The pearleaf blister mite has been feeding on pear leaves all season. The damage it causes is minor even though the leaf below appears to be devasted by this mite. At this time of year there is no reason to spray as the leaves will be dropping soon anyway.
 |
| Under side of the leaf |
You can prevent this damage from being severe by treating your pear trees with a dormant oil spray in the spring just as the buds start to swell and the first hint of green appears. For a more indepth spray guide, check out the publication at
http://www.ext.colostate.edu/pubs/garden/02800.html.
 |
| Upper surface of the leaf. |
These mites live inside the leaf between the upper and lower surfaces. To see how they get into the leaf check out
http://swiftsgardeningblog.blogspot.com/2010/06/brown-spots-on-pear-leaves.html.
No comments:
Post a Comment