Characterization of greenbug (Homoptera: Aphididae) resistance in synthetic hexaploid wheats.

Characterization of General Esterases from Susceptible and Parathion-Resistant Strains of the Greenbug (Homoptera: Aphididae)

Molecular analysis of sorghum resistance to the greenbug (Homoptera: Aphididae).

Chromosomal regions of sorghum, Sorghum bicolor (L.) Moench, conferring resistance to greenbug, Schizaphis graminum (Rondani), biotypes C, E, I, and K from four resistance sources were evaluated by restriction fragment-length polymorphism (RFLP) analysis. At least nine loci, dispersed on eight linkage groups, were implicated in affecting sorghum resistance to greenbug. The nine loci were named ...

Single Strand Conformation Polymorphism Analysis Discriminates Greenbug (Homoptera: Aphididae) mtDNA Haplotypes1

Single strand conformation polymorphism (SSCP) analysis discriminated three mtDNA haplotypes in the greenbug, Schizaphis graminum (Rondani) (Homoptera: Aphididae), previously identified by sequencing a 1.0–1.2 kb portion of the cytochrome oxidase subunit I (COI) gene. Neighborjoining, maximum parsimony, and maximum likelihood analysis of a 150 b portion of the original 1.2 kb fragment of the CO...

Spatial and temporal distribution of induced resistance to greenbug (Homoptera: Aphididae) herbivory in preconditioned resistant and susceptible near isogenic plants of wheat.

Interactions between biotype E greenbugs, Schizaphis graminum (Rodani), and two near isogenic lines of the greenbug resistance gene Gb3 of wheat, Triticum aestivum L., were examined for 62 d after infestation. By comparing aphid performance and host responses on control and greenbug-preconditioned plants, we demonstrated that systemic resistance to greenbug herbivory was inducible in the resist...

Physiological modification of the host feeding site by cereal aphids (Homoptera: Aphididae).

Indole-3-acetic acid-l-14C and 14C-sucrose labels were used to study the effects of greenbugs, Schizaphis graminum (Rondani), and Russian wheat aphids, Diuraphis noxia (Mordvilko), on phloem function of wheat (Triticum aesticum L.). Greenbug feeding significantly reduced translocation from the immediate feeding site; however, phloem integrity was not impeded. In contrast, Russian wheat aphids h...