Rampant pear leaf blister mite
I have pear leaf blister mite on all 3 pear trees, and it has got so bad that it has got into the bark. I have tried Pyrethrum based products, but they do not penetrate the hiding places for the bugs, and I will be trying Pyrethrum 5EC again this year, along with cutting off infected branches & leaves. I have found other available products, but they kill bees (Bayer Envidor etc.). Certis Dimilin Flo works well from what I have heard, but 'Pro use only', is this the case, or is it available retail?