The Shapag-hai looted many provisions in the final days of the War, and Hárskor fears they will not soon depart the Vales of Anduin unless their supplies are destroyed.
Hárskor told you the Shapag-hai looted many provisions in the final days of the War. What remains of the provisions have grown spoiled and rotten to the taste of Men, but they have only become more palatable to the Orcs. If the Shapag-hai are to be driven from Woodsedge, they must be deprived of their provisions.
Spoiled provisions can be found throughout Fil Sulmog.
You have discovered the spoiled provisions of which Hárskor spoke, and you should now destroy them.
You have destroyed many spoiled provisions at Fil Sulmog.