How to pronounce “herbicidal” in English

so if you patented a specific herbicide, your competitors could still use hundreds of its close relatives, which would still work perfectly well without violating your patent rights.But glyphosate was different, if you were to modify the molecule in any way, its herbicidal properties were completely gone, so Monsanto could rest easy knowing that until the year 2000,they would be the only ones able to sell it.