. Cooperative economic insect report. Beneficial insects; Insect pests. - 1047 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ^ SWfiETPOTATO STEM BORER (Omphisa anastomosalis (Guen.)) Economic Importance: This pyraustid borer is a serious pest of sweetpotatoes in the Indo-Malayan Region and Hawaii. In Hawaii it has been referred to as perhaps the most injurious enemy of this crop, but in China it is reported to be a minor pest. The larvae damage both roots and stems and may kill the plants. The insect has been intercepted occasionally at U. S. ports of entry. Distribution: China, Formosa, I
. Cooperative economic insect report. Beneficial insects; Insect pests. - 1047 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ^ SWfiETPOTATO STEM BORER (Omphisa anastomosalis (Guen.)) Economic Importance: This pyraustid borer is a serious pest of sweetpotatoes in the Indo-Malayan Region and Hawaii. In Hawaii it has been referred to as perhaps the most injurious enemy of this crop, but in China it is reported to be a minor pest. The larvae damage both roots and stems and may kill the plants. The insect has been intercepted occasionally at U. S. ports of entry. Distribution: China, Formosa, India, Ceylon, Japan, Burma, Indonesia (Java), New Guinea, Thailand, Philippine Islands, Hawaii, Malaya. Hosts: Sweetpotatoes. Also reported from some other vegetable General Distribution of Omphisa anastomosalis Life History and Habits: In Hawaii, eggs are laid singly or in groups of 2 or 3 in crevices in the stems or on the leaves. The young larvae bore into the stem and roots whea^e they tunnel and feed. The larvae spin a light cocoon and pupate within the plant parts. One report shows that a female in confinement in Hawaii laid 70 eggs in one night. In this case, the egg stage lasted 6 days, larval period 27 to 36 days and the pupal period 12 to 16 days. (Pyraustinae, Lepidoptera) 1- Excluding Hawaii. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant Health Service
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