Abstract
SUMMARYThe results are given of laboratory experiments on the effect of variation in wind velocity upon the flight of Myzus persicae Sulz.When no wind passed through the experimental chamber, twenty‐five winged aphides averaged 154‐8 flights per minute. The incidence of flight in a range of wind velocities is recorded. Low wind velocities had a marked influence on flight which ceased when the speed of the wind was increased to 3–75 m.p.h.The aphides remained stationary on the glass surface of the chamber when high winds of 20 and 30 m.p.h. passed through the chamber and even when the full force of the wind, equivalent to a gale of 70 m.p.h., passed over them the aphides adhered to the surface with ease. Microscopical observation showed that the aphides possess a small membranous pad between each claw and another at the base of each tarsus; these are adpressed to the surface and facilitate adherence.The literature on the subject of the dissemination of aphides by wind is reviewed and the phenomenon of voluntary migration as compared with involuntary transportation is discussed.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
