I have a serious aphid problem on 13 very large poplar trees (muti-stemed) all well over 70′. They line one side of our driveway. The honey due is so bad we cannot park beneath the trees. I am not a fan of Poplars but my wife insists they stay. I have been told that a systemic treatment is the effective way to treat these trees due to their size. I have been using a product put out by Bayer which has Irramecium (sp) in it. It is expensive to use due to the size of the trees. Its application rate is measured in the 1/4″ and these trees, with the muti-stems are up to 13′ in diameter. I have treated the two trees that create the most problems for us but the no visible improvement has been made yet. I understand that in trees this large it may take months for the treatment to work its way throughout the tree.
I do have a very large thermal fogger and am wondering if your Bifenthrin can be run through it. I am hoping this may give us some relief until the treatment treatment works. Also if you know any more cost effective way to treat these trees it would be most appreciated. thanks
There is no doubt the BIFEN fogged up the tree could offer some fast results on the APHIDS which are active. And a good Hot Fogger (thermal fogger) should be plenty powerful enough to do the trick. Thermal foggers typically require the use of DEOBASE as the carrier for the chemical which enables the particles to be fogged small enough to float nice and high.
Additionally, you might consider the new systemic for aphids called SAFARI. It works better than anything else we know about; it can reach higher then other products and it lasts longer. If you combine the Safari and the Bifen throughout the year, you should be able to stay on top of this aphid infestation.