Corn ear worms

The last 3 years every ear of corn has had at least 1 ear worm. Those just in the tip I can deal with, but now they are eating down the whole length of the cob. How can I prevent them? Thanks for any & all help, Steve

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.