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California Agriculture, Vol. 24, No.4

Cover:  Good nutrition means good food and the purpose of ENEP - Agricultural Extension Service’s Expanded Nutrition Education Program - is to attack malnutrition nationwide with instruction for low-income groups on healthful eating habits. “Taste-ins” and “mini-gardens” help put across the story of ENEP-Youth program.
April 1970
Volume 24, Number 4

Research articles

CM 67 and Atlas 68… two new yellow-dwarf resistant barley varieties
by C. W. Schaller, C. I. Chim, J. D. Prato, W. H. Isom
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: BARLEY YELLOW DWARF, an apid-transmitted virus disease of small grains, has caused serious losses in barley, wheat, and oats in California since its sudden widespread outbreak in 1952. Although it had not been recognized prior to that time, yellow dwarf is now known to be a major disease in most of the small-grain-producing areas of the world.
Abstract Not Available – First paragraph follows: BARLEY YELLOW DWARF, an apid-transmitted virus disease of small grains, has caused serious losses in barley, wheat, and oats in California since its sudden widespread outbreak in 1952. Although it had not been recognized prior to that time, yellow dwarf is now known to be a major disease in most of the small-grain-producing areas of the world.
Ethrel sprays reduce number of pickings in hand-harvested cantaloupes
by K. Tyler, D. May, R. Miller
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: MUCH OF OUR PRESENT RESEARCH effort is directed towards mechanizing the harvesting of our California vegetable crops. This is as true for cantaloupes as it is for asparagus, lettuce, and fresh market tomatoes. Agricultural engineers and plant scientists generally agree that mechanical harvesting of cantaloupes on a commercial scale is still several years in the future. The principal obstacle to machine harvesting of cantaloupes has been the absence of a variety which will mature fruit of acceptable quality in a determinate manner so that the crop can be harvested in a single once-over operation much the way canning tomatoes are harvested.
Abstract Not Available – First paragraph follows: MUCH OF OUR PRESENT RESEARCH effort is directed towards mechanizing the harvesting of our California vegetable crops. This is as true for cantaloupes as it is for asparagus, lettuce, and fresh market tomatoes. Agricultural engineers and plant scientists generally agree that mechanical harvesting of cantaloupes on a commercial scale is still several years in the future. The principal obstacle to machine harvesting of cantaloupes has been the absence of a variety which will mature fruit of acceptable quality in a determinate manner so that the crop can be harvested in a single once-over operation much the way canning tomatoes are harvested.
Asparagus yields and plant vigor as influenced by time and duration of cutting
by F. H. Takatori, J. I. Stillman, F. D. Souther
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: THE LENGTH OF HARVEST SEASON for asparagus is frequently determined by economic factors or by factors other than a consideration of how the length will affect the plants and future performance. One of the most widely used practices is to terminate the harvest when the plants show a decrease in spear size. This termination is usually done arbitrarily and may occur after permanent damage to the field has taken place.
Abstract Not Available – First paragraph follows: THE LENGTH OF HARVEST SEASON for asparagus is frequently determined by economic factors or by factors other than a consideration of how the length will affect the plants and future performance. One of the most widely used practices is to terminate the harvest when the plants show a decrease in spear size. This termination is usually done arbitrarily and may occur after permanent damage to the field has taken place.
A research brief… potassium role found essential in stomatal functioning for plant life
by Editors
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: RECENT EXPERIMENTS have shed new light on two age-old and seemingly unrelated questions: why potassium is essential for plant growth; and how the stomata on leaves open and close.
Abstract Not Available – First paragraph follows: RECENT EXPERIMENTS have shed new light on two age-old and seemingly unrelated questions: why potassium is essential for plant growth; and how the stomata on leaves open and close.
Controlling fruit formation on olive and Victorian box with Off-Shoot-O and Ethrel
by Tok Furuta, Wes Humphrey, Richard Maire, Leo Yamamato
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: IT IS OFTEN DESIRABLE to prevent fruit formation on many ornamental plants to eliminate a hazard or a nuisance created by the ripe fruit. The fruits of olive (Olea europaea L.) and Victorian box (Pittosporum undulatum Vent.) are messy and unsightly, they stain concrete and other surfaces, and can cause people to slip. The long-term solution has been to introduce and use fruitless cultivars or male plants. This, however, does not eliminate the need for other control methods because many cultivars which set fruit can usually be found in the neighborhood.
Abstract Not Available – First paragraph follows: IT IS OFTEN DESIRABLE to prevent fruit formation on many ornamental plants to eliminate a hazard or a nuisance created by the ripe fruit. The fruits of olive (Olea europaea L.) and Victorian box (Pittosporum undulatum Vent.) are messy and unsightly, they stain concrete and other surfaces, and can cause people to slip. The long-term solution has been to introduce and use fruitless cultivars or male plants. This, however, does not eliminate the need for other control methods because many cultivars which set fruit can usually be found in the neighborhood.
Ragwort flea beetle established for biological control of tansy ragwort in Northern California
by Kenneth E. Frick
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: THE RAGWORT FLEA BEETLE, an insect from Europe that attacks the root crowns of tansy ragwort, Senecio jacobaea L., has been released near Fort Bragg and at Smith River, California. This insect, Longitarsus jacobaeae (Waterhouse), will supplement the earlier liberations by the Biological Control of weeds Investigations Laboratory, ARS, USDA, Albany of two other insects: the cinnabar moth, Tyria jacobaeae (L.), which feeds on the foliage, and the seed head fly, Hylemya seneciella (Meade), which attacks the seed in the flower heads (california agriculture, December 1969).
Abstract Not Available – First paragraph follows: THE RAGWORT FLEA BEETLE, an insect from Europe that attacks the root crowns of tansy ragwort, Senecio jacobaea L., has been released near Fort Bragg and at Smith River, California. This insect, Longitarsus jacobaeae (Waterhouse), will supplement the earlier liberations by the Biological Control of weeds Investigations Laboratory, ARS, USDA, Albany of two other insects: the cinnabar moth, Tyria jacobaeae (L.), which feeds on the foliage, and the seed head fly, Hylemya seneciella (Meade), which attacks the seed in the flower heads (california agriculture, December 1969).
Apple shape changing possible with cytokinin and gibberellin sprays
by G. C. Martin, D. S. Brown, M. M. Nelson
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Advertising has encouraged the consumer to buy elongated apples, although the shape of the apple has no bearing on its ultimate quality. The effectiveness of the advertising campaign has resulted in a premium price for elongated fruit. Several investigators in the past 50 years have attempted to explain why apples from some areas are more elongated than apples from other areas. Most investigators now believe that elongated fruit are produced in areas where temperatures are cool for about
Abstract Not Available – First paragraph follows: Advertising has encouraged the consumer to buy elongated apples, although the shape of the apple has no bearing on its ultimate quality. The effectiveness of the advertising campaign has resulted in a premium price for elongated fruit. Several investigators in the past 50 years have attempted to explain why apples from some areas are more elongated than apples from other areas. Most investigators now believe that elongated fruit are produced in areas where temperatures are cool for about
Six acaroids tested for control of two-spotted mites on Bartlett pears
by J. Blair Bailey, G. W. Morehead, C. S. Davis, H. A. Ewing
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: IN MID JULY, a heavily bearing six-year-old Bartlett pear orchard infested with two-spotted mites was offered to the Extension Service for the remainder of the season for the purpose of testing acaricides. Since the fruit from this orchard was not to enter commercial channels, it afforded an opportunity to test unregistered acaricides.
Abstract Not Available – First paragraph follows: IN MID JULY, a heavily bearing six-year-old Bartlett pear orchard infested with two-spotted mites was offered to the Extension Service for the remainder of the season for the purpose of testing acaricides. Since the fruit from this orchard was not to enter commercial channels, it afforded an opportunity to test unregistered acaricides.

News and opinion

People-izing agriculture
by E. C. Maxie
Full text HTML  | PDF  
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California Agriculture, Vol. 24, No.4

Cover:  Good nutrition means good food and the purpose of ENEP - Agricultural Extension Service’s Expanded Nutrition Education Program - is to attack malnutrition nationwide with instruction for low-income groups on healthful eating habits. “Taste-ins” and “mini-gardens” help put across the story of ENEP-Youth program.
April 1970
Volume 24, Number 4

Research articles

CM 67 and Atlas 68… two new yellow-dwarf resistant barley varieties
by C. W. Schaller, C. I. Chim, J. D. Prato, W. H. Isom
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: BARLEY YELLOW DWARF, an apid-transmitted virus disease of small grains, has caused serious losses in barley, wheat, and oats in California since its sudden widespread outbreak in 1952. Although it had not been recognized prior to that time, yellow dwarf is now known to be a major disease in most of the small-grain-producing areas of the world.
Abstract Not Available – First paragraph follows: BARLEY YELLOW DWARF, an apid-transmitted virus disease of small grains, has caused serious losses in barley, wheat, and oats in California since its sudden widespread outbreak in 1952. Although it had not been recognized prior to that time, yellow dwarf is now known to be a major disease in most of the small-grain-producing areas of the world.
Ethrel sprays reduce number of pickings in hand-harvested cantaloupes
by K. Tyler, D. May, R. Miller
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: MUCH OF OUR PRESENT RESEARCH effort is directed towards mechanizing the harvesting of our California vegetable crops. This is as true for cantaloupes as it is for asparagus, lettuce, and fresh market tomatoes. Agricultural engineers and plant scientists generally agree that mechanical harvesting of cantaloupes on a commercial scale is still several years in the future. The principal obstacle to machine harvesting of cantaloupes has been the absence of a variety which will mature fruit of acceptable quality in a determinate manner so that the crop can be harvested in a single once-over operation much the way canning tomatoes are harvested.
Abstract Not Available – First paragraph follows: MUCH OF OUR PRESENT RESEARCH effort is directed towards mechanizing the harvesting of our California vegetable crops. This is as true for cantaloupes as it is for asparagus, lettuce, and fresh market tomatoes. Agricultural engineers and plant scientists generally agree that mechanical harvesting of cantaloupes on a commercial scale is still several years in the future. The principal obstacle to machine harvesting of cantaloupes has been the absence of a variety which will mature fruit of acceptable quality in a determinate manner so that the crop can be harvested in a single once-over operation much the way canning tomatoes are harvested.
Asparagus yields and plant vigor as influenced by time and duration of cutting
by F. H. Takatori, J. I. Stillman, F. D. Souther
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: THE LENGTH OF HARVEST SEASON for asparagus is frequently determined by economic factors or by factors other than a consideration of how the length will affect the plants and future performance. One of the most widely used practices is to terminate the harvest when the plants show a decrease in spear size. This termination is usually done arbitrarily and may occur after permanent damage to the field has taken place.
Abstract Not Available – First paragraph follows: THE LENGTH OF HARVEST SEASON for asparagus is frequently determined by economic factors or by factors other than a consideration of how the length will affect the plants and future performance. One of the most widely used practices is to terminate the harvest when the plants show a decrease in spear size. This termination is usually done arbitrarily and may occur after permanent damage to the field has taken place.
A research brief… potassium role found essential in stomatal functioning for plant life
by Editors
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: RECENT EXPERIMENTS have shed new light on two age-old and seemingly unrelated questions: why potassium is essential for plant growth; and how the stomata on leaves open and close.
Abstract Not Available – First paragraph follows: RECENT EXPERIMENTS have shed new light on two age-old and seemingly unrelated questions: why potassium is essential for plant growth; and how the stomata on leaves open and close.
Controlling fruit formation on olive and Victorian box with Off-Shoot-O and Ethrel
by Tok Furuta, Wes Humphrey, Richard Maire, Leo Yamamato
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: IT IS OFTEN DESIRABLE to prevent fruit formation on many ornamental plants to eliminate a hazard or a nuisance created by the ripe fruit. The fruits of olive (Olea europaea L.) and Victorian box (Pittosporum undulatum Vent.) are messy and unsightly, they stain concrete and other surfaces, and can cause people to slip. The long-term solution has been to introduce and use fruitless cultivars or male plants. This, however, does not eliminate the need for other control methods because many cultivars which set fruit can usually be found in the neighborhood.
Abstract Not Available – First paragraph follows: IT IS OFTEN DESIRABLE to prevent fruit formation on many ornamental plants to eliminate a hazard or a nuisance created by the ripe fruit. The fruits of olive (Olea europaea L.) and Victorian box (Pittosporum undulatum Vent.) are messy and unsightly, they stain concrete and other surfaces, and can cause people to slip. The long-term solution has been to introduce and use fruitless cultivars or male plants. This, however, does not eliminate the need for other control methods because many cultivars which set fruit can usually be found in the neighborhood.
Ragwort flea beetle established for biological control of tansy ragwort in Northern California
by Kenneth E. Frick
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: THE RAGWORT FLEA BEETLE, an insect from Europe that attacks the root crowns of tansy ragwort, Senecio jacobaea L., has been released near Fort Bragg and at Smith River, California. This insect, Longitarsus jacobaeae (Waterhouse), will supplement the earlier liberations by the Biological Control of weeds Investigations Laboratory, ARS, USDA, Albany of two other insects: the cinnabar moth, Tyria jacobaeae (L.), which feeds on the foliage, and the seed head fly, Hylemya seneciella (Meade), which attacks the seed in the flower heads (california agriculture, December 1969).
Abstract Not Available – First paragraph follows: THE RAGWORT FLEA BEETLE, an insect from Europe that attacks the root crowns of tansy ragwort, Senecio jacobaea L., has been released near Fort Bragg and at Smith River, California. This insect, Longitarsus jacobaeae (Waterhouse), will supplement the earlier liberations by the Biological Control of weeds Investigations Laboratory, ARS, USDA, Albany of two other insects: the cinnabar moth, Tyria jacobaeae (L.), which feeds on the foliage, and the seed head fly, Hylemya seneciella (Meade), which attacks the seed in the flower heads (california agriculture, December 1969).
Apple shape changing possible with cytokinin and gibberellin sprays
by G. C. Martin, D. S. Brown, M. M. Nelson
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: Advertising has encouraged the consumer to buy elongated apples, although the shape of the apple has no bearing on its ultimate quality. The effectiveness of the advertising campaign has resulted in a premium price for elongated fruit. Several investigators in the past 50 years have attempted to explain why apples from some areas are more elongated than apples from other areas. Most investigators now believe that elongated fruit are produced in areas where temperatures are cool for about
Abstract Not Available – First paragraph follows: Advertising has encouraged the consumer to buy elongated apples, although the shape of the apple has no bearing on its ultimate quality. The effectiveness of the advertising campaign has resulted in a premium price for elongated fruit. Several investigators in the past 50 years have attempted to explain why apples from some areas are more elongated than apples from other areas. Most investigators now believe that elongated fruit are produced in areas where temperatures are cool for about
Six acaroids tested for control of two-spotted mites on Bartlett pears
by J. Blair Bailey, G. W. Morehead, C. S. Davis, H. A. Ewing
| Full text HTML  | PDF  
Summary Not Available – First paragraph follows: IN MID JULY, a heavily bearing six-year-old Bartlett pear orchard infested with two-spotted mites was offered to the Extension Service for the remainder of the season for the purpose of testing acaricides. Since the fruit from this orchard was not to enter commercial channels, it afforded an opportunity to test unregistered acaricides.
Abstract Not Available – First paragraph follows: IN MID JULY, a heavily bearing six-year-old Bartlett pear orchard infested with two-spotted mites was offered to the Extension Service for the remainder of the season for the purpose of testing acaricides. Since the fruit from this orchard was not to enter commercial channels, it afforded an opportunity to test unregistered acaricides.

News and opinion

People-izing agriculture
by E. C. Maxie
Full text HTML  | PDF  

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