Strain of the fungus Metarhizium anisopliae for controlling subterranean termites

摘要

Alates of the Formosan subterranean termite (FST), Coptotermes formosanus Shiraki, collected after swarming in 2002 died within 48 hrs, and the cadavers were visibly infected with a fungus. Fungi were picked from the cadavers, transferred to media and ultimately isolated to purity. A single fungal isolate, C4-B, taxonomically identified as Metarhizium anisopliae (Metschnikoff), was found to cause rapid mortality of FST alates. This is the first report of a biological control agent for termite alates. Strain C4-B was more lethal to both alates and workers when compared to M. anisopliae strain ESC1, marketed as the termite biocontrol agent BioBlast®. 100% of FST alates exposed to C4-B spores (10⁶ spores/μl) were killed in 3 days. Field studies where C4-B spores were dispersed on grassy lawns resulted in 100% mortality of alates by day 5.