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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera) » Plant-parasitic Hemipterans (Sternorrhyncha) » Aphidoidea » Aphids (Aphididae)
Photo#1761425
Rice root aphid?
Copyright © 2019 holodiscus

Rice root aphid?
Grants Pass, Josephine County, Oregon, USA
December 7, 2019
Found in a cannabis nursery, with many crawling along the floor. Many winged aphids detected on sticky traps. Weekly sulfur sprays to the plants, so assuming these were in the soil as only winged adults are found on the plants. No other signs of aphids on stems or foliage. Growing in airpots, plenty of fungus gnats at the moment as well. Is it Rice root aphid Rhopalosiphum rufiabdominalis?

Images of this individual: tag all
Rice root aphid? Rice root aphid? Rice root aphid?
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Contributed by holodiscus on 10 December, 2019 - 2:07pm

I think you are correct.
Rhopalosiphum was definitely my initial thought when I saw the pictures. R. rufiabdominale is one of the few aphids that have five antennal segments instead of 6, and in that picture of the alate (winged adult) I think I can count five but its tough. Aphids are tough to photograph.

If you still have the specimens and a scope you might want to try and count them. Segments I & II will be the short ones close to the head, then III & IV are longer, and IV is the one with the stubby base and long threadlike end (known as the processus terminalis)
… Natalie Hernandez, 15 January, 2020 - 11:24am login or register to post comments

 
Thank you!
Thank you Natalie! I'll see if we can count them.
… holodiscus, 15 January, 2020 - 1:22pm login or register to post comments

Moved
Moved from ID Request.
… Ken Wolgemuth, 10 December, 2019 - 2:18pm login or register to post comments

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