Efficacy of fluorescent Pseudomonas against tomato damping-off caused by Rhizoctonia solani Kuhn
1995
Tagal, S.C. | Lim, J.L. (Visayas State Coll. of Agriculture, Baybay, Leyte (Philippines). Dept. of Plant Protection)
The efficacy of flourescent Pseudomonas to control tomato damping-off caused by Rhizoctonia solani was evaluated under laboratory and screenhouse conditions. In vitro tests showed that flourescent Pseudomonas at 25, 45, 50, and 55 percent transmittance which corresponded to 294 x 10 to the eighth power, 283 x 10 to the sixth power, 251 x 10 to the sixth power colony forming units (cfu)/ml inhibited the mycelial growth of R. solani, with 294 x 10 to the eighth power cfu/ml causing the highest inhibition. Screenhouse test showed treatment of flourescent Pseudomonas during transplanting gave the lowest percent wilting of tomato plants of 20 and 40 percent, with correponding 77.3 and 57.4 percent control, for 294 x 10 to the eighth power and 251 x 10 to the sixth power cfu/ml, respectively. Lowest control was observed when treatment was done 14 days after transplanting. The results implied that flourescent Pseudomonas can be an effective biocontrol agent against tomato damping-off if applied in tomato plants during transplanting
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