We have a few of those thistles. Waist-high isn't unusual but I don't recall one as big as your machete photo. Jimson Weed (Datura) is what I'm trying to eradicate here. If I see one before the seeds pop, I pull it out by hand. After several years pulling them, they are finally rare. (The apples sell for much more as organic so we no longer spray the ground for weeds, just disc). The only spray allowed is lime-sulphur sprayed into the trees against Coddling Moth. (
Photo - bin on my watering rig to take in the Jimson Weed).
My watering rig for new orchard trees is similar to your spray rig, 300 gallons in a tote. But using a smaller 4x4 tractor to pull it. (
Photo)
Is your GPS to spray in neat parallel rows?
A few years ago I got on a campaign to dig out the oak and blackberry volunteers that are so close to the apple tree trunks that discing can't reach them. Spraying in the past, and now pruning them down flush, wasn't killing them. But the backhoe pops them right out of the ground!
More 'brute force gardening': There are rows of old trees down in back that were impossible to harvest after they were abandoned to the blackberry jungle that had swallowed them. Note the grotesque shape of limbs that hadn't seen full daylight for decades. The backhoe did a good job yanking the blackberry runners out of the trees and stunting the blackberry growth on the ground. I still need to leave some ground cover down there to resist erosion.
The blackberries in the terrace rows are rooted so deep that there is little I can do on the surface to kill them completely.
I didn't realize the thistle you pictured is one that the Monarch butterflies need. I saw the first Monarch last weekend. Alone, and it seemed a little smaller than I remember but the coloring was right. What I haven't seen for a while is any frogs and grass snakes. Both used to be common, years ago.