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Cultural and inoculation studies with jojoba leaf fungiYoung, Deborah Jean January 1979 (has links)
No description available.
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DEVELOPMENT OF SEQUENTIAL SAMPLING PLANS FOR PINK BOLLWORM IN LONG STAPLE COTTONBusacca, John Douglas January 1980 (has links)
The sampling dynamics of the pink bollworm (Pectinophora gossypiella (Saunders)) were studied during the cotton growing seasons of 1976, 1977, and 1978. Different sampling methods were employed each year to compare sampling intensity and to compare whole plant samples with susceptible boll samples. Analysis of variance data indicated that significant differences in mean boll infestation levels occurred between small areas of a field (ca. 1 acre), but that these differences were masked when larger units (ca. 10 acres) of a field were used as the sample area. From these data it was found that samples yielded the most accurate pink bollworm infestation estimate when taken from as large an area of the field as possible. Data indicated that accuracy improved only 2 to 3 percent when sample size increased from 60 bolls to 100 bolls. Bolls taken from whole plant samples were as accurate as susceptible boll samples if there was an equal number of bolls in each sample. Sample accuracy was nearly stable for fields 20 to 40 acres in size. A sequential sampling plan for pink bollworm was developed using the binomial distribution. Decision levels were established using the 6 and 12 percent boll infestation levels with α and β levels of 0.2. Approximately 50 percent of the sampling time can be saved over conventional 100 boll samples with very little loss of accuracy for a spray-no spray decision based upon an economic threshold value of 15 percent pink bollworm infestation.
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STUDIES CONCERNING PHYTOPHTHORA ROOT-ROT OF SAFFLOWER (CARTHAMUS TINCTORIUS L.)Berkenkamp, Bill Brodie, 1931- January 1962 (has links)
No description available.
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SOME BIOLOGICAL AND PHYSICAL PROPERTIES OF CITRUS VIRUSES, WITH PARTICULAR EMPHASIS ON STUBBORN DISEASEStorm, Leonard William, 1927- January 1963 (has links)
No description available.
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ORIGIN AND PHYSIOCHEMICAL STABILITY OF THE SAGUARO VIRUSYoshimura, Michael Akira, 1948- January 1975 (has links)
No description available.
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ETIOLOGY AND EPIDEMIOLOGY OF VIRUSES OF NATIVE CACTUS SPECIES IN ARIZONAMilbrath, Gene McCoy, 1941- January 1971 (has links)
No description available.
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ENZYME COMPOSITION OF VIRUS INFECTED CITRUS TISSUESMeister, Charles William, 1940- January 1972 (has links)
No description available.
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VERTICILLIUM WILT OF COTTON: STUDIES OF POSSIBLE SEED TRANSMISSIONAllen, Ross Marvin, 1917- January 1953 (has links)
No description available.
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The Pink Bollworm in ArizonaRoney, J. N., Wene, George 11 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
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Internal Boll-Rot of CottonBrown, J. G., Boyle, Alice M. 03 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
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