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Bless the bats of agriculture

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  • Bat appetites for insect destruction translate to about $3.7 billion worth of pest control in North America each year, and that estimate is probably on the low end.

Little bats play a giant role in agriculture.

They account for approximately a quarter of all mammals — a massive army that operates as the scourge of the insect world. Their appetite for insect destruction translates to about $3.7 billion worth of pest control in North America each year, and that estimate is probably on the low end.

Moths, beetles, stink bugs, leafhoppers and the rest — bats consume the crop-eaters without much discrimination. (Bats also pollinate over 300 types of fruit across the globe.)

From a 2011 report in Science: “Estimating the economic importance of bats in agricultural systems is challenging, but published estimates of the value of pest suppression services provided by bats ranges from about $12 to $173/acre (with a most likely scenario of $74/acre) in a cotton-dominated agricultural landscape in south-central Texas.”

The authors of the Science study (Economic Importance of Bats in Agriculture) extrapolated the Texas figures across the United States and estimated the value of bats to agriculture to be “as low as $3.7 billion/year and as high as $53 billion/year. These estimates include the reduced costs of pesticide applications that are not needed to suppress the insects consumed by bats.” The dollar value estimate doesn’t include environmental or timber industry savings.

Despite their natural pest control service, disease has taken a toll on the U.S. bat population over the last few years. White-nose syndrome was first detected in 2006 and has spread quickly across the U.S. and Canada — 22 states and five provinces. From HuffPo: “White-nose syndrome can wipe out 90 percent of bats in a cave. It continues to spread and infect bat caves across the U.S. Scientists are still on the hunt for the source of the powdery white fungus that often coats the muzzles of its victims.”

 

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White-nose syndrome has already killed millions of bats in the Northeast (the 2006 initial detection occurred in New York) and that equates to millions of metric tons of insects not consumed by bats. And it’s a reasonable assumption that the agricultural value of bats is vastly greater in other parts of the U.S when compared to the Northeast.

With 1,200 species worldwide, the value of bats to global agriculture is beyond value. From Justin Boyles, lead author of the Science report: “Bats eat tremendous quantities of flying pest insects, so the loss of bats is likely to have long-term effects on agricultural and ecological systems. Consequently, not only is the conservation of bats important for the well-being of ecosystems, but it is also in the best interest of national and international economies.”

 

Follow me on Twitter: @CBennett71

 

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Discuss this Blog Entry 1

Bat Removal (not verified)
on Jan 14, 2014

Great article, I work in humane bat removal in Columbus, Ohio and we often stress the importance of bats and the benefits to the agricultural community is one of them. Most are often unaware of the benefits provided by bats and that some actually live right in our attics! If anyone would like a lot more information feel free to visit my webpage http://www.propestmen.com/ohio/critters/bats/bat_removal_bat_control.html or http://www.propestmen.com/ohio/index.html for more general information. Thanks again for the great article!

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