What is happening to my Hydrangea?

[iamnguyen]

My hydrangea is suspiciously wilting. I found these under the leaves. Are they eggs? Which pest are they from? What should I do about it? Thank you very much for your response.

 

[oneeye]

Can you shoot a photo of the plant in the ground?

 

[iamnguyen]

Yes, here are the photos.

 

[NigelJ]

The things in the jars look like scale insects.
The hydrangea doesn't appear to be wilting, but there is damage to the growing points and leaf edges. Could be insects, together with wind scorch.

 

[iamnguyen]

Thank you so much, friends. I'll erect some windbreaks and get insecticide for scale insects and see how it goes.