Stink bugs have become a major problem in current B.t. varieties (BG) of cotton, because of reductions in insecticides that also provided coincidental control of these bugs. Current intervention thresholds for stink bugs in cotton are based on field-sampling with a beat cloth to determine population levels and/or hand-picking of ½ grown bolls to assess internal damage in the form of punctures, warts and seed/lint staining. Since growers and consultants are reluctant to routinely use these cumbersome and time consuming techniques, applications of insecticides are often made before bugs are present or after economic damage has occurred. An electronic nose was used to characterize chemicals elicited from stink bugs, damaged and undamaged cotton bolls. The result showed that E-nose could accurately identify stink bug damaged bolls approximately 90 percent of the time. Volatile chemicals produced by stink bugs were identified using a GC/MS machine. Also, the E-nose was trained to identify stink bugs (presence) smell prints. There was a strong correlation between the number of sting bugs in a sampling flask and the E-nose sensors response. A Collection Chamber for collecting and identifying the volatiles from healthy and damaged cotton plants was developed. The chamber is mounted on an adjustable-height table for sampling cotton plants in the field.