Slightly off topic but this is my area of work. Creepy shouldn’t have been able to buy “heavy duty” weed killer online, it is widely available but you are meant to have PA1&PA6 certificate to be able to purchase the strong stuff.
he has more than likely bought a glyphosate product & the stuff you can buy in Tesco, B&Q, etc etc etc are all weak versions. For example it’ll have something like 12grams of the active ingredient of Glyphosate unlike the professional strength of 360grams. If he has bought the cheap stuff, it won’t have a wetting agent in it (this is what is being linked to causing cancer too btw) so if it rains within 6 hours of application…. He’s wasted his time as it’ll wash away. Monsanto Round Up can be sprayed on & if it rains after an hour you are all good.
Plus, if he’s used a weed killer then it’s a herbicide, not a pesticide. Unsure whether he called it a pesticide or greencow summarizing.
Moral is…. If it is the strong stuff then he is in the wrong, as usual, as he hasn’t done the qualifications to: handle it, disperse it & store it safely!!! It’s a chemical & should be stored in a chem store!!
Sorry for the essay guys