2,4-D Damage to young citrus: Young lemon, orange, and grapefruit trees may be severely damaged by direct application of, or by the drift of 2,4-D
Authors
E. C. CalavanT. A. DeWolfe
L. J. Klotz
Authors Affiliations
E. C. Calavan is Associate Plant Pathologist, University of California, Riverside; T. A. DeWolfe is Assistant Specialist in Plant Pathology, University of California, Riverside; L. J. Klotz is Professor of Plant Pathology, University of California, Riverside.Publication Information
Hilgardia 10(4):13-14. DOI:10.3733/ca.v010n04p13. April 1956.
PDF of full article, Cite this article
Abstract
About 5,000 young citrus trees—less than six years old—in the major citrus areas of California have been ruined or killed by 2,4-D within the past 10 years. Most of the injured trees were lemons, but extensive damage to young orange and grapefruit trees has been observed. Severe damage has been found on only a few trees more than six years old.
Calavan E, DeWolfe T, Klotz L. 1956. 2,4-D Damage to young citrus: Young lemon, orange, and grapefruit trees may be severely damaged by direct application of, or by the drift of 2,4-D. Hilgardia 10(4):13-14. DOI:10.3733/ca.v010n04p13
Also in this issue:
Fluid milk price control: Dynamic industry provided with means of maintaining orderly relationships through mechanism of Bureau of Milk ControlSeed treatment of lima beans: Combination fungicide-insecticide seed treatments protect plants against soil-borne pests and permit increased yields
Growth regulators on beans: Studies in southern California indicate properly applied sprays may increase yields of dry limas under some conditions
Blackberry yields increased: Growth regulator sprays tested on Boysen, Olallie, and Thornless Logan varieties in San Diego County in 1955
Prune size affected by 2,4,5-T: Erratic response in fruit size obtained after experimental treatment of mature trees with sprays of growth regulator
Growth regulators on apricots: Tests with several regulators indicate 2,4,5-T is best for increasing size, hastening maturity, controlling fruit drop
Enemies of spotted alfalfa aphid: Lady beetles, hover flies, lacewings are there important native predators of aphids and other economic pests of alfalfa
Frosted scale on walnuts: Codling moth treatment, DDT drift from adjacent crops interfere with control of the pest by natural enemies
Effect of oil spray on California red scale at various stages of development