Sorry about that - doing this on my tiny phone.

Anyway, just over a week ago, I was at this property and the Ivy vines I'm growing up the chain link looked great - very healthy, growing, green.

Today I arrived to find most of the leaves missin! At least half. Those on the ground & in the air.

Anybody know what may be happening & what I might do to revive them?

Is there a certain I y-eating pest that may have moved in?

Never grown ivy myself, but lots of things are turning brown around here. If the plants are established, I generally just let them go dormant ( unless trees, those take too long to grow; don't want to risk losing them.) But, if it was just planted in the last two years, probably isn't going to make it, if it doesn't have some assistance. I found some nifty devices on Amazon, maybe called watering spikes? that screw onto a soda bottle (filled with water, of course.) you poke a teeny hole in the bottom of the bottle, stick the spike in the soil near the plant. The teeny hole allows for a slow drip. If the soil is very dry, like it is right now around here, the moisture will wick out more quickly, but you should still get a couple of days of a slow drip.