Pathogen Identification of Gerbera Powdery Mildew and Its Control Experiment with Verticillium lecanii

ACTA HORTICULTURAE SINICA ›› 2010, Vol. 37 ›› Issue (11): 1803-1810.

• Ornamental Plants • Previous Articles Next Articles

Pathogen Identification of Gerbera Powdery Mildew and Its Control Experiment with Verticillium lecanii

LIU Fang，GAO Yuan，ZHANG Jing-yi，and LIU Hong-xia*

（College of Forestry，Beijing Forestry University，Beijing 100083，China）

Received:2010-05-07 Revised:2010-11-01 Online:2010-11-25 Published:2010-11-25
Contact: LIU Hong-xia

Abstract

Abstract: The pathogen of powdery mildew on gerbera is not clearly understood in China. Pathogenic testing，morphological and DNA sequence analyses identified pathogen of powdery mildew in Shandong province as Sphaerotheca fusca. Biological characteristics testing of S. fusca conidiophores indicated the optimal germination temperature was 25 ℃，the propriety of pH for germination was 6.0，and high humidity was needed for conidiophores germination. The curative effect of Verticillium lecanii on gerbera infected with powdery mildew and prohibitive effect on conidiophores germination was determined. The results showed that conidiophores concentration 2.6–3.3 g • L-1 of Verticillium lecanii could prohibit conidiophores germination and control gerbera powdery mildew disease effectively.

Key words: gerbera, powdery mildew, pathogen identification, Verticillium lecanii, biological control

CLC Number:

S 682.1+1

LIU Fang;GAO Yuan;ZHANG Jing-yi;and LIU Hong-xia. Pathogen Identification of Gerbera Powdery Mildew and Its Control Experiment with Verticillium lecanii[J]. ACTA HORTICULTURAE SINICA, 2010, 37(11): 1803-1810.

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Pathogen Identification of Gerbera Powdery Mildew and Its Control Experiment with Verticillium lecanii

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