Monarch larvae can ingest the OE parasite by eating infected milkweed plants, crippling them as adults. Do not plant tropical milkweed. Plant Asclepias tuberosa, or butterfly weed, and asclepias syriaca and s. incarnate, swamp and common milkweeds, which are native to the U.S.
If you are interested in #Monarch #Butterflies you know that the Milkweed is essential to their existence. This article "Twelve Native Milkweeds for Monarchs" will be very educational. Read it here https://getpocket.com/a/read/856349399.