peach/nectarine tip disease- pics
my peach and nectarine trees have been suffering from something that causes the tips of the twigs to turn black and crusty- this then causes many of the twigs to suffer defoliation. on one of my peach trees, it has caused a significant number of twigs and even some smaller branches to die. a friend told me he thinks its winter die-back but it doesnt seem plausible to me. I think its some type of bug or disease problem. any ideas?
see tips of twigs defoliated
close up of blackened tips
cross section of blackened tip
split cross esction