California Agriculture
California Agriculture
California Agriculture
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California Agriculture, Vol. 10, No.8

Timing 2,4-D sprays on grain or rice
August 1956
Volume 10, Number 8

Research articles

Citrus rejuvenation studies: Three basic soil treatments used in orchard investigations to determine best conditions for root growth and development
by O. C. Taylor, G. A. Cahoon
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Declining root systems comprise one of the most serious problems in southern California in citrus production and fruit size. Therefore, a station-wide citrus rejuvenation project was initiated in 1953.
Abstract Not Available – First paragraph follows: Declining root systems comprise one of the most serious problems in southern California in citrus production and fruit size. Therefore, a station-wide citrus rejuvenation project was initiated in 1953.
Drift of 2,4-D applied by plane: Better knowledge of wind direction and velocity as factors in drift contributes to reduction in number of damage suits
by H. B. Schulh, N. B. Akosson, W. E. Yaks, K. H. Ingebretsen
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The use of 2,4-D and related compounds to control weeds competing with grain and rice has resulted in an increased value of those crops to growers; but also it has resulted in damage suits filed by growers of crops susceptible to 2,4-D—cotton, grapes, tomatoes, and others—grown near rice or grain fields.
Abstract Not Available – First paragraph follows: The use of 2,4-D and related compounds to control weeds competing with grain and rice has resulted in an increased value of those crops to growers; but also it has resulted in damage suits filed by growers of crops susceptible to 2,4-D—cotton, grapes, tomatoes, and others—grown near rice or grain fields.
Isopropyl available for citrus: Registration of the isopropyl ester specifically for use as plant growth regulator on citrus permits this form of 2,4-D
by H. Z. Hield, L. A. Riehl, T. A. Do Wolfe
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The value of 2,4-D and related substances for preventing mature citrus fruit drop, for increasing fruit size, and for amending oil spray used for pest control to prevent leaf drop or fruit drop—or both—has been demonstrated.
Abstract Not Available – First paragraph follows: The value of 2,4-D and related substances for preventing mature citrus fruit drop, for increasing fruit size, and for amending oil spray used for pest control to prevent leaf drop or fruit drop—or both—has been demonstrated.
Temperatures and frost damage: Measurements of temperature inversions and blossom counts show extent of frost damage in tests in deciduous orchards
by F. A. Brooks, A. S. Leonard
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The effectiveness of all frost protection depends primarily on the temperature inversion—ceiling—but adequate measurements had not been made until an extensive field program was undertaken in northern California in the spring of 1956. Six thermographs equipped with 50' extensions were installed with other spot-climate recording stations in selected deciduous orchards. Several growers contributed to the project by keeping the thermographs in operation.
Abstract Not Available – First paragraph follows: The effectiveness of all frost protection depends primarily on the temperature inversion—ceiling—but adequate measurements had not been made until an extensive field program was undertaken in northern California in the spring of 1956. Six thermographs equipped with 50' extensions were installed with other spot-climate recording stations in selected deciduous orchards. Several growers contributed to the project by keeping the thermographs in operation.
Plant response to polluted air: Specific effects of air pollutants on plants vary according to plant species and modifying internal and external factors
by J. B. Kendrick, E. F. Darby, John T. Middleton, A. O. Paulus
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Field observations—and controlled fumigation experiments—have shown that plants differ in their response to atmospheric contamination by ethylene, herbicides, fluorides, sulfur dioxide, and smog, or oxidized hydrocarbons.
Abstract Not Available – First paragraph follows: Field observations—and controlled fumigation experiments—have shown that plants differ in their response to atmospheric contamination by ethylene, herbicides, fluorides, sulfur dioxide, and smog, or oxidized hydrocarbons.
Nutrition of date seedlings: Glasshouse tests with Deglet Noor variety in sand and soil cultures indicate which nutrients best stimulate growth
by A. R. C. Hoas, Joseph N. Brurca
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The date palm is a one seed-leaf— monocotyledonous—plant, and stock to be used for orchard plantings is usually obtained as offshoots from the parent palm.
Abstract Not Available – First paragraph follows: The date palm is a one seed-leaf— monocotyledonous—plant, and stock to be used for orchard plantings is usually obtained as offshoots from the parent palm.
Boron deficiency of grapes: Soil application at one ounce of borax per vine supplies enough boron for normal growth after midwinter pruning
by M. M. Barnes, W. W. Jones
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Vines develop abnormal growth if they bud out early following midwinter pruning—in certain vineyards in southern California—apparently because of insufficient boron at time of budding out.
Abstract Not Available – First paragraph follows: Vines develop abnormal growth if they bud out early following midwinter pruning—in certain vineyards in southern California—apparently because of insufficient boron at time of budding out.
Caterpillar damage to tomatoes: Results based on one-year survey indicate no evidence of resistance to insecticides in nine commercial tomato fields
by John Underhill, A. E. Micholbacher
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Suspected resistance to DDD and DDT in controlling caterpillars attacking tomatoes—the corn earworm, in particular—was investigated in San Joaquín County during the 1955 season.
Abstract Not Available – First paragraph follows: Suspected resistance to DDD and DDT in controlling caterpillars attacking tomatoes—the corn earworm, in particular—was investigated in San Joaquín County during the 1955 season.
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California Agriculture, Vol. 10, No.8

Timing 2,4-D sprays on grain or rice
August 1956
Volume 10, Number 8

Research articles

Citrus rejuvenation studies: Three basic soil treatments used in orchard investigations to determine best conditions for root growth and development
by O. C. Taylor, G. A. Cahoon
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Declining root systems comprise one of the most serious problems in southern California in citrus production and fruit size. Therefore, a station-wide citrus rejuvenation project was initiated in 1953.
Abstract Not Available – First paragraph follows: Declining root systems comprise one of the most serious problems in southern California in citrus production and fruit size. Therefore, a station-wide citrus rejuvenation project was initiated in 1953.
Drift of 2,4-D applied by plane: Better knowledge of wind direction and velocity as factors in drift contributes to reduction in number of damage suits
by H. B. Schulh, N. B. Akosson, W. E. Yaks, K. H. Ingebretsen
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The use of 2,4-D and related compounds to control weeds competing with grain and rice has resulted in an increased value of those crops to growers; but also it has resulted in damage suits filed by growers of crops susceptible to 2,4-D—cotton, grapes, tomatoes, and others—grown near rice or grain fields.
Abstract Not Available – First paragraph follows: The use of 2,4-D and related compounds to control weeds competing with grain and rice has resulted in an increased value of those crops to growers; but also it has resulted in damage suits filed by growers of crops susceptible to 2,4-D—cotton, grapes, tomatoes, and others—grown near rice or grain fields.
Isopropyl available for citrus: Registration of the isopropyl ester specifically for use as plant growth regulator on citrus permits this form of 2,4-D
by H. Z. Hield, L. A. Riehl, T. A. Do Wolfe
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The value of 2,4-D and related substances for preventing mature citrus fruit drop, for increasing fruit size, and for amending oil spray used for pest control to prevent leaf drop or fruit drop—or both—has been demonstrated.
Abstract Not Available – First paragraph follows: The value of 2,4-D and related substances for preventing mature citrus fruit drop, for increasing fruit size, and for amending oil spray used for pest control to prevent leaf drop or fruit drop—or both—has been demonstrated.
Temperatures and frost damage: Measurements of temperature inversions and blossom counts show extent of frost damage in tests in deciduous orchards
by F. A. Brooks, A. S. Leonard
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The effectiveness of all frost protection depends primarily on the temperature inversion—ceiling—but adequate measurements had not been made until an extensive field program was undertaken in northern California in the spring of 1956. Six thermographs equipped with 50' extensions were installed with other spot-climate recording stations in selected deciduous orchards. Several growers contributed to the project by keeping the thermographs in operation.
Abstract Not Available – First paragraph follows: The effectiveness of all frost protection depends primarily on the temperature inversion—ceiling—but adequate measurements had not been made until an extensive field program was undertaken in northern California in the spring of 1956. Six thermographs equipped with 50' extensions were installed with other spot-climate recording stations in selected deciduous orchards. Several growers contributed to the project by keeping the thermographs in operation.
Plant response to polluted air: Specific effects of air pollutants on plants vary according to plant species and modifying internal and external factors
by J. B. Kendrick, E. F. Darby, John T. Middleton, A. O. Paulus
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Field observations—and controlled fumigation experiments—have shown that plants differ in their response to atmospheric contamination by ethylene, herbicides, fluorides, sulfur dioxide, and smog, or oxidized hydrocarbons.
Abstract Not Available – First paragraph follows: Field observations—and controlled fumigation experiments—have shown that plants differ in their response to atmospheric contamination by ethylene, herbicides, fluorides, sulfur dioxide, and smog, or oxidized hydrocarbons.
Nutrition of date seedlings: Glasshouse tests with Deglet Noor variety in sand and soil cultures indicate which nutrients best stimulate growth
by A. R. C. Hoas, Joseph N. Brurca
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: The date palm is a one seed-leaf— monocotyledonous—plant, and stock to be used for orchard plantings is usually obtained as offshoots from the parent palm.
Abstract Not Available – First paragraph follows: The date palm is a one seed-leaf— monocotyledonous—plant, and stock to be used for orchard plantings is usually obtained as offshoots from the parent palm.
Boron deficiency of grapes: Soil application at one ounce of borax per vine supplies enough boron for normal growth after midwinter pruning
by M. M. Barnes, W. W. Jones
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Vines develop abnormal growth if they bud out early following midwinter pruning—in certain vineyards in southern California—apparently because of insufficient boron at time of budding out.
Abstract Not Available – First paragraph follows: Vines develop abnormal growth if they bud out early following midwinter pruning—in certain vineyards in southern California—apparently because of insufficient boron at time of budding out.
Caterpillar damage to tomatoes: Results based on one-year survey indicate no evidence of resistance to insecticides in nine commercial tomato fields
by John Underhill, A. E. Micholbacher
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Suspected resistance to DDD and DDT in controlling caterpillars attacking tomatoes—the corn earworm, in particular—was investigated in San Joaquín County during the 1955 season.
Abstract Not Available – First paragraph follows: Suspected resistance to DDD and DDT in controlling caterpillars attacking tomatoes—the corn earworm, in particular—was investigated in San Joaquín County during the 1955 season.

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