2 In vitro antifungal of antagonistic bacteria Bacillus megaterium strain No.16 against Rhizoctoniz solani isolate RSLPN-4 on PDA at 4 days after inoculation (DAI) in dual culture (A) and pour plate (B) tests. Optical micrographs of the inhibition of fungal growth by No.16 in dual culture at 4 DAI. The control culture with only R. solani isolate RSLPN-4 (C), and R. solani isolate RSLPN-4 mycelium from the edge of the inhibition zone. Dark arrows indicate hyphal deformation (10x)