Archives

2015 (University of California UPLAND / ACALA VARIETY TRIAL) – Shafter

 

2015 (University of California UPLAND / ACALA VARIETY TRIAL)
Seed cotton yields, lint percent, gin turnout percent, lint yields

Questions?
Contact: Bob Hutmacher, (Univ. CA)
Cell: (559) 260-8957
email: rbhutmacher@ucdavis.edu

Cooperative Project by: 1/18/2016 version
University of California Cooperative Extension (UC-ANR) / Univ. CA Davis Plant Sci. Dept./ Univ. CA West Side REC
Funding by: CA Cotton Growers Assoc., CA Cotton Alliance, Cotton Incorporated, UC-ANR / UCCE, UCD Plant Sciences
Cooperators: multiple growers, Steve Wright, Dan Munk, Mark Keeley, Raul Delgado, Tarilee Frigulti, Nick Clark, Bill Weir, Brian Marsh, SJV Quality Cotton Growers Assoc – Shafter, UCCE Tulare, Kings, Fresno, Kern, Merced Co.’s
LOCATION: SHAFTER (Kern County)
HARVEST DATE: 11/09

 

Download full copy of Research here

California Uplands Advanced Strains Screening Trials

 

Changes in the California cotton industry enacted in 1998 allow for a much broader range of varieties to be grown in the SJV. It will be important for growers to have unbiased sources of varietal performance information that will answer some of the questions regarding yield performance, growth characteristics and quality of available varieties. These trials involving newly-available CA Upland varieties complement the combined SJV Cotton Board and the UCCE Farm Advisor Approved Acala studies. Trials include standard varieties of Acalas in order to have some more complete indices of varietal comparisons. The range of yield potential as well as the range of quality characteristics across the varieties now available will mean that growers have an even more difficult job than usual in balancing the combination of yield and quality (and resulting price)…

 

Download full copy of Research here

CALIFORNIA UPLAND COTTON ADVANCED STRAINS VARIETY TRIALS

 

2006 Activities- at Shafter and West Side REC sites. This testing program is maintained for nonAcala Upland cotton varieties at both the UC Shafter and UC West Side Research and Extension Centers in small plot trials which have been conducted since 1998 in response to requests for continuing information on varieties outside of the Approved Acala testing program. The project investigators are appreciative for the participation by seed companies and the UC Research Centers in providing support for ongoing testing ofnon-Acala Uplands. The actual varieties included in 2006 trials are shown in Table 1, but yield and lint quality data will not be available on 2006 studies until December 2006. Summary results will be posted on our UC cotton web site: http:llcottoninfo.ucdavis.edu and in a January 2007 issue of the California Cotton Review…

Download full copy of Research here

Population development, selection, and evaluation for heat stress.

 

Summary:
Cotton is routinely grown in the hot, irrigated areas of the far Western U.S., and these extended periods of high temperature can reduce cotton ( Gossypium hirsutum L. and G. barbadense) lint yield, even with adequate irrigation conditions. Extended periods of extremely high temperatures are common in these areas during the critical stage of peak flowering. When temperatures in the San Joaquin Valley reach temperatures above normal during the critical stage of peak flowering, California growers suffer the consequences of reduced yield by these cotton varieties weaknesses to heat. The number of cotton commercial varieties for California with heat tolerance is not really known. However, it is known that Acala varieties Maxxa and Phytogen 72 yield poorly in the heat stress environment of…

 

Download full copy of Research here

Western cotton (Acala, Upland, and Pima) germplasm enhancement for agronomic, fiber traits, and pest resistance

 

Summary:

Since the re-establishment of the USDA-ARS, WICS, genetic/breeding program, we have been focusing on bringing germplasm from any possible source available to us in order to increase genetic diversity. Most of the time, the genetic diversity in the cotton crop is used as an indicator to recognize potential threats to sustaining high yields. In the last couple of years, several troubling developments have recognized Fusarium oxysporum f.sp. vasirifectum (FOV) Atk. Sny & Hans as a recurring and potentially expanding threat to cotton production. The vulnerability of cotton production to this pathogen highlights the need for comprehensive research to protect the cotton industry from FOV, both from virulent populations which may be introduced and new virulent strains arising from within cotton production areas. Until recently, only race 1 and race 2 were known to occur in the United States (DeVay, 1986; Smith et al., 1981). UC scientists have recently identified race 4 ofFOV in cotton plants…

Download full copy of Research here

UPLAND COTTON VARIETAL RESPONSE TO SHORT-SEASON VERSUS LONG-SEASON MANAGEMENT PRACTICES

 

1998 was a year which brought many changes in the variety situation in the CA cotton industry. Many o f the management recommendations currently in place for CA Upland cotton are based upon years of research on varieties such as SJ-2, GC-510 and Maxxa. The introduction of some potentially widely-different varieties which were developed in environments outside of CA in most cases represents a real challenge in terms o f identifying the most suitable management practices for best results under SJV conditions. These “newly-available” varieties that will come into CA will have the name designation “CA Upland”…

Download full copy of Research here

SJV COTTON BOARD ACALA, PIMA AND UPLAND TESTING PROGRAM- 1998

 

The unprecedented weather conditions of 1998 dominated the season. With abnormally cold temperatures both in the spring and in the fall, the most abbreviated growing season ever experienced took a heavy toll on production. Even with a full month delay in harvest, many bolls failed to open – a result of too few heat units to mature the late set. In these tests average yields of all carry-over entries were more than a bale an acre below that of the same variety the year before. In general, quality was not detrimentally affected, but because of the exceptionally adverse conditions varietal relationships, especially as it relates to yield, are not necessarily what might be expected in a more normal year…

 

Download full copy of Research here