Topics in Subtropics

Statewide IPM Program staff members work closely with area IPM advisors, farm advisors, specialists, and researchers to develop educational programs that reflect the newest advances in pest management. These online courses are FREE.

The Citrus Research Board in conjunction with the University of California Cooperative Extension (UCCE) held their annual grower seminar on Tuesday, June 30, 2015 at the University of California, Riverside (UCR) Palm Desert Center.

. A rule of thumb is that irrigation should be done when about 50% of the water has been depleted from the soil in the plant's root zone. This 50% value, however, allows a buffer of water in the soil in case the weather suddenly turns hot and windy.

Irrigation timing can be determined more precisely using a tensiometer. These water-filled tubes with a pressure gauge accurately reflect the amount of energy a plant needs to extract water from the soil. The pressure gauge measures tension values in centibar units (cbars).

Avocados and Water Avocados are the most salt and drought sensitive of our fruit tree crops. They are shallow rooted and are not able to exploit large volumes of soil and therefore are not capable of fully using stored rainfall.