Woody spots in Bartlett pears

Asked September 5, 2018, 2:34 PM EDT

This year I noticed a lot of my Bartletts have brown patches on them which appear to have affected the development of the pears. Within the flesh there are little hard woody capsules from bb up to pellet sized. What were the factors that caused these spots and hard spots? I have 1 Bartlett pear tree in the back yard, and there are others nearby that don't seem to have the problem nearly as bad. Marc LaPine

Lane County Oregon

1 Response

May be one issue or two. Can you send photos to Jeff.Choate@oregonstate.edu?

Brown spots on the surface most often are scab: https://pnwhandbooks.org/plantdisease/host-disease/pear-pyrus-spp-scab

However, if the brown spots on the surface are associated with the hard areas within the flesh, then both may be the result of feeding by the Brown Marmorated Stink Bug: https://pnwhandbooks.org/insect/emerging-pest-brown-marmorated-stink-bug-threat-pacific-northwest-ag...
See also: https://pnwhandbooks.org/insect/tree-fruit/pear/pear-stink-bug

If the interior spots are not associated with the exterior spots, then scab is more likely the reason for the spots on the exterior, and cork spot (https://pnwhandbooks.org/plantdisease/host-disease/pear-pyrus-spp-cork-spot) is ore likely for the hard interior areas. Cork spot is the result of a calcium deficiency, much like bitter pit in apples and blossom end rot of tomatoes.

Photos would help, or you can bring some samples to the Extension office at 996 Jefferson Street in Eugene.