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Last fall's crop, which was a bumper crop, had this problem very bad. Previous years were not nearly so bad. His tree is not in the best location--between 2 houses--and his soil is very poor (crushed rock) builder's fill. Also I think he's not too meticulous about feeding his trees. So I guess logically it must be a nutrition issue with the tree.
Quote from: johnb51 on September 02, 2012, 01:45:04 PMLast fall's crop, which was a bumper crop, had this problem very bad. Previous years were not nearly so bad. His tree is not in the best location--between 2 houses--and his soil is very poor (crushed rock) builder's fill. Also I think he's not too meticulous about feeding his trees. So I guess logically it must be a nutrition issue with the tree.I think that's the problem right there. Between two houses where there is most rock and lack of feeding, so the combo might be leading to undesirable fruits.
It sounds like it may be Sclerocarpelosis:http://www.avocadosource.com/CAS_Yearbooks/CAS_65_1981/CAS_1981_PG_125-132.pdf