Ventura county survey finds little avocado root rot
AuthorsR. M. Burns
R. W. Kover
C. C. Delphey
K. D. Gowans
G. A. Zentmyer
Authors AffiliationsR. M. Burns is Extension Horticulture Technologist, University of California, Riverside; R. W. Kover is Soil Scientist, U. S. Soil Conservation Service, Moorpark; C. C. Delphey is Farm Advisor, Ventura County; K. D. Gowans is Extension Soil Specialist, U. C., Davis; G. A. Zentmyer is Plant Pathobgist, U. C., Riverside. Laboratory Technicians.
Hilgardia 18(2):11-11. DOI:10.3733/ca.v018n02p11. February 1964.
All of Ventura county's 2,900 acres of avocados is in the southern half of the county, with the majority in the Santa Clara Valley-Oxnard Plain and the Las Posas Valley-Camarillo areas. Most of the avocados are growing in 17 different soil series, but over 25 soil series are involved. Fortunately, avocado root rot has been found in only 21 locations and has damaged a total of only 21 acres. Since many avocados are growing on restricted or poorly drained soils, it is fortunate that the root rot fungus, Phytophthora cinnamomi, has not been spread very widely in the county.
Also in this issue:Effects of predators on control of pear psylla
Effects of sulfur on five annual grassland species
A progress report: Redesigning pear trees for mechanical harvesting
Lygus bug control during flowering in dry lima beans
Phosphorus - deficiency - induced dormancy symptoms in alfalfa
Precision tillage for cotton beneficial on coarse-textured soils, but not on clay
Minimum tillage for cotton
Soil moisture affects photosynthesis
Astringency of fruit and fruit products in relation to leucoanthocyanin content
Chemical fallow aids perennial grass establishment
Herbicidal properties of oils