Yes, boiling water will kill a plant.
Boiling water does kill spores. This is because spores are like tiny plants in storage so the boiling water harms them.
no
In St. Augustine grass it is most important to apply a crabgrass preventer and fertilizer in early Spring. Far easier to prevent than to kill later as almost anything that kills crabgrass can kill St. Augustine grass. Our Ace Hardware sells a crabgrass preventer in the Spring. They now have a product called Garden Weasel Crabgrass killer. A container of this powder will do up to 200 sq. ft. Must be applied to wet leaves on the crabgrass. I found I did a second application on some "tough guys" but it worked fine.
Sorry- that is not going to work. You wet the grass with water with a few drops of dish detergent in it, then put DRY sodium bicarb in an old sock or pair of pantyhose, and dust the crabgrass plant with the baking soda. Limited effectiveness.
Instant death.
yes it does
It worked for me.
Yes
no it cannot kill trees
boiling water will kill a plant it touches.
Yes, it is cruel. They are dropped into boiling water.