Oriental Fruit Fly: Ripening of Fruit and Its Effect on Index of Infestation of Hawaiian Papayas

Authors: Seo, Stanley T.; Farias, Gilbert J.; Harris, Ernest J.

Source: Journal of Economic Entomology, Volume 75, Number 2, April 1982 , pp. 173-178(6)

Publisher: Entomological Society of America

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Hawaiian papayas, Carica papaya L., were infested selectively by Dacus dorsalis Hendel at a 145.3-ha area in a commercial papaya orchard at Pohoiki, Hawaii, where the mean population density of the female fruit fly was ca. 992 flies per ha from November 1975 to October 1976. The infestation of papayas varied with ripeness, population densities of the new and old fruit flies, rainfall, and the minimum and maximum air temperatures during daytime. The significant factors were ripeness of papaya, population density of new members of D. dorsalis, and the maximum air temperature. Induced oviposition of papaya at 24.8°C decreased from 10.8 times in ripe fruit to 1.7 times in mature green fruit. The stadium of the 1st instar was lengthened by 1 to 2 days in green fruit. The result of the natural environmental factors, fruit fly behavior, and resistance of papayas was a low index of D. dorsalis infestation of 0, 0, 0, 0.06, or 3.85 larvae per fruit for a sample of 620 mature green, color-turning, quarter-, half-color, or ripe papayas, respectively.

Document Type: Research Article

Publication date: April 1, 1982

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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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