关键词: 丝光绿蝇, 双翅目虫疠霉, 虫霉目, 昆虫病原真菌, 广东省

Abstract:

Objective To describe the symptoms of Lucilia sericata infected with Pandora dipterigena and the morphology of P. dipterigena, providing the basis for blowfly control. Methods The morphology of P. dipterigena was observed using aceto-orcein and cotton blue staining. The diameter of conidia, nuclei and conidiophores were measured and photographed. Results The typical adults of L. sericata infected with P. dipterigena usually attached to the stems of Ficus virens, wings spread laterally, with a dense and gray conidiophore layer covering the whole body. Around the body was intensively protruding pseudocystidia of different lengths. The primary conidia was bitunicate with a single nucleus, varying in form from elongated ellipse to subfusiform, (24.8±1.8)μm×(10.8±0.9)μm [(22.1-28.6 μm)×(9.1-14.3 μm)] in diameter with L/D of 2.3±0.2(1.89-2.86). The secondary conidia was similar to the primaries in the appearance, (17.3±1.4)μm×(11.5±1.0)μm [(15.6-19.5 μm)×(9.1-13.0 μm)], L/D=1.5±0.1(1.3-1.7). The pseudocystidia was abundant and monomitic, with a basal diameter of (19.7±1.3)μm (16.2-22.9 μm) and (5.4±1.2)μm (4.0-6.1 μm) to the ends. The rhizoids were monomitic with the diameter of (19.5±0.9)μm (16.6-21.4 μm), with a disc-like holdfast. No resting spores were observed. Conclusion The fungus P. dipterigena may be used in the control of L. sericata.

Key words: Lucilia sericata, Pandora dipterigena, Entomophthorales, Entomopathogenic fungi, Guangdong province