Alias: The pear leaf blister mite, or pear rust mite. This is such a small pest that it is almost pointless to describe the physical characteristics. It is a small (too small to see with the naked eye ...

BOARDMAN – Oregon State University researchers combed a pear orchard Monday for a pest they can’t even see. But Mahmut Dogramaci and two student workers know the pear rust mites are there, so they ...

After 20 years, suddenly our ornamental pear trees (not Bradford but “Aristocrat”) are dropping leaves with red and black spots. What can we do? This is a new rust disease called pear trellis rust.