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Keywords: Upland; Variety Trials; Yields; Hutmacher; 2020; HVI; Data Summary
CA Cotton Growers & Ginners Association, CA Cotton Alliance, UC-ANR/UCCE, UC Davis Plant Sci. Dept., Cotton Incorporated State Support Committee
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Keywords: Pima; Variety Trials; Yields; Hutmacher; 2020; HVI; Data Summary
Download full copy of Research here
Keywords: Upland; Acala; Variety Trials; Yields; Hutmacher; 2020
Download full copy of Research here
Keywords: Pima; Variety Trials; Yields; Hutmacher; 2020
Introduction
Irrigation scheduling methods in the irrigated far west are not uniformly accepted and depend on irrigation system, production economics and the management investment the grower is committed to. Most current and successful methods use soil and/or plant-based measurements that are combined with regional estimates of ETa and Kc to calculate best irrigation timing. Growers that make use of the available technology find that the time and financial costs invested in making careful field evaluations improve farm economics. Seasonal cotton water use for optimum yields can exceed 750 mm (30 inches) with typical rainfall contributions less than 15 percent of total season water requirements. Crop water requirements are distributed unevenly across the season with very low ET observed in the 60 days following planting and peak ET observed 100 to 115 days after planting. The highest cotton water use period is from late June to mid August during peak-bloom with daily water use of slightly over 2.0 inches per…
Cotton Harvest Aid Management 2013
This report summarizes the applied defoliation research studies conducted during 2013. This was another unique season due to warm weather causing rapid progression of the cotton crop. Three research trials were conducted on Pima cotton at the Westside Research Center in Five Points, CA. These fields were planted with Phytogen 802RF on April 16, 2013 with a seed rate of 18 lbs/A. The fields received a pre-irrigation, three in-season irrigations, and pressure bomb readings were taken to better manage plant vigor. In addition, the fields received 140 lbs of nitrogen urea plus 14 lbs sidedress of Temik (Aldicarb) on May24, 2013. The fields also received 16 ounces of Mepex (Mepiquat Chloride) on June 19th and again on July 1, 2013. The plots were 65’ in length and consisted of four rows with 40” spacing. In each trial, each treatment had 4 replications.
The objective of these studies was to define the most appropriate conditions for effective defoliation and crop termination. New harvest aids and several tank mix combinations…
PROJECT SUMMARY
In California, Fusarium wilt of cotton has been considered a potentially serious fungal disease caused by the organism Fusarium oxysporum vas infectum (also called “FOV”). However, in the past, damage associated with Fusarium in SJV cotton has been notable only in production areas with the combination of: (a) moderate to high populations of a specific race of FOV (usually race 1 ); (b) soils witl1 a sandy or sandy loam texture; and (c) root knot nematodes present in high-enough populations to cause significant galling and root damage. Past research generally indicated that FOV damage was worst when both FOV inoculum and nematodes were present in relatively higl1 concentrations. Methods used in the past to limit damage to cotton associated with Fusarium wilt have been to avoid planting cotton in soils in which the combination of sandy or sandy loam texture is combined with the presence of root knot nematode, or grow cotton only infrequently…
Fusarium w.ilt of cotton in California has been considered a potentially serious fungal disease caused by the organism Fusarium oxysporum vas infectum (also called ”FOV”) for many decades in several areas of the San Joaquin Valley (SJV). In the past, however, damage associated with FOV in SJV cotton has been notable only in areas with the combination of: (a) moderate to high populations of one or more specific races of FOV (usually race 1 ); (b) soils with a sandy or sandy loam texture; and (c) where root lrnot nematodes were present in high-enough populations to cause some significant root damage. Past research generally indicated that FOV damage was worst when both FOV inoculum and nematodes were present in relatively high…