R
R. L. Ridgway
Researcher at United States Department of Agriculture
Publications - 8
Citations - 551
R. L. Ridgway is an academic researcher from United States Department of Agriculture. The author has contributed to research in topics: Lymantria dispar & Sex pheromone. The author has an hindex of 6, co-authored 8 publications receiving 541 citations.
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Journal ArticleDOI
Identification of a neuropeptide hormone that regulates sex pheromone production in female moths.
Ashok K. Raina,Howard Jaffe,Thomas G. Kempe,P. Keim,R. W. Blacher,Henry M. Fales,Clark T. Riley,Jerome A. Klun,R. L. Ridgway,D. K. Hayes +9 more
TL;DR: A pheromone biosynthesis activating neuropeptide (PBAN) hormone was identified from the brain-subesophageal ganglion complexes of the adult corn earworm, Heliothis zea, and induced production of a normal quantity of sex pherOMone in ligated H. zea females, indicating that this or similar peptides may be responsible for the regulation of phersomone production in moths.
Journal ArticleDOI
Isolation and primary structure of a peptide from the corpora cardiaca of Heliothis zea with adipokinetic activity.
Howard Jaffe,A K Raina,Clark T. Riley,B A Fraser,G M Holman,R.M. Wagner,R. L. Ridgway,D. K. Hayes +7 more
TL;DR: An adipokinetic hormone was isolated from the corpora cardiaca of the corn ear worm moth, Heliothis zea, and purified by reversed phase high performance liquid chromatography and found to have lipid mobilizing activity in H. zea adults.
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Enhancement of Activity of Bacillus thuringiensis Berliner Against Four Lepidopterous Insect Pests by Nutrient-Based Phagostimulants
Robert R. Farrar,R. L. Ridgway +1 more
TL;DR: Food consumption was generally lower on the treatments that contained phagostimulants causing the highest rates of mortality, possibly as a result of more rapid ingestion of a lethal dose of phagOSTimulant.
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Control of third and fourth instar gypsy moth (Lepidoptera: Lymantriidae) with Gypchek combined with a stilbene disulfonic acid additive on individual shade trees.
Ralph E. Webb,N. H. Dill,John D. Podgwaite,Martin Shapiro,R. L. Ridgway,J. L. Vaughn,L. Venables,R. J. Argauer +7 more
TL;DR: Analysis of larvae collected from the plots revealed that the plots treated with LdMNPV and Blankophor BBH had significantly (P < 0.05) more larval mortality and significantly lower LT50 values than did plots treating with L dM NPV alone.
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Nuclear Polyhedrosis Virus of the Gypsy Moth (Lepidoptera: Lymantriidae): Potency and Effects of Selected Adjuvants on Insect Feeding Behavior
TL;DR: The potency of two formulations of the nuclear polyhedrosis virus of the gypsy moth was evaluated in the laboratory and a Forest Service-recommended tank-mix preparation was found to be about 20 times more potent than an experimental wettable powder preparation.