Skip to main content

Table 2 Effect of radiation and sterilization methods on fungal contamination of cannabis plant samples

From: Effects of cold plasma, gamma and e-beam irradiations on reduction of fungal colony forming unit levels in medical cannabis inflorescences

Treatment

Experiment number

Sample type

Average CFU before treatment [log 10 CFU/g inflorescence]

Radiation dose [kGy]

Plasma exposure time [min]

Average CFU after treatment [log 10 CFU/g inflorescence]

Gamma irradiation

1

Uninoculated inflorescence

6.16 ± 0.26

7.5

0

1

Botrytis cinerea-inoculated inflorescence

8.05 ± 0.12

7.5

1.88 ± 0.96

2

Uninoculated inflorescence

6.04 ± 0.08

8.37

0

2

Botrytis cinerea-inoculated inflorescence

7.7 ± 0.11

8.37

3.02 ± 0.11

E-beam

1

Uninoculated inflorescence

6.16 ± 0.26

10.26

0

1

Botrytis cinerea-inoculated inflorescence

8.05 ± 0.12

10.26

0

2

Uninoculated inflorescence

6.04 ± 0.08

10.26

0

2

Botrytis cinerea-inoculated inflorescence

7.7 ± 0.11

10.26

1.75 ± 0.5

1

Naturally infected commercial inflorescence

5 ± 0.25

11.99

0.211 ± 0.1

2

Naturally infected commercial inflorescence

2.2 ± 0.47

11.99

0

1

Naturally infected commercial trimmed leaves

4.3 ± 0.03

11.99

0.314 ± 0.095

2

Naturally infected commercial trimmed leaves

5.27 ± 0.05

11.99

0.6 ± 0.48

Cold plasma

1

Uninoculated inflorescence

3 ± 0.08

10

0

2

Uninoculated inflorescence

2.81 ± 0.91

10

0.25 ± 0.25

2

Botrytis cinerea-inoculated inflorescence

7.82 ± 0.04

10

3.84 ± 0.08

Cold plasma with changing vacuum timea

1

Uninoculated inflorescence

6.6 ± 0.35

12.5 min + 10 min vacuum

0.25 ± 0.25

1

Botrytis cinerea-inoculated inflorescence

6.88 ± 0.11

10 min + 8 min vacuum

4.05 ± 0.31

  1. Abbreviations: CFU colony forming units, kGy kiloGray
  2. ain the cold plasma treatment with changing vacuum time, only one experiment was conducted