Star-K permits most canned fruit without a hechsher. From an article on the cRc web site by Tzvi Rosen, Star-K kashrut administrator:
“canned fruits can be purchased without kosher certification if the following conditions are met:
1. The fruits are packed in water, light or heavy syrup and do not have fruit juice listed as an ingredient;
2. They are not colored with natural colors; and
3. The fruits are not products of Israel.
“