Factors That Affect Reproduction of the Garden Symphylan, Scutigerella immaculata

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Abstract:

The garden symphylan, Scutigeralla immaculala (Newport), was reared in jars of soil in the laboratory. No reproduction occurred when the food provided was compressed yeast, cow manure, green rye plants buried in the soil, or a leaf litter-humus mixture. Reproduction was greater on fresh carrot than on that which was first boiled or frozen. Carrot root or lettuce leaf produced larger populations than bean, alfalfa, barley, or rye roots. Reproduction did not occur unless carrot was provided for food regardless of the organic matter content of the soil.

Adding limestone, calcium oxide, or sulfur to the soil had no effect on symphylan reproduction. Urea and calcium nitrate (75 ppm N) did not effect, superphosphate (32.8-131.1 ppm P) slightly increased and muriate of potash (24.9-83 ppm K) decreased reproduction.

There was no reproduction at 0.5% soil moisture (soil moisture equivalent was 21%) but it was equally good at 10-30%. Reproduction was nil at 39 or 55° but good at 60-80°F. It was about the same in total darkness or 16-hr photoperiod. The rate of increase declined as the initial population increased from 10 to 80 symphylans per jar. Drying and storing soil after collection from the field and before use in the laboratory had no effect on symphylan reproduction.

Document Type: Research Article

Publication date: December 1, 1966

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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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