| pierce's disease of grapevines: identification of the primary vectors in north carolina. | abstract in the past 10 years, the winegrape industry in the southeastern united states has experienced rapid growth; however, further expansion may be inhibited by pierce's disease (pd). epidemiological studies were conducted to identify the primary vectors of xylella fastidiosa, the cause of pd of grape, by surveying sharpshooter population dynamics in the eastern piedmont and coastal plain regions of north carolina. sharpshooter species were assessed for the presence of x. fastidiosa in the f ... | 2007 | 18943514 |
| seasonal abundance and natural inoculativity of insect vectors of xylella fastidiosa in oklahoma tree nurseries and vineyards. | xylella fastidiosa is the causative agent of diseases of perennial plants including peach, plum, elm, oak, pecan, and grape. this bacterial pathogen is transmitted by xylem-feeding insects. in recent years, pierce's disease of grape has been detected in 10 counties in central and northeastern oklahoma, prompting further investigation of the disease epidemiology in this state. we surveyed vineyards and tree nurseries in oklahoma for potential insect vectors to determine species composition, infec ... | 2015 | 26331482 |
| the oncometopia orbona species group (hemiptera, cicadellidae, proconiini). | the oncometopia orbona group of species is defined based on the characteristic structure of the male aedeagus. a key to males and females of 9 species is included, among which 5 are newly described from the u.s.a., mexico, and central america: o. orbona (f.), o. nigricans (walker), o. obtusa (f.), o. clarior (walker) (= proconia badia walker syn. n., proconia scutellata walker synonymy reinstated), o. hamiltoni sp. n., o. acicularis sp. n., o. lepida sp. n., o. pelvica sp. n., and o. unispina sp ... | 2016 | 27701350 |
| secretion of brochosomes during the ontogenesis of a leafhopper, oncometopia orbona (f.) (insecta, homoptera, cicadellidae). | secretion of brochosomes, intricately structured symmetrical protein-lipid particles produced in the specialized malpighian tubules of the cicadellidae, was studied during the ontogenesis of oncometopia orbona (f.). unlike most other cicadellids, o. orbona displays sexual dimorphism in the production of brochosomes. the malpighian tubule secretory cells of nymphs, males and young females produce spherical brochosomes of 0.3-1.4 microm in diameter, extruded after molts through the hindgut and spr ... | 2000 | 10798315 |