G. Rowlands, Hyrum B. Johnson
| Full text HTML  | PDF  
Drying accentuated adverse effects of compaction caused by just a few passes of an off-road vehicle.
Dry conditions intensified harmful effects of compaction to sensitive desert annual plants.
Long-term study reaffirms yield increases of narrow-row cotton
by Robert G. Curley, Clay Brooks, Robert A. Kepner, Kamal El-Zik, Alan G. George, Thomas A. Kerby, Offa D. McCutcheon, Leslie K. Stromberg, Ronald N. Vargas, Bill L. Weir, David L. West, Kent Brittan
| Full text HTML  | PDF  
Although narrow rows yielded more and reduced production costs, strippers caused more harvesting and ginning problems than spindle-picked cotton in normal rows. Cover photo shows cotton stripper with experimental brush-type stripper head for harvesting narrow-row cotton.
Cumulative effects of ethephon as a fruit thinner on French prune trees
by G. Steven Sibbett, George C. Martin
| Full text HTML  | PDF  
Spraying ethephon for three years thinned fruit and increased size without apparent harm to trees.
Drip irrigation saves money in young almond orchards
by Elias Fereres, Donald A. Martinich, Thomas M. Aldrich, Juan R. Castel, Eduardo Holzapfel, Herbert Schulbach
| Full text HTML  | PDF  
Growers should consider energy savings of drip irrigation in orchards' early years.
Greatest benefit is in orchard's first five years. Grower may then want to convert to sprinklers.
Reducing pesticide treatments in celery may be justified
by Robert A. Van Steenwyk, Nick C. Toscano
| Full text HTML  | PDF  
Lower insecticide usage in the first half of the season did not reduce marketable fall-crop celery in this test.Reducing insecticide applications in the first half of the growing season did not reduce marketable fall-crop celery in southern California tests.
Imported natural enemies established against ice plant scales in California
by Richard L. Tassan, Kenneth S. Hagen, Daniel V. Cassidy
| Full text HTML  | PDF  
Ice plant scales, now widespread in freeway plantings, are being held in check by imported natural enemies.
Disease-induced potassium deficiency and verticillium wilt in cotton
by Lee J. Ashworth, Alan G. George, Offa D. McCutcheon
| Full text HTML  | PDF  
Cause of the root-disease-induced potassium deficiency is unknown, but Acala SJ-5 outyields SJ-2 in problem soils, regardless of verticillium wilt.
New studies on the link to verticillium may help find the cause and ultimate control of the problem.
Hired workers on California farms
by Philip L. Martin, John W. Mamer
| Full text HTML  | PDF  
Available reports show fairly stable employment from year to year, but the work force has changed.
Each year California farms mobilize workers to fill half a million seasonal jobs.
Whiteflies cause problems for southern California growers
by Marshall W. Johnson, Nick C. Toscano, Harold T. Reynolds, Edward S. Sylvester, Ken Kido, Eric T. Natwick
| Full text HTML  | PDF  
Available pesticides aren't effective, so scientists are looking at natural enemies to control this pest.
A task force of scientists is searching for effective whitefly controls.
Improved parasites for filth fly control
by E. Fred Legner, Max E. Badgley
| Full text HTML  | PDF  
New parasitic wasp species and strains may improve biological control of flies at poultry and dairy sites.
Ethephon may hasten cotton boll opening, increase yield
by Bill L. Weir, J. M. Gaggero
| Full text HTML  | PDF  
During a year of adverse weather conditions, ethephon hastened boll opening and increased yields by up to 211 pounds of lint per acre.
The potential market for California plums and nectarines in Japan
by Kirby S. Moulton
| Full text HTML  | PDF  
A possible market exists in Japan for California nectarines, but prospects are dim for plums.

News and Opinion

An ailing partnership?
by J. B. Kendrick
Full text HTML  | PDF  

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