I have lost four monarchs (three in the pre-pupal "J" and one just into the chrysalis stage) this year. This is twice the number in all the many years I have been raising these amazing critters. The three in "J' formation have released a clear to green-ish fluid and do not go into the chrysalis. I have not waited long enough to determine if it dies...
I also have another two chrysalis' that have oozed a drop or two of a clear green-ish liquid within hours of them going into the chrysalis. The seem fine otherwise.
I have quarantined the growth chamber....only one caterpillar eating left but several chrysalis' remain.
I have researched several web-sites and OE seems to become apparent after the Monarch is in the chrysalis and later in this life stage. My nasty bug (pathogen) appears during the metamorphosis or immediately after.
What could I be dealing with? What should I do--> destroy the 15-20 Monarchs remaining in the cage? Let them go through with their life cycle? Release any adults that successfully emerge? Not having experienced this before I am at a loss...almost feel like I am losing something close. aagh!
You may ask yourself, well, how did I get here?