What causes white leaf spots on trees?

Asked on 13.12.2018 in All Questions.
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Pseudocercosporella capsellae causes white leaf spot across a wide range of brassica plants including oilseed, vegetable condiment and forage brassicas worldwide. P. capsellae produces a purple-pink colored toxin called cercosporin, which have been implicated in white leaf spot disease initiation in brassica crops. P. capsellae may be carried across seasons within thick-walled mycelium on crop debris and produces conidia when the weather is favorable. Conidia infect plants causing white or pale beige lesions on leaves....
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