Publications by authors named "Lowell R Nault"
ABSTRACT Epidemics of aster yellows in lettuce in Ohio are caused by at least seven distinct phytoplasma strains in the aster yellows (AY) group. Five of the strains are newly reported: AY-BW, AY-WB, AY-BD3, AY-SS, and AY-SG. All seven strains were characterized based on symptoms in aster and lettuce, and by polymerase chain reaction (PCR).
View Article and Find Full Text PDFAlthough the corn leafhopper Dalbulus maidis (DeLong and Wolcott) is the most important vector of maize pathogens in Latin America, little is known about how and where it overwinters (passes the dry season), particularly in Mexico. The objectives of this study were (1) to monitor the abundance of D. maidis adults throughout the dry season in maize and maize-free habitats and (2) to determine where and how D.
View Article and Find Full Text PDFGenetic diversity in populations of Dalbulus maidis (DeLong and Wolcott) (Hemiptera: Cicadellidae) from distant localities in Brazil assessed by RAPD-PCR markers.
Environ Entomol
February 2007
Article Synopsis
- Dalbulus maidis populations in northeastern and central-southern Brazil exhibit morphological differences, indicating possible genetic isolation.
- A study was conducted using RAPD-PCR to analyze genetic differences among populations from five locations, revealing a high percentage of polymorphic loci (78%) and strong genetic similarity (over 0.72).
- Gene flow estimates were high (up to 8.53) between central-southern populations, while the northeastern population from Mossoró/RN showed low gene flow and significant genetic isolation from the others.