Skip to main content

Table 9 Effect of the treatment with the two different tested formulations on polyphenol oxidase (PPO) enzyme of citrus orchard

From: Characterization and insecticidal activity of two natural formulation types against the scale insect (Parlatoria ziziphi) and their biochemical effects on Citrus aurantium

Enzyme activity (U/g fresh w./h) Treatment Days after treatment   
Before spray 7 14 21  
EC Nano EC Nano EC Nano
PPO Control 10.98 ± 0.62 11.49 ± 1.22aa   11.89 ± 1.3a   11.44 ± 0.2a  
Active Cable 10.37 ± 0.76 5.73 ± 0.12c   5.89 ± 0.4c   6.06 ± 0.6f  
Laury 3% 11.00 ± 0.84 5.28 ± 0.87c 8.32 ± 0.24b 5.38 ± 0.8 cd 8.21 ± 0.2b 6.34 ± 0.3ef 8.05 ± 0.6bc
Laury 5% 10.02 ± 1.76 3.73 ± 0.28d 7.89 ± 0.83b 4.64 ± 0.6d 7.73 ± 0.8b 5.98 ± 0.6f 6.69 ± 0.3def
Artemisia 3% 10.34 ± 1.40 5.84 ± 0.65c 8.26 ± 0.83b 5.81 ± 0.7 cd 8.05 ± 0.7b 7.22 ± 0.2 cd 8.56 ± 0.8b
Artemisia 5% 10.13 ± 0.92 4.74 ± 0.65 cd 7.97 ± 1.03b 5.2 ± 0.7 cd 7.86 ± 0.6b 6.24 ± 0.2f 7.17 ± 0.7de
LSD0.05b NSc 1.29   1.24   0.86  
  1. Each value represents the mean of three replicates ± standard deviation
  2. aMeans with different letters within each interval were significantly different at the 0.05 level (Duncan’s multiple range test)
  3. bLeast significant difference at 0.05 level of probability
  4. cNon-significant difference at 0.05 level