EFFICIENCY OF PAECILOMYCES LILACINUS AS BIOCONTROL AGENT OF CUCUMBER DAMPING OFF DISEASE CAUSED BY PYTHIUM APHANIDERMATUM .

Q. Waheed, A.

doi:10.33899/magrj.2010.34367

	EFFICIENCY OF PAECILOMYCES LILACINUS AS BIOCONTROL AGENT OF CUCUMBER DAMPING OFF DISEASE CAUSED BY PYTHIUM APHANIDERMATUM .
Mesopotamia Journal of Agriculture
Article 10, Volume 38, Issue 0, 2010, Pages 55-60 PDF (0 K)
DOI: 10.33899/magrj.2010.34367
Author
A. Q. Waheed
Abstract
The results of the inhibition activity of culture filtrate of six isolates of Paecilomyces lilacinus grown on potato extracts sucrose broth (PSB) and soybean extract sucrose broth(SSB)against Pythium aphanidermatum , showed that the isolates PL3 and PL4 were the superior in reducing radial growth rate of P. aphanidermatum which recorded 1.83 , 2.16 cm and 0.93 , 0.93 cm for the culture filtrate of PSB and SSB respectively , Greenhouse result revealed that isolates PL3 and PL4 were the best in increasing the most growth parameters ( shoot and root length, no. of leaves and flowers / plant , dry and soft weight of shoot and root/plant) which recorded (30.33 , 27.0) cm ,(13.0 , 12.0) cm , (6.33 , 5.33) leaf/plant, (1.66 ,1.66 ) flower / plant, (1.40 ,1.43) gm/plant, (0.61, 0.63) gm/plant respectively, while the pathogen treatment recorded ( 3.66 , 2.33 ) cm , 1.33 leaf / plant, 0.0 flower/ plant, (0.55, 0.12) gm / plant . Also, greenhouse result showed that isolate PL3 was the more efficient in reducing the disease incidence to 6.66 %. Field experiment showed that isolates PL3 and PL4 significantly reduced disease incidence to 18.66 and 21.66 %. isolate PL3 significantly superior than the fungicide Ridomil in reducing cucumber disease incidence 23.16 % .

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