Macro lens recommendation

[Fotografer]

Hello all,</p>
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<p>This is my first post with this community and I am sure it won't be my last. I am attempting to locate a decent macro lens for my wife to utilize with her newly acquired Canon EOS 50d DSLR Camera. Right now, it has the lens listed in my profile, the EF-S 18-200mm f/3.5-5.6 IS Standard Zoom Lens, and she is looking for a good lens to use for up-close nature photography similar to <a href="http://www.thephotoforum.com/forum/nature-wildlife/149261-macro-testing-my-new-lens.html" target="_blank">the photos in this thread</a>. </p>
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<p>Does anyone have a good recommendation for a Macro lens she can utilize for this purpose which will provide decent photos? She loves taking pictures of wildlife (insects) and flowers and as such, a good blurring capability for the background is preferrable. Anyways, Let me know if anything else is needed as far as other requirements or information. </p>
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<p>Thanks!</p>
<p>&n