Hey _Trexis_, welcome to the forum!
Filtering out certain plants in AutoFarm isn't currently possible, unfortunately, but I'll keep the suggestion in mind for future Wurst updates.
As 72x has suggested, you should be able to use one of Wurst's Nuker hacks as a workaround for now, at least for some types of plants. By the way, I'd also recommend you to update to Wurst 7.46, which makes the Nukers much more customizable and fixes some known issues with how they worked in v7.45.1.