Soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is currently the most important insect pest of soybean (Glycine max (L.) Merr.) in the United States and causes significant economic damage worldwide, but little is known about the aphid at the molecular level. Mariner-like transposable elements (MLEs) are ubiquitous within the genomes of arthropods and various other invertebrates....

The nature of the amino acids in the N-terminal 'DAGX' motif of the coat protein of tobacco vein mottling virus (TVMV) that have a direct effect on aphid transmissibility of the virion were further defined by site-directed mutagenesis. In the first position of the DAGX motif, Asp or Asn are required for aphid transmissibility. In the second position, the nonpolar residue Ala, but not the nonpol...

Soybean aphid (Aphis glycines Matsumura) is a severe pest of soybean in central North America. Outbreaks of the aphid in Ontario are often spotty in distribution, with some geographical areas affected severely and others with few or no aphid populations occurring in soybean for the duration of the season. A. glycines spend summers on soybean and overwinter on buckthorn, a shrub that is widespre...

lowing IPM procedures for managing grain aphids. Results Ninety-four percent of the 39 field tests comparing preventive versus IPM practices showed that IPM practices were more profitable. Few fields developed threshold aphid populations so insecticide was not applied and yields were not affected. Money was saved and total pesticide usage was reduced. Surveys of untreated fields over the last t...

Abbreviation: EAA: essential amino acid; pTU: putative transcription unit 22 2 ABSTRACT 25 Symbiotic associations involving intracellular microorganisms and animals are 26 widespread, especially for species feeding on poor or unbalanced diets. Buchnera 27 aphidicola, the obligate intracellular bacteria associated with most aphid species, 28 provide their hosts with essential amino acids (EAAs),...

BACKGROUND The soybean aphid has significantly impacted soybean production in the U.S. Transcriptomic analyses were conducted for further insight into leads for potential novel management strategies. METHODOLOGY/PRINCIPAL FINDINGS Transcriptomic data were generated from whole aphids and from 2,000 aphid guts using an Illumina GAII sequencer. The sequence data were assembled de novo using the ...

Aphid species feeding on lettuce occupy distinct feeding sites: the lettuce aphid Nasonovia ribisnigri prefers to feed on heart leaves, whereas the potato aphid Macrosiphum euphorbiae feeds only on outer leaves. The aphid parasitoid Aphelinus abdominalis, known to be able to regulate M. euphorbiae on many crops, has recently been indicated as a promising biocontrol candidate also for use agains...

The soybean aphid (Aphis glycines) has rapidly spread through the Midwest causing consistent yield losses since its introduction. In an effort to find sources of resistance to this pest, several plant introductions have been screened in controlled laboratory conditions or in few locations under field conditions. In order to better characterize different soybean resistant lines we measured resis...

Pea aphid (Acyrthosiphon pisum) clones have been shown to be adapted to particular host plant species but it is unknown whether there are host races. A 1101 base pair region of the mitochondrial cytochrome oxidase I gene (COI) was sequenced for 21 pea aphid clones that had been collected from different host plants in Canada and the U.S.A. Only five closely related mitochondrial haplotypes were ...

This paper introduces the APHID (Asynchronous Parallel Hierarchical Iterative Deepening) game-tree search algorithm. An APHID search is controlled by a master and a series of slave processors. The master searches the rst d 0 ply of the game-tree repeatedly. The slaves are responsible for the bottom plies of the game-tree. The slaves asynchronously read work lists from the master and return scor...