Manna From Heaven?

As I walk under a tulip tree feel on a bright sunny June day in Indiana, tiny droplets fall on my head and arms. Looking up, I notice the shiny gloss on the leaves and underneath the clusters of immature aphids around a larger colonizing female aphid. The droplets are honeydew secreted by the feeding aphids. Aphid populations large enough to make detectable honeydew rain are associated with trees that are under stress. The aphids can cause yellowing of leaves and additional water stress for the tree. It is best to give infested trees plenty of water and wait for the lady beetles to arrive and control the population.

Aphids

Aphids on tulip leaf

About jjneal

Jonathan Neal is an Associate Professor of Entomology at Purdue University and author of the textbook, Living With Insects (2010). This blog is a forum to communicate about the intersection of insects with people and policy. This is a personal blog. The opinions and materials posted here are those of the author and are in no way connected with those of my employer.
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