Kudzu's threat has been long overstated. It thrives especially near forest edgelands which are always visible on highways, so concern of prevalence was partially based on individual sampling error. In reality, its presence in southern forests is higher than desired but still not disastrous (~0.1% of southern forestland), which is a fraction of worse invasives: Japanese honeysuckle (4.4%) and Asian privet (1.4%).
> ~0.1% of southern forestland), which is a fraction of worse invasives: Japanese honeysuckle (4.4%) and Asian privet (1.4%).
Sample size of 1 here (I know), but I've spent a meaningful portion of my life outdoors in the south and I have _never_ seen swaths of the landscape covered with Japanese Honeysuckle or Asian Privet like I have Kudzu. It absolutely dominates _everything_ in areas where it's present here (not surprising when it can grow up to a 1 foot (0.3 m) a day.)
Not trying to say you're incorrect, just trying to get a better handle on this. The thought that there are more destructive invasive plants in the US south than Kudzu is kind of blowing my mind.
You won't see swaths of honeysuckle or privet because it grows in the understory throughout the entire forest, choking out natives. Part of their destructive power is that they bloom earlier than most natives in spring, essentially stealing the available sunlight in those golden weeks before the overstory leafs out and reduces sunlight in the understory.
I guarantee you that if you've spent a meaningful portion of your life outdoors in the south you have seen Japanese Honeysuckle at the least, it is everywhere. But it's not a dramatic/easily identifiable shower like kudzu.
The data I'm citing is from my textbook for my Ohio Citizen Volunteer Naturalist program I did in the Fall semester, it cites the US Forest report but doesn't give a link. I think it's from this report [PDF warning]: https://www.srs.fs.usda.gov/pubs/gtr/gtr_srs178/gtr_srs178_3...
I would say that it's more accurate to say that kudzu is not poisonous. I definitely would not say it tastes good. It's got that "green plant" taste that you get from just chomping on any ol' leaf you might find. I mean, if you're poor and starving you could maaaaaybe survive on Kudzu, but it will be rough, it's not very calorie dense, even for a leafy green. Goats won't even eat it unless there is literally nothing else to eat. This whole, "oh you, can eat kudzu!" thing is just crunchy-mom Instagram influencer bullshit.