PLASTIC CONTAINERS for avocado nursery trees are relatively new in California, but nurserymen are showing increasing interest in them. One of the most popular avocado nursery containers for many years has been the tarpaper cylinder made from heavy roofing paper. These tarpaper containers have two main shortcomings: the relatively high labor cost of cutting and stapling; and frequent disintegration.

The following people assisted with this project: C. Delphey, Farm Advisor Emeritus; C. Gustafson and B. Lee, Farm Advisors in San Diego and Ventura counties, respectively; and the late W. Thorn, Laboratory Technician, University of California, Riverside. Avocado nurserymen W. Britt of Watsonville, W. Brokaw of Ventura, T. Gary and C. Go-fourth of Santa Paula, and E. Frey of Escondido also assisted in this study.