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Sieve tube necrosis in the rootstock phloem of some chlorotic and declining avocado trees


Sieve tube necrosis in the rootstock phloem of some chlorotic and declining avocado trees



Phytophylactica 6(3): 149-152



A sieve tube necrosis in young declining avocado trees is described. The possibility that this abnormality might be a contributing factor to avocado decline is discussed. Phytophthora cinnamomi, the causal organism of root rot in avocados, was found in the root zone of all trees studied, and may have contributed to their decline. The apparently normal graft unions of prematurely declining trees without external sunblotch virus symptoms were investigated.

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Accession: 000192816

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