Wasps, flies and hover flies on plum tree

We are having a problem with wasps, flies and hover flies on our plum tree. They don’t appear to be attacking the tree but there are thousands of them. The tree looks like it now has a film over to one side?

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1 Comment To "Wasps, flies and hover flies on plum tree"

#1 Comment By GKH_Susan On 07/29/2020 @ 1:41 pm

You haven't mentioned any other symptoms, like leaves curling, but I would bet that your tree has an infestation of plum aphids or some other small insect that wasps and flies like to feast upon. Of course, if the tree is bearing fruit, that, too, may be attracting them. It sounds like you need to treat the tree with horticultural oil. These articles should help:

https://www.gardeningknowhow.com/edible/fruits/fegen/wasps-in-fruit-trees.htm ^[1]
https://www.gardeningknowhow.com/edible/fruits/plum/control-leaf-curl-plum-aphids.htm ^[2]

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URLs in this post:

[1] https://www.gardeningknowhow.com/edible/fruits/fegen/wasps-in-fruit-trees.htm: https://www.gardeningknowhow.com/edible/fruits/fegen/wasps-in-fruit-trees.htm

[2] https://www.gardeningknowhow.com/edible/fruits/plum/control-leaf-curl-plum-aphids.htm: https://www.gardeningknowhow.com/edible/fruits/plum/control-leaf-curl-plum-aphids.htm

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