Pesticide Products Search for products by PC codes, product names, firm numbers or names, or registration numbers. This query yields information on pesticide products that meet all of the criteria you enter below. You may select multiple PC codes (lookup), numbers or names by separating them with a comma. Search by PC codes: Search by product names: Search by firm numbers or company names: Search by (partial) registration numbers: Active Products Only All Products About NPIRS' USEPA/OPP Database Queries About NPIRS' Databases For content questions contact: NPIRS User Services Phone: (765) 494-6561 1435 Win Hentschel Blvd, Suite 207 West Lafayette, IN 47906-4154 E-mail: npirs@ceris.purdue.edu Wheat seeds treated with bacteria like those colonized in this petri dish are nearly immune to wheat take-all, a root-destroying fungal disease. The sequencing gel in the background bears the genetic code for bacterial enzymes that synthesize natural antibiotics.