Spread of tristeza on citrus: Melon aphid relatively inefficient carrier of quick decline virus but at its height can ruin orchard in about five years
AuthorsR. C. Dickson
R. A. Flock
E. F. Laird
Authors AffiliationsR. C. Dickson is Associate Entomologist, University of California, Riverside; R. A. Flock is Assistant Entomologist, University of California, Riverside; E. F. Laird, Jr., is Senior Laboratory Technician in Entomology, University of California, Riverside.
Hilgardia 10(10):4-4. DOI:10.3733/ca.v010n10p4. October 1956.
Only five minutes are required by the melon aphid—Aphis gossypii Glover— after feeding on a diseased citrus tree, to transmit the tristeza—quick decline— virus to a healthy tree. However, the aphid does not remain infective long— probably most individuals lose their ability to transmit the virus shortly after leaving the diseased tree—and apparently only an occasional individual aphid is able to transmit the virus at all.
Also in this issue:Lemon industry in California: Long-term projection of market potential for lemon juice products based on variable determinants of summer demand
Timing oil spray on valencias: Study indicates influence of application timing on effect of pest control oil spray on yield and juice of Valencias
Growth regulators on apricot: Seeds from apricot trees treated with growth regulators are inhibited in germination and any seedling growth is abnormal
Soil fungi and seedling growth: Citrus tree growth and soil population relationships being studied in series of greenhouse tests underway at Riverside
Parasites of alfalfa aphid: Natural enemies of spotted alfalfa aphid found in search of Europe and Middle East may become established in California
Range rodent control by plane: Cereal bait scattered by plane at rate of one pound or less per acre prior to seeding effectively controls range rodents
Application of meat tenderizer: Precooking holding periods for beef treated with tenderizers using papain as the activating agent found to be unnecessary
Performance of crossbred ewes: Study made of four types of first-cross ewes to evaluate use of rams of medium-wool, dual-purpose breeds for replacements
Potato hair sprout: Disorder of potatoes causes problem for processors and seed producers
The herbicidal properties of boron compounds
Some effects of thallium sulfate upon soils
Toxicity of arsenic, borax, chlorate, and their combinations in three California soils