Histopathological study of Plutella xylostella infected by three entomopathogenic fungal species

Jinming Xia, Zheng Huang, Qiongbo Hu
2013 Advances in Entomology  
The diamond back moth, Plutella xylostella (L.), is a major pest of the cruciferous vegetables around the world. Mycoinsecticide is a choice to alternate the high toxic chemical insecticides to control this pest. However, the application of mycoinsecticides was limited for their slower and instable control effects. In order to comprehend the different infection rates of different fungal strains against insect hosts, the strains SB005 of Beauveria bassiana, SM016 of Metarhizium anisopliae and
more » ... m anisopliae and SP020 of Isaria fumosorosea, which respectively had the LT 90 s (1.0 × 10 7 sporces/mL) 4.5, 6.3 and 6.1 d, were selected to compare their histopathological feature in infecting the larvae of Plutella xylostella. The results indicated that SM016 and SP020 strains were similar in symptons and infection process. Differently, the strain SB005 had more disease spots on body and could penetrate the cuticle of headcapsule. These probably are the reasons for Beauveria bassiana SB005 strain more quickly kill diamond moth.
doi:10.4236/ae.2013.12004 fatcat:ni5jggkag5dzpn2ww4tc4ak5gm