Co-Authors:
Thomas, P.E., U. S. Department of Agriculture, Washington State University, Irrigated Agriculture Research and Extension Center, Prosser, WA 99350, United States
Marco, S., Volcani Research Center, Bet Dagan, Israel
Reisenhauer, G., Washington State University, Irrigated Agriculture Research and Extension Center, Prosser, WA 99350, United States
Abstract:
Studies were conducted to determine whether marking aphids with fluorescent powders would affect aphid processes and activities that could influence their role in the epidemiology of virus diseases. Aphids were dusted with fluorescent powders while they infested source plants. The powders readily adhered to the exoskeltons of four aphid species: Myzus persicae Sulzer (green peach aphid), Aphis gossypii Glover (cotton aphid), Aphis fabae Scopoli (bean aphid), and Aphis cracciuora Koch (cowpea aphid). The dusted aphids then were easily identified at a later date by their fluorescent glow under ultraviolet light. The powders had no perceptible effect on plants or on the dispersal behavior of the green peach aphid. In flight chambers, about the same percentage of labeled and unlabeled green peach aphid alatae took flight, and their preference for white, yellow, or gray at landing was not affected as compared with unmarked aphids from the same population. Marking green peach aphid apterae did not affect aphid fecundity, longevity, movement to and among plants, or capacity to acquire and transmit potato leafroll virus. The powders were rinsed from plants after 3 h of sprinkler irrigation but not from aphids. We conclude that marking aphids with fluorescent powders could be a suitable method to trace dispersal patterns of both alate and apterous aphids and could be useful as a tool for elucidating the epidemiology and control of aphidborne virus diseases.
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