Topics in Subtropics

Water prices in San Diego County continue to increase and there is no end in sight, especially with periodic drought years and California losing some share of its Colorado River water.

Introduction Foliar fertiliser application is sometimes promoted as an effective means of supplying nutrients to avocado.

Since 1910, the Citrus Variety Collection has been a resource for research, citrus breeding and educational extension activities initially for the UC Citrus Experiment Station and now for the expanded College of Natural and Agricultural Sciences at UC Riverside.

This little mnemonic, or memory aid, in the title is helpful in remembering the critical levels of toxic constituents in irrigation water.

Biological control of Phytophthora cinnamomi in avocado through the use of mulches was identified by an Australian grower and later described as the "Ashburner Method" by Broadbent and Baker. The technique uses large amounts of organic matter as a mulch along with a source of calcium.