I have sixteen 30 yr old pine trees across the front of our property. Three years ago, in April, I noticed they were looking bad. I investigated and realized they were infested with pine tip moths in the larvae stage. A friend of mine that works for a tree surgeon said to use Adonis 2F. I thought the trees were going to die, but after a serious treatment with Adonis 2F they survived. At my friends suggestion, I am treating them yearly.