The cadence and language style reminded me greatly of the Chorus at the beginning and end of Henry V. When reading this poem, I hear the man that played that part in the Kenneth Branaugh film.

Some readers might find it helpful if you noted that lacewings and ladybugs eat aphids while some species of ants herd them.

“And there a few aphidian peasants leeched their lives from phloem’s rill.

”

I don’t like the word peasants here. It doesn’t fit well with ‘bohemian blissmare’ and it conveys a sense of rustic dignity that takes the reader away from the sense you want to convey that sucking the sap is sin. Maybe ‘wastrels’ instead?

‘Leeched their lives’ is also a bit awkward. I imagine you mean something like ‘leached their living’ but it sounds like they’re draining their own lives. Perhaps you meant to convey that secondary meaning, dunno.

“though only temporarily.”

Too much filler.

“The ‘nighted nibelungian host marched one-by-one as ‘counts the song.”

Making the reader think of that song really takes him out of the poem. Its the wrong mood.

“And ‘neath the load of sponsored sin the aspen sapling’s blood was taxed.”

I like this line a lot. Would it be better if you changed it to “aspen’s sapling blood”? Less essing.

“The trees all danced ‘fore God’s great breath; from each its wrath obeisance wrest’.”

The ‘it’ is pretty unclear. It took me awhile to realize that it referred to God’s breath and not to each tree. Maybe “from each breath’s wrath obesiance wrest”?