Chemical and Cultural Control of the Sunflower Moth1 In Texas2

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Tests were conducted to determine the effectiveness of 14 insecticides for control of Homoeosoma electellum (Hulst). Tests at McCregor, Tex., showed that VCS 506 (O- (4-bromo- 2,5 - dichlorophenyl) O-methyl phenylphos. phonothioate), endosulfan, diazinon, GS-13005 (O,O-dimethyl phosphorodithioate S-ester with 4- (mercapto- methyl) -2-methoxy-Δ2-1,3,4-thiadiazolin-5-one), methyl parathion, and naled reduced the larval infestation following 2 and 3 spray applications, Plots treated twice with endosulfan, diazinon. GS-13005, and methyl parathion had significantly increased yields. Following 3 applications, all treated plots yielded significantly more seed per acre than the untreated plots. Test at College Station, Tex., showed that 2 conventional low volume applications of AzodrinĀ® (3 - hydroxy-N - methyl - cis- crotonamide dimethyl phosphate), carbaryl, malathion, azinphosmethyl, mevinphos, Dursban (O,O -diethyl O-3.5,6 trichloro-2- pyridyl phosphorothioate), toxaphene, and parathion reduced the number of larvae and increased yields. Larval reductions and increased yields were also obtained after 2 ultra low volume applications of methyl parathion, azinphosmethyl. and malathion.

Dates of planting studies showed that sunflower moth larvae infestations were lowest in plots planted April 15 or later. Low insect levels did not always result in high seed yields, in most cases because of inadequate moisture

Oviposition studies indicated that the greatest sunflower moth oviposition occurred on the 3rd day after sunflower heads opened. Also, approximately 75,0% of sunflower moth oviposition was completed by the end of the 6th day after the heads opened.

Document Type: Research Article

Publication date: December 1, 1969

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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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