Weed-EX™ is used to prevent the growth of weed on empty cropsticks at the cost of crop quality. Damage to the crop's quality is permanent and cannot be reversed, aside from complete removal.
Right-click on the crop that you want to spray it on while holding it. You can also place it in a crop-matron to automatically apply it to your crops. Overuse will reduce your crops quality, so apply sparingly!.
See: Crafting Guide
We thouroughly reviewed various reports of potential research being destroyed by weed and thus researched a formula called "WeedEx".
This potentially gen-mutating and highly-lethal-to-human-employees poison spray is inharmful to plants except for Weed. Spraying it onto all your crops will grant them full resistance against Weed, as well as preventing Weed to grow on empty crops.
Rumors regarding the negative effects of overusing WeedEx yet have to be evaluated, and the spreading of said rumors will be met with prompt dismissal of the offending employee.
Our mentally unstable artists asked us to pass on this "blueprint" to you for an unknown reason: