Oriental Fruit Moth Studies In South Carolina-1931

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I. A study of the larval parasites of the Oriental fruit moth at Clemson College during 1931 demonstrated the ability of Macrocentrus ancylivorus to survive successfully the winter of 1930-1931. Thirty-four and five-tenths per cent of the Oriental fruit moth larvae feeding in twigs were destroyed by parasites during the season. There appeared to be a synchronization between the abundance of parasite and host prior to time of Elberta harvest.

II. Insectary studies indicate that there is a definite relationship beween temperatures at sunset and egg deposition. No eggs were deposited when sunset temperatures were lower than 60 degrees F.; egg deposition was gradually accelerated as temperatures increased from 60 to 75 degrees F.; optimum deposition occurred from 76 to 85 degrees F., and egg deposition was greatly retarded when sunset 1GraPholitha (Laspeyresia) molesta Busck.

2Technical Contribution No. 24 (New Series) from the South Carolina Agricultural Experiment Station. temperatures in excess of 85 degrees F. were recorded. Considerable significance is attached to the fact that sunset temperatures were unusually high and egg laying materially reduced during the 12-day period (June 22-July 2) which coincided with one-third of the time during which second brood eggs were being deposited.

III. Life history studies with regard to picking time of Elbertas indicate that overwintering larvae could have developed in late-ripening Elbertas. especially drops or those remaining on trees, and in all varieties ripening thereafter.

Document Type: Research Article

Publication date: August 1, 1932

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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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