Environmental contamination withMetarhizium anisopliaefrom fungal bands for control of the Asian longhorned beetle,Anoplophora glabripennis(Coleoptera: Cerambycidae)
- 1 January 2008
- journal article
- research article
- Published by Informa UK Limited in Biocontrol Science and Technology
- Vol. 18 (2), 109-120
- https://doi.org/10.1080/09583150701774860
Abstract
Our objective was to determine whether conidia from non-woven fiber bands impregnated with Metarhizium anisopliae F 52 could be spread to other parts of the environment, and whether Anoplophora glabripennis could become infected with conidia dispersed from fungal bands. In the field, bands containing M. anisopliae were hung at 3 m height on 15 trees. Bark samples were taken 10, 20, and 30 cm above the bands and 10, 30, and 60 cm below the bands 2, 5, and 9 days after band placement to quantify conidial densities. There were more conidia in samples taken below bands compared with samples taken above bands. A significant positive correlation was found between rainfall and the occurrence of conidia on any of the bark samples. A laboratory study was conducted to determine whether conidia from M. anisopliae fungal bands could be spread to other parts of the environment by A. glabripennis adults and whether A. glabripennis could become infected by conidia dispersed from fungal bands. One or five adult A. glabripennis were used to contaminate artificial environments with conidia. All adults subsequently exposed to contaminated environments were killed by fungal infection. Beetles exposed to environments that had been contaminated by five beetles died in fewer days compared with environments contaminated by one beetle. Beetles in both density treatments died in fewer days than beetles exposed to environments without M. anisopliae conidia. Our results indicate that environmental contamination with conidia from fungal bands can occur, and that adult A. glabripennis can acquire infection from a contaminated environment.Keywords
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