Responses of Maturing Larvae of Anastrepha suspensa to Light and to Immersion in Water

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Water was used to collect maturing larvae of Anastrepha suspensa (Loew) as they moved out of the rearing medium. With a 14-h photophase at 25–26°C, hourly departures of larvae from the medium began to accelerate 4–5 h before initiation of the light phase. Larval departure peaked each day during the 1st h of the photophase and more than 50% were collected in the first 5 h of the period. In continuous darkness, mature larvae moved out of the medium but the rate per hour never exceeded 5% of the total larval collection.

Development was delayed by holding larvae in water. There was a difference of 1 day in peak of emergence between the control and in larvae remaining in water for 24 h. This occurred without a lengthening of the overall emergence period.

Mature larvae could be held in water for ca. 12 h with no marked effect on emergence. Mortality reached ca. 10% in larvae kept in water for 16 h and increased to ca. 20% when held for 24 h. Holding larvae in water for 16 h or longer resulted in more pupae retaining a larval form and a reduction in emergence.

Document Type: Research Article

Publication date: December 1, 1974

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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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