. 2019 Feb 5;10:60. doi: 10.3389/fpls.2019.00060

Table 2.

Crop parameters and cultivable epiphytic bacteria from lettuce plants treated and no treated with the three commercial products.

Treatment	index	weight (g/plant)	weight (g/leaf)	Aerobic cultivable bacteria [CFU (^∗10³)/g biomass]
	Leaf SPAD	Shoot fresh	Leaf fresh

				day after treatment	7 days after treatment
No-treated	18.0 ± 2.4^b	6.05 ± 0.28^b	1.03 ± 0.01^d	2.48 ± 0.03^b	1.11 ± 0.01^b
PE	24.6 ± 0.6^a	6.62 ± 0.20^a	1.23 ± 0.06^b	4.92 ± 0.02^a	0.92 ± 0.01^b
Cu-PH	19.9 ± 2.9^b	6.78 ± 0.14^a	1.27 ± 0.04^a	0.10 ± 0.05^c	17.90 ± 0.80^a
PH	25.3 ± 1.6^a	6.68 ± 0.21^a	1.19 ± 0.04^c	1.76 ± 0.05^b	0.98 ± 0.01^b
Significance^a	^∗	^∗∗	^∗∗	^∗∗	^∗∗

PE = tropical plant extract; PH = protein hydrolysate; Cu-PH = copper-based PH. Values ( ± SD) with no letter in common significantly differ at p ≤ 0.05 (Tukey HSD test).^a∗,^∗∗ Significant at P ≤ 0.05 and 0.01, respectively.