Investigations of the Mechanism of the Transmission of Plant Viruses by Insect Vectors

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1939
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Abstract
When puncturing through a membrane into a fluid, Oicadulina mbila ejects saliva only when its stylets are in motion, and not when they are at rest and fluid is being drawn into them. This saliva sets to a gel and is moulded internally by the stylets to form a sheath. No other material of insect origin has been observed to flow from the stylets. The salivary glands of infective. insects, when inoculated int.o the abdomens of non-infective ones, caused a few of these to become infective. Comparative experiments with other organs from the insect support the interpretation that the salivary glands may contain virus, either in small quantities or occasionally.
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Bulletin, 127 (849), p. 526-543