I found many insect eggs in a white tunnel like line on the back of my holly leaves. What can this be? How do I get rid of it or them?
White Insect Egg Tunnels on Back of Holly Leaves
Certified GKH Gardening Expert
It sounds like you may have pests, perhaps scale or mealybugs. I would recommend neem oil. I have found it to be very effective against these pests. Here is more information on it:
For additional information on scale bugs, which commonly affect these plants, here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm