Debugging is typically done by the developer using the 
source code and make sure that the functionality is 
testable.
Manual Testing is done by the QA Tester to verify that the 
functionality is working as per the functional 
specifications and BRDs.

debugging means. running the program finding errors and 
fixing them

testing means, running the program, finding errors and 
reporting the bugs

Debugging is nothing but the process identifying and 
correcting the bug.
Manual testing .it is nothing but the process of 
identifying the bug.

Debugging we have to use java techinal words to correct the 
error.

Testing we dont use any java techinal words,it's done by 
tester.

Debugging is nothing but the process of verifying and 
correcting the causes of software failour.
Manual tesing is a process of finding errors under some 
control conditions these condition can be normal and 
abnormal.


Plz correct me if i m wrong...
Regards..
Lokesh Kumar Chauhan 
lokesh_kumar_chauhan@yahoo.com
Mobile - 09350229669
Noida

from testing side....
Debugging means check the out-print on interface console to
identify the exact error & can report the exact defect the
the actual execution of code

Manual testing means without knowledge on coding doing only
functionality testing, reporting the defect also w.r.t.
front-end

 Debugging is localization of the bug/error and fixing it. 
Debugging is performed by developers.

Manual testing is manually executing an application with 
the intention of finding defects. And verifying whether the 
application is working as intended. It is performed by 
developers or testers(mainly testers).