The previous owner of my property neglected it for about 10 years and it's now inundated with English ivy. It's already killed numerous trees and I've been using a bobcat to remove it. Unfortunately there are certain areas where I need to spray it ... Can someone recommend a brush killer or anything that works well on Ivy? Also, is now the time to start spraying? I live in LI, NY (Zone 7). Any suggestions are appreciated. Thank you.