Would you care to elaborate as to what is "nasty" about mixing this stuff up?
I put on some stuff once that had something to do with 'rotten eggs' and smelled as such. It was difficult to get into a consistency and keep it that way, so it would go through the sprayer. I clogged up my $100 SOLO sprayer and need to get some replacement parts to try to get it working again. And that was without letting the solution set in the sprayer, before cleaning it out. Water didn't seem to do enough though.
Your 'nasty' experience might be helpful to know.
(After spraying, the next year I stapled small white popcorn bags on the leading red oak terminal bud a couple winters and into spring, which helped protect the bud from being nipped. I was impressed how long (through wind, snow, rain, sleet, re-drying) the paper bags lasted. Don't know if they would work for the pine leader, as they may be nipped by deer in the early growing stage. Maybe a 'rolled' sheet of white paper, or wax paper, stapled to protect the leader would help. I assume the leader is the only 'bud' or 'tip' that needs protection. 1500 trees is not bad for individual leader treatment, but 8' fencing would be pretty expensive in comparison. Once the trees are out of deer's reach they wouldn't need protection any more. Most of my red oak are out of reach now, but get browsed pretty heavy, as do the ash. I think the plantation is like a salad smorgasbord for the deer. Get into a row, and just move down the 'table'. /forums/images/graemlins/crazy.gif