I saw these taking over a balloon plant in the area of South Bay, LA (Redondo Beach, CA). Are they beneficial insects?
1 Answer
They're milkweed bugs, mostly immature ones in various stages. They're usually found on Asclepias - I'm not sure what you mean by Balloon plant, that common name is usually taken to mean Platycodon, but quite why they're on that plant I don't know. Milkweed bugs have piercing mouthparts and feed on milkweed, more information, and images of the bugs in various stages of development, here:
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Thanks Bamboo! I didn't know it was an asclepia. ID'd as Gomphocarpus Physocarpus / Balloon Plant after doing some search. There are tons of these bugs around here. Commented Sep 12, 2017 at 7:48
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Ah, right - Gomphocarpus being a type of milkweed, Well that explains the bugs' presence then!– BambooCommented Sep 12, 2017 at 11:40