I HAVE ABOUT 6 DWARF ALBERTA PRUCE TREES ABOUT 3 TO 4 FEET TALL. THE BOTTOM OF THOSE TREES ARE TURNING BROWN.
I WAS TOLD TO PLACE A PIECE OF WHITE PAPER UNDER THE TREE
AND SHAKE THE TREE. AFTERWARD I FOUND A BUNCH OF VERY SMALL BLACK INSECTS CRAWLING ON THE PAPER.
HOW DO I GET RID OF THOSE INSECTS PERMANENTLY?
