Are there concerns about rearing in mesh tents that are kept outside?

Rearing monarchs outside has been found to be the best way to rear. This method will have the least effect on their migratory ability, as they are still exposed to sunlight and natural conditions.

However, even large mesh rearing tents can pose potential risks for monarchs. The tents could facilitate the spread of disease among the monarchs by keeping them closer together than they would naturally be able to distribute themselves. The tents may also keep out insects that are beneficial, and trap whatever is in that area inside the enclosure (including parasitoids, insect predators, etc).