&lt;img src=&#039;http://assets.bizjournals.com/stlouis/blog/biker2*100.jpg?v=1&#039;&gt;Monday&rsquo;s episode of &ldquo;American Chopper: Senior vs. Junior,&rdquo; a Discovery Channel series about a father and son competing to build the best motorcycles, will have an unlikely guest.

Creve Coeur-based agricultural giant Monsanto Co.

Well, at least Monsanto&rsquo;s Dekalb corn brand.

On the show, Paul Teutul Sr. and Paul Teutul Jr. design and build elaborate bikes. The show will feature a Dekalb 100th Anniversary Bike over two episodes airing Monday and Nov. 7.

Construction of the custom-designed, one-of-a-kind chopper started in July...&lt;div class=&quot;feedflare&quot;&gt;
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