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Cotton Planting Forecast

 

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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…

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Management of Key Cotton Arthropod Pests with Insecticides and Acaricides

INTRODUCTION

Integrated pest management of California cotton insect and mite pests is based on a long record of successful research and implementation. Maintaining cost-effective and efficacious insecticides and miticides is a constant, evolving process. As the pest biology, cropping patterns, cotton varieties, production techniques, and other factors change in the cotton agroecosystem, pest management needs change. The development of resistance in pests and regulatory actions are two of the key actions that influence the availability of crop protection tools. Fortunately, new materials are developed to facilitate control and to compensate for these losses. Regulatory actions with pesticides are ongoing and appear inevitable in California. Most recently, volatile organic compound (VOCs) issues have surfaced and regulations to restrict many…

 

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UCCE APPROVED ACALA VARIETY TRIALS

 

1998 Studies
Eleven approved Acala varieties were planted in tests in 1998. Varieties included the standard, Maxxa, plus Phytogen-33, SJ-2, GC-510, Royale, DPL-6204, GC-535, C-141, GTO Maxxa, GC-500 and DP-6211. Tests were located in each ofthe six San Joaquin Valley cotton-producing counties, plus the Shafter and West Side Research and Extension Centers of the University of CA. Tests in grower fields were large scale, with individual entries grown in 6 to 8 row width plots averaging 1300 feet or more in row length. All studies had 4 replications in a randomized complete block design. Studies at West Side and Shafter locations were smaller, with plots 4 rows in width by 300 feet length…

 

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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…

 

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LONG-TERM NITROGEN MANAGEMENT TRIALS

 

The response o f Acala cotton in California to a range o f applied nitrogen treatments are under investigation in a multi-year, multi-site experiment. Goals of the experiment are to identify crop growth and yield responses to applied nitrogen and to provide information to better assess the utility of soil residual N estimates in improving fertilizer management. Results obtainedd uring the first three years o f this project have shown positive responses to increases in applied N across the 50 to 200 lbs N/acre range…

 

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CA UPLAND VARIETY TRIALS – LARGE-SCALE AND SCREENING

Bob Hutmacher
.UCCE Extension Agronomist
Department of Agronomy and Range Science
UC Davis I Shafter REC
(661) 746-8020 I fax (661) 746-1619
rbhutmacher@ucdavis.edu

Cooperators: Ron Vargas, Steve Wright, Bill Weir, Bruce Roberts,
Dan Munk, Brian Marsh, Mark Keeley, Raul Delgado, Scott Perkins

1999 Studies

In 1999, studies are underway at nine locations in the San Joaquin Valley in tests run by our office in cooperation with the six San Joaquin Valley UCCE cotton Farm Advisors.  At the time of writing this report, we have limited data to report, since no final plant mapping data have been analyzed and we are still a way off from defoliation and harvest. Instead, the following will be a brief description of the type of testing program initiated for 1999, and data collection plans.

Two different types of studies are underway this year, (a) a large-scale plot study on grower fields to evaluate varieties in large plots, where adequate seed…

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Comparison of Subsurface Drip and Furrow Irrigation of Cotton on Very Sandy Soil Under Fusarium-Nematode Pressure

OBJECTIVES: To compare drip and furrow irrigation by measuring
the emergence, plant growth characteristics, yield, rate of plant die-off, and water use of Acala cotton on very sandy soil with a great deal of pressure from nematodes and Fusarium wilt.

PROCEDURES: This experiment was started in the Spring of 1989 on a 0.4-ha plot of uniform loamy sand soil.

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