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HornwormsLarge green/yellow hornworm?
September 17, 2009
I noticed that our forsythia plant appeared to have died, but upon closer inspection, found a large yellow/green critter on it. Can you help me Identify the caterpillar?
Brian
rock hill south carolina
Rustic Sphinx Caterpillar
Hi Brian,
We looked at all the possible Sphinx Caterpillar candidates found in South Carolina on Bill Oehlke’s website before deciding that the Rustic Sphinx, Manduca rustica, is the likeliest possiblity for your individual. The real decisive factor is the food plant forsythia. Forsythia is in the olive family Oleaceae, and the Rustic Sphinx Caterpillar feeds on the leaves of plants in that family.
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