SummaryThe tomato disorder known as silvering or chimera is described. It is apparently non-transmissible and is not associated with any pathogen. Plants do not show symptoms until they reach a critical age which seems to depend on the conditions under which they have been grown. The disorder occurs most frequently in plants from autumn sowings. This appears to be due in part to the lower temperatures which occur during winter propagation. Sideshoots are less affected by silvering than the main axis and this may provide growers with a means of reducing the frequency of the disorder.
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Grimbly et al. (1977) studied this question.
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