Save Your Trees From Aphids This Year
They don’t look like an insect, but they are – those sticky lumps you often find on the leaves or stems, sometimes dripping goo onto your car below, those are Aphids (see info box below) which can harm your trees.
The good news is that they, along with Bark Beetle, Oakworm, Scale and Fungus, can all be treated when detected early.
Oak Trees (from SF Gate): If the edges of your oak tree’s new spring leaves are curling over their upper surfaces, suspect Stegophylla essigi aphids folding the leaves into protective coverings. Lifting the edges reveals a buildup of white, cottony wax. Stegophylla querci aphids, on the other hand, feed openly in small colonies on both leaf surfaces while Stegophylla quercifolia aphids stick to the leaves’ undersides. Both of them also cover their feeding sites with unsightly wax secretions. Making matters worse, they produce a syrupy waste called honeydew. This goo drenches the leaves, branches and surrounding objects and lures wind-transported sooty mold spores to the trees, disfiguring them even more.
For best results, treatments should be scheduled with SOS Pest Control before March.