Feeding Activities of Perkinsiella Leafhoppers and Fiji Disease Resistance of Sugarcane12

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Abstract
An electronic measurement system was used to study the feeding activities of viruliferous and nonviruliferous Perkinsiella saccharicida Kirkaldy and P. vitiensis Kirkaldy on Fiji disease-resistant, intermediate-resistant, and susceptible varieties of sugarcane (Saccharum sp.) in Australia and Fiji. The mean % time of phloem ingestion by Viruliferous leafhoppers in a 2-h access period on a variety was correlated negatively with the resistance of that variety to the Fiji disease virus. P. saccharicida and P. vitiensis reacted similarly in their feeding activities on the same testing variety. The nonviruliferous leafhoppers fed mainly in the parenchyma while viruliferous ones fed in the phloem of a susceptible variety.