, Volume 57, Issue 6, pp 827–836 | Cite as

In vitro and in vivo evaluation of microbial-enriched compost tea on the development of powdery mildew on melon

  • Yuvarani NaiduEmail author
  • Sariah Meon
  • Yasmeen Siddiqui


This study evaluated the effects of microbial-enriched compost tea (CT) on the conidial germination of Golovinomyces cichoracearum DC. and development of powdery mildew on melons in a time-dependent manner. In vitro conidial germination was significantly reduced by 94 % and 85 % upon treatment with Daconil® (fungicide) or microbial-enriched CT, respectively, 96 h after incubation (hai). Morphological analysis under light microscopy demonstrated that conidia co-incubated with microbial-enriched CT at 48 hai appeared ruptured, which contributed to higher inhibition of conidial germination, increased cell permeability and leakage of cellular contents. These observations may be explained by antibiosis. Moreover, different application time of microbial-enriched CT on melons significantly affected disease development. There was a delay in disease development by 12 days in plants treated with Daconil®, microbial-enriched CT applied 24 h after inoculation and microbial-enriched CT applied simultaneously with inoculation when compared to the control treatment. Curative application of microbial-enriched CT (24 h after inoculation) delayed the onset of disease, and the efficiency of inhibition was comparable to a fungicidal spray (Daconil®). Hence, microbial-enriched CT may be used to inhibit the development of powdery mildew on melons, thus reducing the dependency on chemical fertilisers.


Compost tea Conidial germination Golovinomyces cichoracearum DC. Curative application Biological control 



The authors wished to thank the Ministry of Science, Technology and Innovation (MOSTI) for the research grant received with Project No : 05-01-04- SF0181 under which this work was initiated.


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Copyright information

© International Organization for Biological Control (IOBC) 2012

Authors and Affiliations

  • Yuvarani Naidu
    • 1
    • 2
    Email author
  • Sariah Meon
    • 1
  • Yasmeen Siddiqui
    • 1
  1. 1.Laboratory of Food Crops and Floriculture, Institute of Tropical AgricultureUniversiti Putra MalaysiaSerdangMalaysia
  2. 2.Malaysian Palm Oil BoardKajangMalaysia

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