aster leafhopper
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Aster yellows — is a disease caused by a phytoplasma (Aster Yellows Phytoplasma) [Bai et al. Living with genome instability: the adaptation of phytoplasmas to diverse environments of their insect and plant hosts. J. Bacteriol. 2006 May;188(10):3682 96.]… … Wikipedia
aster yellows — Plant Pathol. a dwarfing and yellowing of asters and various other plants, caused by a mycoplasma transmitted by a leafhopper. [1920 25] * * * ▪ disease plant disease once thought to be caused by a virus but now believed to be of… … Universalium
leafhopper — /leef hop euhr/, n. any of numerous leaping, homopterous insects of the family Cicadellidae that suck plant juices, many being serious crop pests. Also called jassid. [1850 55, Amer.; LEAF + HOPPER] * * * Any of the small, slender, often… … Universalium
aster yellows — noun plural : a widespread virus disease of the aster and many other plants characterized by yellowing and dwarfing and a greenish tinge to the flower heads and transmitted by leafhoppers * * * Plant Pathol. a dwarfing and yellowing of asters and … Useful english dictionary
Jaunisse de l'aster — La jaunisse de l aster (en anglais Aster yellows) est une maladie des plantes chronique et systémique provoquée par un micro organisme semblable à une bactérie appelé phytoplasme[1]. Cette maladie est largement répandue en Amérique en Europe et… … Wikipédia en Français
homopteran — /heuh mop teuhr euhn, hoh /, adj. 1. homopterous. n. 2. a homopterous insect. [1835 45; see HOMOPTEROUS, AN] * * * ▪ insect order Introduction any of more than 32,000 species of sucking insects, the members of which exhibit considerable… … Universalium
Pyrethrum — refers to several Old World plants of the genus Chrysanthemum (e.g., C. coccineum ) which are cultivated as ornamentals for their showy flower heads. It is also the name of a natural insecticide made from the dried flower heads of C.… … Wikipedia
