Research Article

Development of a Portable Electronic Nose for Detection of Cotton Damaged by Nezara viridula (Hemiptera: Pentatomidae)

Table 2

Mean (±SD) maximum change in resistance for various carbon black-polymer composite sensors in response to volatiles from undamaged and damaged bolls after 48 h using a 3, 6, and 11 s sample. Asterisks () indicate statistically significant differences between treatments (Student’s -test, unequal sample sizes, equal variance, 0.05 significance level).

SampleSensor numberControl [%]  
= 5
Damaged [%]  
= 4

3 s91.39 ± 1.360.349 ± 0.698
100.542 ± 0.2620.778 ± 0.423
41.40 ± 0.4091.50 ± 0.184
8

6 s91.76 ± 1.110.349 ± 0.698
100.542 ± 0.2620.845 ± 0.445
41.45 ± 0.3731.60 ± 0.107
8

11 s92.24 ± 1.580.795 ± 0.932
100.542 ± 0.2620.845 ± 0.445
4 1.45 ± .3731.60 ± 0.107
8