Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/19/1998
Publication Date: N/A
Technical Abstract: Allergies to latex products have become a serious health problem. Guayule (Parthenium argentatum Gray) is a source of hypoallergenic latex. One method of harvesting guayule is to allow for regrowth for subsequent harvests, thus eliminating replanting costs. Data are lacking on the regrowth of germplasm lines. The objective of this experiment was to evaluate regrowth of three germplasm lines (AZ1, AZ2, and AZ3) and an unreleased breeding line (G7-14) following the harvest of one- and two-year old plants. Lines were transplanted in the spring of 1995 and 1996 at the University of Arizona Maricopa and Marana Agricultural Research Centers and harvested in the spring of 1997. Lines were monitored monthly for plants with regrowth, and plant height and width. All lines had good regrowth except AZ1. No differences were observed between locations or plant ages for regrowth. The greatest difference for plant height and width occurred between locations with no differences between plant ages. Regrowth of plants of AZ1 was smaller than the other lines.