Control of Sunflower Moth Larvae and Their Damage to Sunflower Seeds¹

Author: CARLSON, ELMER C.

Source: Journal of Economic Entomology, Volume 60, Number 4, August 1967 , pp. 1068-1071(4)

Publisher: Entomological Society of America

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Abstract:

Investigations on the control of the sunflower moth, Homoeosoma electellum (Hulst), conducted during several seasons have shown that certain insecticides satisfactorily reduced sunflower-head and seed damage when multiple applications were timed properly. Endosulfan and diazinon afforded the most efficient control among the commercially available materials tested. These treatments must begin at onset of bloom and 3 applications at intervals of 5-7 days arc optimum. Two applications were a minimum requirement. but 3 were generally needed because of the fast head growth, quick flowering, and concentrated egg deposition during this period. A biological agent was found to be unsatisfactory for control, and only one of several code-named chemicals tested. GS 13005 (O,O-dimethyl phosphorodithioate S-ester with 4- (mercaptomethyl) -2-methoxy-Δ²-1,3,4-thiadiazolin-5-one was outstanding.

A new inbred selection of sunflower plants had many advantages for this test work, especially because of its shorter stalks and large heads and seeds. It bloomed early and uniformly for a shorter period; this feature appeared to retard the buildup of infestations and made chemical control easier. One larva severely damaged 9 or more seeds; moderate to severe infestations of 12-24 larvae per head caused serious seed loss. Pesticide control was generally needed for growing the crop, but the actual amount of damage varied from season to season.

Document Type: Research article

Publication date: 1967-08-01

More about this publication?

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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