Saucer Magnolia Summer Leaf Drop

Question

HI, I’ve got a mature Saucer Magnolia out in my front yard. It seems to have been infected with aphids and some powdery mildew. A tree expert recommended leaving it alone, while a chemical company wanted to spray bifenthrin. Meanwhile, I’ve been releasing Ladybugs hoping that’ll do something. Leaf Drop is present, please see pics below of the fallen leaves. Thanks! Sam

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Answer 1

I would, certainly, recommend treating the aphids. It will be your choice as to how to do that, but chemical means are quite a bit more effective.

Here are some articles that will help:

https://www.gardeningknowhow.com/plant-problems/pests/insects/plants-that-repel-aphids.htm

https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm