California Agriculture
California Agriculture
California Agriculture
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California Agriculture, Vol. 3, No.7

New insecticides screened for effectiveness
July 1949
Volume 3, Number 7

Research articles

Reseeding after klamath weed: Areas cleared of weed by beetles may require a reseeding program to restore valuable forage plants
by Alfred H. Murphy, Carl B. Huffaker
| Full text HTML  | PDF  
Not available – first paragraph follows: The local ofice of the Farm Advisor should be consulted as to types of seed to use, the best times for seeding, and the progress of reseeding studies not yet completed.
The local ofice of the Farm Advisor should be consulted as to types of seed to use, the best times for seeding, and the progress of reseeding studies not yet completed. See: “Klamath Weed Beetles” by J. K. Holloway and C. B. Huffaker, California Agriculture, February, 1949, page 3.
Grape surplus: Grape growers need united industry action for effective surplus control
by S. W. Shear
| Full text HTML  | PDF  
Summary not available – first paragraph follows: Since 1945, large government subsidies have been the only thing that has kept California grape prices and growers' incomes from being wrecked by the loss of most of the state's large prewar commercial raisin exports to Europe.
Not available – first paragraph follows: Since 1945, large government subsidies have been the only thing that has kept California grape prices and growers' incomes from being wrecked by the loss of most of the state's large prewar commercial raisin exports to Europe.
Citrus pest insecticides: Screened by laboratory and field tests as new control chemicals are developed
by R. L. Metcalf, R. B. Carlson, U. E. Murphy
| Full text HTML  | PDF  
Not available – first paragraph follows: New synthetic organic insecticides for controlling citrus insects and mites require proving upon the individual species because of the remarkable degree of specificity shown by the compounds.
Not available – first paragraph follows: New synthetic organic insecticides for controlling citrus insects and mites require proving upon the individual species because of the remarkable degree of specificity shown by the compounds.
Peat lands of the delta: A 26-year study shows disappearing surface of islands is result of combined factors
by Walter W. Weir
| Full text HTML  | PDF  
Not available – first paragraph follows: The peat soils of the Sacramento-San Joaquin Delta are disappearing at a measurable rate—averaging slightly more than three inches a year—and there is no indication that the rate is decreasing.
Not available – first paragraph follows: The peat soils of the Sacramento-San Joaquin Delta are disappearing at a measurable rate—averaging slightly more than three inches a year—and there is no indication that the rate is decreasing.
Mosaic resistance: Transferred from wild tobacco to cultivated varieties through science of genetics
by Roy E. Clausen
| Full text HTML  | PDF  
Not available – first paragraph follows: Varieties of cultivated tobacco are almost invariably susceptible to mosaic, a virus disease, which also may infect tomatoes and some other crop plants.
Not available – first paragraph follows: Varieties of cultivated tobacco are almost invariably susceptible to mosaic, a virus disease, which also may infect tomatoes and some other crop plants.
Improving tomato fruit set: Use of hormone spray treatment for improvement of fruit set for spring and early summer harvest
by P. A. Minges, L. K. Mann
| Full text HTML  | PDF  
Not available – first paragraph follows: Local experience on the results of hormone treatment can be obtained from the Farm Advisors' ofices. Staff members of those ofices coiiperated in the studies reported here.
Local experience on the results of hormone treatment can be obtained from the Farm Advisors' ofices. Staff members of those ofices coiiperated in the studies reported here.
Tomato insects: Northern California investigations with chlorinated hydrocarbon insecticides
by A. E. Michelbacher, W. W. Middlekauff, N. B. Akesson, Frank Lamb
| Full text HTML  | PDF  
Not available – first paragraph follows: The 1948 season marked the end of the second year in which DDT and DDD insecticides were used extensively for the control of insects attacking tomatoes.
Not available – first paragraph follows: The 1948 season marked the end of the second year in which DDT and DDD insecticides were used extensively for the control of insects attacking tomatoes.
Treated wood stakes: Exposed Douglas fir and eucalyptus stakes require treatment for long life
by L. W. Neubauer
| Full text HTML  | PDF  
Not available – first paragraph follows: Simple and convenient methods for preservative treatment of redwood, Douglas fir and eucalyptus wood were tested with a total of seven different oils and chemicals in a 12-year study at Davis.
Not available – first paragraph follows: Simple and convenient methods for preservative treatment of redwood, Douglas fir and eucalyptus wood were tested with a total of seven different oils and chemicals in a 12-year study at Davis.
Irrigation of walnut orchards: Mature trees require large quantities of water daily throughout time they are in leaf
by A. H. Hendrickson, F. J. Veihmeyer
| Full text HTML  | PDF  
Not available – first paragraph follows: After walnut trees come into leaf they draw heavily upon the available supply of soil moisture.
Not available – first paragraph follows: After walnut trees come into leaf they draw heavily upon the available supply of soil moisture.
Yeast culture investigations: Live yeast culture tested for production efficiency as feedstuff for chicks
by C. R. Grau, M. Kamei
| Full text HTML  | PDF  
Not available – first paragraph follows: Yeast culture is being used as a poultry feedstuff in sections of southern California as part of the constant attempt to increase efficiencies of meat and egg production.
Not available – first paragraph follows: Yeast culture is being used as a poultry feedstuff in sections of southern California as part of the constant attempt to increase efficiencies of meat and egg production.
Fluid milk production: State's human population up 300% but dairy cow population up only 50%
by W. M. Regan
| Full text HTML  | PDF  
Not available – first paragraph follows: Fluid milk must be produced near the point of consumer markets.
Not available – first paragraph follows: Fluid milk must be produced near the point of consumer markets.
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California Agriculture, Vol. 3, No.7

New insecticides screened for effectiveness
July 1949
Volume 3, Number 7

Research articles

Reseeding after klamath weed: Areas cleared of weed by beetles may require a reseeding program to restore valuable forage plants
by Alfred H. Murphy, Carl B. Huffaker
| Full text HTML  | PDF  
Not available – first paragraph follows: The local ofice of the Farm Advisor should be consulted as to types of seed to use, the best times for seeding, and the progress of reseeding studies not yet completed.
The local ofice of the Farm Advisor should be consulted as to types of seed to use, the best times for seeding, and the progress of reseeding studies not yet completed. See: “Klamath Weed Beetles” by J. K. Holloway and C. B. Huffaker, California Agriculture, February, 1949, page 3.
Grape surplus: Grape growers need united industry action for effective surplus control
by S. W. Shear
| Full text HTML  | PDF  
Summary not available – first paragraph follows: Since 1945, large government subsidies have been the only thing that has kept California grape prices and growers' incomes from being wrecked by the loss of most of the state's large prewar commercial raisin exports to Europe.
Not available – first paragraph follows: Since 1945, large government subsidies have been the only thing that has kept California grape prices and growers' incomes from being wrecked by the loss of most of the state's large prewar commercial raisin exports to Europe.
Citrus pest insecticides: Screened by laboratory and field tests as new control chemicals are developed
by R. L. Metcalf, R. B. Carlson, U. E. Murphy
| Full text HTML  | PDF  
Not available – first paragraph follows: New synthetic organic insecticides for controlling citrus insects and mites require proving upon the individual species because of the remarkable degree of specificity shown by the compounds.
Not available – first paragraph follows: New synthetic organic insecticides for controlling citrus insects and mites require proving upon the individual species because of the remarkable degree of specificity shown by the compounds.
Peat lands of the delta: A 26-year study shows disappearing surface of islands is result of combined factors
by Walter W. Weir
| Full text HTML  | PDF  
Not available – first paragraph follows: The peat soils of the Sacramento-San Joaquin Delta are disappearing at a measurable rate—averaging slightly more than three inches a year—and there is no indication that the rate is decreasing.
Not available – first paragraph follows: The peat soils of the Sacramento-San Joaquin Delta are disappearing at a measurable rate—averaging slightly more than three inches a year—and there is no indication that the rate is decreasing.
Mosaic resistance: Transferred from wild tobacco to cultivated varieties through science of genetics
by Roy E. Clausen
| Full text HTML  | PDF  
Not available – first paragraph follows: Varieties of cultivated tobacco are almost invariably susceptible to mosaic, a virus disease, which also may infect tomatoes and some other crop plants.
Not available – first paragraph follows: Varieties of cultivated tobacco are almost invariably susceptible to mosaic, a virus disease, which also may infect tomatoes and some other crop plants.
Improving tomato fruit set: Use of hormone spray treatment for improvement of fruit set for spring and early summer harvest
by P. A. Minges, L. K. Mann
| Full text HTML  | PDF  
Not available – first paragraph follows: Local experience on the results of hormone treatment can be obtained from the Farm Advisors' ofices. Staff members of those ofices coiiperated in the studies reported here.
Local experience on the results of hormone treatment can be obtained from the Farm Advisors' ofices. Staff members of those ofices coiiperated in the studies reported here.
Tomato insects: Northern California investigations with chlorinated hydrocarbon insecticides
by A. E. Michelbacher, W. W. Middlekauff, N. B. Akesson, Frank Lamb
| Full text HTML  | PDF  
Not available – first paragraph follows: The 1948 season marked the end of the second year in which DDT and DDD insecticides were used extensively for the control of insects attacking tomatoes.
Not available – first paragraph follows: The 1948 season marked the end of the second year in which DDT and DDD insecticides were used extensively for the control of insects attacking tomatoes.
Treated wood stakes: Exposed Douglas fir and eucalyptus stakes require treatment for long life
by L. W. Neubauer
| Full text HTML  | PDF  
Not available – first paragraph follows: Simple and convenient methods for preservative treatment of redwood, Douglas fir and eucalyptus wood were tested with a total of seven different oils and chemicals in a 12-year study at Davis.
Not available – first paragraph follows: Simple and convenient methods for preservative treatment of redwood, Douglas fir and eucalyptus wood were tested with a total of seven different oils and chemicals in a 12-year study at Davis.
Irrigation of walnut orchards: Mature trees require large quantities of water daily throughout time they are in leaf
by A. H. Hendrickson, F. J. Veihmeyer
| Full text HTML  | PDF  
Not available – first paragraph follows: After walnut trees come into leaf they draw heavily upon the available supply of soil moisture.
Not available – first paragraph follows: After walnut trees come into leaf they draw heavily upon the available supply of soil moisture.
Yeast culture investigations: Live yeast culture tested for production efficiency as feedstuff for chicks
by C. R. Grau, M. Kamei
| Full text HTML  | PDF  
Not available – first paragraph follows: Yeast culture is being used as a poultry feedstuff in sections of southern California as part of the constant attempt to increase efficiencies of meat and egg production.
Not available – first paragraph follows: Yeast culture is being used as a poultry feedstuff in sections of southern California as part of the constant attempt to increase efficiencies of meat and egg production.
Fluid milk production: State's human population up 300% but dairy cow population up only 50%
by W. M. Regan
| Full text HTML  | PDF  
Not available – first paragraph follows: Fluid milk must be produced near the point of consumer markets.
Not available – first paragraph follows: Fluid milk must be produced near the point of consumer markets.

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