Thursday, January 15, 2015

Tropical milkweed is weakening monarch butterfly populations.

A monarch caterpillar feeds on tropical milkweed, Asclepias curassavica.

As well-meaning gardeners have heeded the call and planted lots of milkweed plants to help the monarchs, it turns out that the species of milkweed we have been planting the most has been leading to the proliferation of a parasite that is infecting and weakening these beloved insect ambassadors, and further reducing their populations.

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