The Brown Wasps Essay

The Brown Wasps Essay-21
Like many invasive species, the brown marmorated stinkbug has no major enemies in its new home to keep its population in check.

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Three groups then vet the evidence of its safety: a scientific review panel with representatives from Canada and Mexico, an APHIS official, and sometimes the U. Entomologist Paul De Bach of the University of California, Riverside, in a 1971 essay, called this phenomenon fortuitous biological control. Recently, the North American leaf beetle (, which kills the gypsy moth in its caterpillar stage—started to spread around New England in the late 1980s, “it was very exciting,” says entomologist Ann Hajek of Cornell University.

Honey bee colonies can have populations over 75,000, while wasps' colonies tend to have fewer than 10,000 individuals.

Queen wasps build a nest for their colony, while worker honey bees create and maintain hives.

Talamas, an expert on species, had recognized that some were samurai wasps. He had spent years studying the wasp in the lab to make sure that, if released, it would do its job without harming native species. Genetic tests confirmed that the wasps in Maryland hadn’t escaped from any of his quarantined strains. Over the decades, a variety of uninvited biocontrol candidates have popped up on new continents, including a fungus that kills forest-stripping gypsy moths and a beetle that devours allergy-inducing ragweed. “We’ve had this mindset that natural enemies would be less likely to establish” than invasive pests, he says.

“The examples definitely are piling up,” says Donald Weber, an ARS entomologist in College Park, Maryland, whose team found the first U. But sometimes, “It might be fairly easy.” Those unexpected arrivals can unsettle scientists and regulators.


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