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PHY 76 Pima: A New Leading Pima Variety for the San Joaquin Valley, CA

Joel F. Mahill, John W. Pellow, David M. Anderson, John Palmer and Scott Bordelon


ABSTRACT

Phytogen Seed Co. LLC has introduced a new mid-full season, conventional Pima variety that exhibits excellent yield potential in the major Pima growing region of the San Joaquin Valley, CA. PHY 76 PIMA was developed by the Phytogen Seed Co. breeding program at Corcoran, CA in the early 1990’s and is widely adapted from the southern tier to the central-west side of the San Joaquin Valley, CA. The key objective in developing PHY 76 was to develop a Pima variety which would capture the full- season potential of the SJV and product consistent high yield for western Pima growers. Agronomic practices have evolved in the SJV in recent years by which vegetative growth of Pima varieties is well managed by slight irrigation stress while retaining yield potentials. PHY 76 PIMA exhibits excellent response to this type of cultural practices and can potentially lead to input savings by less water usage. Generally, the earlier maturing Pima varieties are more sensitive to this stress management and yield potentials may suffer. Over four years of Advanced Strains Testing by Phytogen at nineteen test locations, PHY 76 yielded significantly more than Pima S-7 (the San Joaquin Valley Cotton Board standard Pima variety) by two hundred twenty one pounds of lint per acre (an increase of sixteen percent). In the same trials PHY 76 also yielded significantly more than the early variety HTO by 24%. PHY 76 fiber qualities are equal to that of Pima S-7 while fiber elongation is significantly improved. PHY 76 has a significantly larger boll and seed index than Pima S-7. PHY 76 exhibits a plant height 6-9 inches taller than Pima S-7 and resists late season premature cutout (senescence breakdown).





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Document last modified May 20, 2002