Yellow dwarfs

Vinca proliferation Phyllody disease of periwinkle dwarfing Yellowing Ploaie et al. (1977)... 

Hemerocallis minor (dwarf, yellow day-lily) poUen 128... 

Encecalin (I) causes a dwarfing of lettuce shoots at concentrations from lOppm and up. On the other hand, eupatoriochromene (II) causes very little dwarfing of the seedling but does inhibit germination of lettuce at lOOppm and above. The concentration of these two chro-raenes in yellow starthistle may indeed allow for some effect to be exerted on the surrounding plant community. 

Habili, N., Mclnnes, J.K., and Symons, R.H. (1987) Non-radioactive photobiotin-labelled DNA probes for the routine diagnosis of barley yellow dwarf virus. J. Virol. Meth. 16, 225-237. 

The confusion over the correct variety of feverfew is further complicated by the existence of another genus of plants, Matricaria, the leaves of which are very similar to those of feverfew but the flowers of which are different [7] (for example, Snow Dwarf, with all white flowers. Golden Ball with all yellow flowers, and Tom Thumb, which looks like a cross between the two). These attractive looking plants are sometimes sold as feverfew . Again, there has been no reported scientific work on these related species per se and the work quoted here for the true wild feverfew may not necessarily apply to these feverfew-like plants. 

Disregarding for a moment the bright and dark bands that decorate the spectrum of a heavenly body at specific wavelengths, the overall hue of that spectrum can tell us the surface temperature of the object. A blue star is thus hotter than a yellow one, and a yellow star is hotter than a red one. The Sun is hotter at the surface than the red star Antares, which in turn stands as a torrid desert before the brown dwarfs or interstellar clouds. The stars go red with cold. 

Let us review all this. At an age of 12 billion years, the yellow dwarf will mutate into a red giant with 100 times the radius. This in turn will give way to a vaporous cloud with a very small white object at its centre. When the yellow dwarf has handed over to the white dwarf, the solar pageant will be close to an end. But for the moment, the Sun still shines staunchly. 

Hefferon, K.L. and Dugdale, B.G. (2003). Independent expression of Rep and RepA and their roles in regulating bean yellow dwarf virns replication J. Gen. Virol. 84 3465-3472. 

Mclnnes et al., 1987), for the diagnosis of barley yellow dwarf virus (Habili et al., 1987), to assay luteinizing hormone (3 mRNA in individual gonadotropes (Childs et al., 1987), and to perform DNA mapping using a cross-hybridization technique (Chetrit et al., 1989). 

Catherall, P.L. Effects of barley yellow dwarf virus on the growth and yield of single plants and simulated swards of perennial rye-grass. Ann Appl Biol 1966 57 155-162. 

At some point, the Sun becomes so extended that the surface gravity is too weak to hold the atmospheric gas dust, and this mixture blows out of the star as a stellar wind. The Sun in this state is called a planetary nebula, with a hot central blue-violet star surrounded by rings of yellow and red. The rings are made of material from the Sun that has been blown into space. The core becomes a white dwarf (figure 7.8). 

Yellow dwarfs Small, Main Sequence stars. Example the Sun... 

Pine Needle Oil, Dwarf, occurs as a colorless or yellow liquid with a pleasant, aromatic odor and a bitter, pungent taste. It is the volatile oil obtained by steam distillation of fresh leaves of Pinus mugo Turra var. pumilio (Haenke) Zenari (Fam. Pinaceae). It is soluble in most vegetable oils, but insoluble in alcohol and in propylene glycol. 

Rice dwarf virus (RDV), 72, 108 Rice yellow motde virus (RYMV), 205 RNA genome... 

Roots infected with the disease aster yellows are small, woody, hairy, and taste bitter. See Young leaves yellow and dwarfed growth bushy above for controls. 

Leaves yellow and mottled stalks twisted plant dwarfed. Cause Celery mosaic. Destroy infected plants. Control aphids because they can spread viral diseases as they feed. Prevent problems by planting resistant cultivars such as Florida 683 and Utah-52-70R Improved . 

Viral diseases such as maize dwarf mosaic can cause poor kernel formation at base of ears or bare ears. See Leaves mottled yellow and green on page 78 for more symptoms. 

Young leaves are dwarfed, curled, or twisted. Cause Aster yellows. There is no cure for infected plants destroytthem. Control leafhoppers because they spread this disease. See Leaves pale plant stunted above for leafhopper controls. 

Parsley has few problems. Handpick leafeating caterpillars or spray plants with BTK. Dwarfed or abnormally crinkled leaves can be caused by viruses. Destroy infected plants, and control aphids and other sucking insects that spread viral diseases. Dark, yellow-bordered spots are leaf blight caused by fungi. Spray with fish emulsion or with sulfur ii disease is severe. Carrot weevils eat roots and make leaves yellow for controls, see Roots with dark tun--nels on page 61. See the Herbs entry beginning on page 116 for other possible problems. 

Symptoms This disease produces a gradual yellowing of leaves. Plants often appear dwarfed. Plant parts, including roots and flowers, may be deformed. On trees, leaves turn yellow, then brown, and may drop early. Symptoms appear over the whole crown of the tree. Plants may die in a single giowing season. 

Doi, Y., Teranaka, M., Yora, K. and Asuyama, H. (1967). Mycoplasma or PLT group-like micro-organisms found in the phloem elements of plants infected with mulberry dwarf, potato witches, broom, aster yellow or Paulownia witches broom. Annals of Phytopathological Society of Japan, 33 259-266. 

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