crazy we have 3 easements on our property, flint hills, excel energy, and the local electrical. unfortunately, they have the right to do any 'clearing' or 'spraying'. there is nothing you can do. here, spraying really is a waste of time, they just clear cut, and brush cut.
my HO............just move your hives and fence out of their easement, for less headache.
one last comment though, make sure you know, WHERE the easement is, sometimes 'they' like to creep outside the given easement.