Yes, it will kill the leaves but the roots will survive over the winter (in the UK).
It depends on how far out the buds have sprouted and how much frost there is.
Hostas grow from zone 3 to zone 9. If the frost heaves the ground, it is possible that the exposed roots could freeze and the plant would die.
Hostas come up very late in spring and often miss the spring freezes. Most established plants would make it through a freeze but a newly planted one probably won't make it.
It is possible that bind weed or other plants could kill hostas. Black walnut trees also will kill hosta or other plants that try to grow near them.
Opossums prefer road kill or insects. It is more likely that it is a vole eating your hosta.
Yes, anti-freeze can kill you if you drink it.
Yes, a brain freeze could actually kill you.
the favourite is hosta for slugs and snails- putting sharp gravel at the base helps stem the march
If you freeze a live frog, it will kill the frog. You can; however, freeze a dead frog.
If you consume it.
There was a roumer that a plant called "the saloon plant" that was reportedly watered with beer (it was grown indoors so it didn't have any light) and it never seemed to die. But I wouldn't try that with other plants.
Yes, plants can kill plants in one day.
what type of herbicide?
There is certain types of grass that kill plants, but normal yard grass will not, it also depends on the plants. But usually its the weeds that kill the plants, not the grass.
You kill him with kryptonite- many have tried it and all have failed.