Hello,

This doesn't look like the typical mottling or spotting symptoms seen in "HVX". Some hosta leaves were damaged this spring by the frost of May 8-9. 

There are several fungal diseases and other viruses that cause leaf spots on hosta. 

MSU Plant and Pest lab can test for Hosta virus X and diagnose other types of leaf spots. The only way to positively ID HVX is through a test. If you have other hostas, it may be worth testing so as to know for sure.

Here are links to articles on this virus and other diseases of hosta-

https://store.extension.iastate.edu/Product/Hosta-Diseases-and-Pests-Sustainable-Urban-Landscapes-PD...

https://pestid.msu.edu/plant-diseases/hosta-virus-x-hvx/

Remember to disinfect your tools, pots, etc. and your hands and gloves, used around suspected hosta, as transmission to other hosta is through the sap. See details here--- 

http://www.americanhostasociety.org/Education/HVX_Brochure_Revised_Dec_2013.pdf

The instructions and forms are on the  MSU lab website; testing for "HVX" is $20.00 To submit a sample to MSU Plant lab---

Www.pestid.msu.edu

Follow the instructions for samples and packaging carefully. You may phone the lab if you have questions on the procedure, or write back to us here.

Thank you for the information!  Could it be that they are getting too much sun?  

Yes, or being spotted by slugs in the evenng, chewed by rabbits, many things can damage leaf tips. You could either move them or, as an experiment, shade them temporarily with cheesecloth supported on stakes or draped over a 'push in' type garden fence' to see how new growth comes out. Keep them watered either way. Hostas are drought tolerant once they are well established- about the second full season in the ground. You can clip off "bad" leaves. But, remember to,clean hands and tools before working on ohter hostas, just in case this turns out to be a virus.