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H REVIEW OF THE LITERATURE
MATERIALS AND METHODS
EXPERIMENTS AND RESULTS
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24 hours 24-hour access feeding Access Feed Class access feeding period acquisition feeding period acquisition periods adult green peach adult pea aphids aphid species aphids from Rhinelander BYDV California pea enation Class vations Determination died on previous efficiency enation mosaic virus euphorbiae excretion green peach aphid hemolymph Indicated Inoculation feeding periods insect died instar nymphs instar pea aphids instars and adults leafhoppers lost in transfer mean latent period minute or less N. Y. PEMV number of infections nymphs nymphs and adults Obser pea aphid strain pea enation mosaic PEMV isolate period of Calif Periods Hours persicae pisum PLRV potato and pea previous test plant reach the phloem respectively Rochow saliva salivary glands serial transfers Simons single adult green single first instar stylets Table titres of virus transfers of single transmission occurred transmitted PEMV vations After Initiation vector virus acquisition virus by serial WARF yellow dwarf