It is important to sterilize (clean) the containers. Get your mom or dad to help you. I clean containers after each brood. Raise a caterpillar, clean the container with bleach or some other disinfectant. I put papertowel down to catch frass (butterfly poop) and make sure you keep that cleaned out too. Too much frass (butterfly poop) can make your caterpillars get sick.http://www.evansonart.com/monarchdisease.html
Great photos and info on diseases.http://www.mymonarchguide.com/2007/07/d ... spore.htmlhttp://www.learnaboutmonarchs.com/learn ... spore.htmlhttp://www.uga.edu/monarchparasites/whatisOE/index.html
How to tell if butterflies are infected with OE
"An infected pupa may develop dark spots or blotches two or three days before the butterfly emerges. These abnormal dark areas are parasite spores. Spores form on the eyes, antennae, wing veins, but mostly on the abdomen. You can see the spores through the outside layer of the pupa a day or two before pigments that color the butterfly normally darken the pupa. Before a butterfly emerges from the chrysalis, pigments are laid down coloring the scales that cover the butterfly. This normal change in the color of the pupa is symmetrical. The color change of an infected monarch happens earlier and does not create a balanced pattern on the pupa."