Identification of Isaria fumosorosea FZ-01 and Evaluation of Its Bio-control Potential against Bemisia tabaci

doi:10.16409/j.cnki.2095-039x.2019.06.013

Abstract

Abstract: A strain of entomopathogenic fungi (FZ-01) isolated from Bemisia tabaci was identified morphologically and using molecular method employing rDNA-ITS gene sequences. The biocontrol potential of the strain was also evaluated. The strain FZ-01 was identified as Isaria fumosorosea, growing well on the potato medium (PDA), showing wide adaptability to temperatures (above 35℃) and pH values (pH 4-10), and with fast spore germination speed (5 h) and high spore germination rate (>90%). Under laboratory conditions, the virulence test showed that the strain at conidium concentration of 1.0×10⁷cfu/mL was characterized by the medium lethal time (LT₅₀) of 2.75 d and the medium lethal concentration (LC₅₀) of 2.69×10⁴cfu/mL at 4 d after inoculation. The results indicate that the strain FZ-01 possesses promising biocontrol potential against B. tabaci.

Key words: entomopathogenic fungi, Isaria fumosorosea, Bemisia tabaci, bio-control potential

CLC Number:

Q935
S476.1

ZHENG Yu, DING Xueling, YAO Fengluan, LU Xuesong, ZUO Hui, HE Yuxian. Identification of Isaria fumosorosea FZ-01 and Evaluation of Its Bio-control Potential against Bemisia tabaci[J]. Chinese Journal Of Biological Control, 2019, 35(6): 876-883.

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