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Dieback and death of grapefruit (cv. Star Ruby) trees in orchard due to bot gummosis, caused by the canker pathogen Neoscytalidium spp.

View through the grapefruit orchard where some trees have scorched light-brown leaves, looking dead while other trees have green healthy-looking canopy. Credit: Themis J. Michailides, Kearney Agricultural Research and Extension Center, Parlier
Credit: Themis J. Michailides, Kearney Agricultural Research and Extension Center, Parlier
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