I need an example of kind of insects used as biocontrol agents and find this a...

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Biology

I need an example of kind of insects used as biocontrol agentsand find this a successful biocontrol story and why?

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There are two examples you can choose any of them Control of Klamath Weed infestations on California rangeland Hypericum perforatum Linnaeus known also as Klamath Weed or St Johns wort has a long history of use as an ornamental and medicinal herb Native to Europe Africa and the Middle East this aggressive weed arrived in North America with early settlers who valued its mythical and curative powers Mitich 1994 Unfortunately H perforatum also induces photosensitivity in livestock that feed upon it leading to skin damage and related ills Holloway and Huffaker 1949 Wild populations of H perforatum on California rangeland were first noted near the Klamath River around 1900 By the early to mid 1940s Klamath Weed had spread to over 400000 acres of California grazing land sickening cattle and sheep and threatening the livelihood of the states ranchers Holloway and Huffaker 1949 Controlling the weed with chemical herbicides over such a large area was considered too costly and impractical DeBach and Rosen 1991 described the biological control efforts against Klamath weed in California In 1944 Professor HS Smith of Californias Biological Control Division See Answer

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