Marasmia trapezalis (Guenee)

Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum Bulletin 189, pp. 163-185 : 179

22. Marasmia trapezalis (Guenee) .

Salbia trapezalis Guenee, Spec. Gen., Lep. 8: 200, 1854.

Marasmia trapezaUs, Hampson, Fauna Brit. India, Moths 4: 277, 1896; Tams, Ins. Samoa 3 (4): 276, 1935.

Dededo , May 11; Mt. Alifan , May 26; Barrigada , June 24; Piti , July 31, all reared from corn by Swezey. Four specimens in U. S. National Museum, Fullaway , 1911 .

This corn leafroller is distributed around the world in the tropics. It occurs in many Pacific islands, but not in Hawaii. It was recorded in Guam by Fullaway in 1911 . We found young corn plants commonly attacked by the larvae of this moth everywhere in Guam. They roll the tip of the leaf for a hiding place or protection while feeding within. If growing conditions, are favorable the plant is not much checked, especially as the plant becomes older. Some are parasitized by a braconid, Apanteles guamensis Fullaway.