SUMMARY Few Myzus persicae settled on polygodial (1 g litre ‐1 ) or dodecanoic acid (5 g litre ‐1 )‐treated leaves and few nymphs were deposited. Polygodial decreased acquisition of the semi‐persistent beet yellows virus and the non‐persistent potato virus Y and dodecanoic acid that of the persistent potato leafroll and beet mild yellowing viruses, of beet yellows virus and of the bimodally‐transmitted cauliflower mosaic virus. However dodecanoic acid increased the acquisition of potato virus Y.
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Gibson et al. (1982) studied this question.
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