seenhaigus võõrasemadel kui lehtedele ülaküljele ilmuvad pruunikas-purpursed laigud ja nende all, allküljel hall eoskirme
the fungal disease
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on the undersides of leaves with no symptoms above, soon, upper surfaces of infected leaves show areas of slightly chlorotic discoloration, a light gray-brown, felt-like growth is on the undersides of infected leaves, infected tissues become necrotic, and eventually leaves die