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The observations recorded in this paper indicate that the seasonal life cycle of the narcissus or daffodil fly (Merodon equestris Fab.) at Washington, D. C, is as follows: This species overwinters in the larval stage and pupation occurs during April. The higher temperatures of the greenhouse apparently hastened pupation since it took place during February, whereas outdoors it did not occur until April. Adults emerged from April 24 to June 4, and their longevity ranged from 4 to 17 days. Extracted honey proved to be a suitable food for the adults under cage conditions. Sunlight appeared to be a requisite for mating and egg deposition. Eggs were laid on the bulbs and hatched in from 2 to 9 days. Newly hatched larvae began feeding in the bulbs during May and June and were nearly full grown by November.

Ordinary earthen bulb pans, plunged in sand, in specially constructed boxes placed in a cold frame served as suitable life history cages. About 1,300 acres are now devoted to bulb production in the United States, and the states in which these commercial producing areas occur are named.

Document Type: Research Article

Publication date: June 1, 1926

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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