Effect of Commercial Cyanobacteria Products on the Growth and Antagonistic Ability of Some Bioagents under Laboratory Conditions

Table 2

Effect of algal compounds on the viability of some antagonistic bacteria and yeast in vitro.

Algal compounds	Concentrations (%)	Antagonistic bacteria and yeast
		B. subtilis		P. fluorescens		S. cerevisiae
		CFU	𝑅 (%)	CFU	𝑅 (%)	CFU	𝑅 (%)
Control	0.0	148^∗a	0.0**	157^*a	0.0	142^*a	0.0
Weed-Max	0.5	148^a	0.0	157^a	0.0	142^a	0.0
	1.0	137^b	7.4	139^b	11.4	135^b	4.9
	2.0	125^c	15.5	128^c	17.4	127^c	10.5
Oligo-X	0.5	148^a	0.0	157^a	0.0	142^a	0.0
	1.0	134^b	9.4	136^b	13.3	137^b	3.5
	2.0	122^c	17.5	125^c	20.3	123^c	13.3

Mean values within columns followed by the same letter are not significantly different (𝑃≤0.05).
*CFU: no. of colony formed unit (1×10⁴/mL).
** 𝑅: reduction in fungal growth calculated relatively to bacterial and yeast growth in control (free of algal extracts).