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Table 4 Inhibitory activity of the crude cultural filtrates of biocontrol agents against Pectobacterium carotovorum subsp. Carotovorum strains, when artificially inoculated on potato tuber slices, in vivo tests

From: Biological control of Pectobacterium carotovorum subsp. carotovorum, the causal agent of bacterial soft rot in vegetables, in vitro and in vivo tests

Biocontrol agents Soft rot symptoms
2 h. before inoculation At the same time 2 h. after inoculation
Pcc3 Pcc4 Pcc5 Pcc3 Pcc4 Pcc5 Pcc3 Pcc4 Pcc5
Bacterial agents
Bacillus subtilis  +  + *  +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  + 
Bacillus pumilus - -  +  +  +   +  +  +  -  +  +  +  -  +  +  +   +  +  + 
Bacillus megaterium - -  +  +  +  - -  +  +  +   +  +  +  -  +  +  + 
Pseudomonas fluorescens - - - - -  +  +  +  -  +  +   +  +  + 
Fungal agents
Trichoderma harzianum  +  +  +  - - - -  +  +  +  - -  +  +  + 
Trichoderma viride  +  +  +  -  +  +  +   +  +  +  - - - -  +  +  + 
Trichoderma virens  +  +  +   +  +  +  -  +  +  +  - - - -  +  + 
Pathogen only
P. c. subsp. carotovorum only  +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  +   +  +  + 
Untreated control
Water only -
  1. *-No rotting
  2.  + Restricted rot < 1 cm
  3.  +  + Small active rot 1-2 cm
  4.  +  +  + Highly active rot > 2 cm
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