ELI5: Explain Like I'm 5

Honeydew source

Honeydew is a sticky sugary liquid that's produced by tiny little insects called aphids. These insects have needle-like mouths that they use to poke into plants and drink their sap. The sap is like the plant's blood, and it's full of nutrients that the aphids need to survive. But not all of the sap gets absorbed by the aphids, so some of it comes out of their backsides in the form of honeydew.

Honeydew can be really attractive to other insects like ants and wasps, who will come along and eat it up. Sometimes even fungi and bacteria will grow on honeydew too, because it's such a rich source of nutrients. But honeydew isn't just important for these other organisms - it can also have a big impact on the plants themselves.

See, when the aphids suck sap out of a plant, they can cause it to become weakened and stressed. But the honeydew they leave behind can actually make things worse! As more and more honeydew builds up on a plant, it can start to block up its pores and prevent it from getting the air and sunlight it needs.

So while honeydew might seem like a tasty treat for some insects, it can actually cause a lot of problems for plants if it's not managed properly.