A pasture grass grown mainly in the temperate regions of the Old World. Daktulosphaira vitifoliae
The new scientific name for Phylloxera vitifoliae of grapes. Damping-off
A disease of very young seedlings, which rots the stem at the soil surface. Affected seedlings then fall over like miniature, felled trees. The disease is caused by fungi such as Phytophthora, Pythium, and Rhizoctonia, and it is greatly aggravated by over-watering, which should be avoided.
Otherwise, the best methods of controlling the disease are to use soils that have either been pasteurised with steam heat, or treated with a fungicidal soil drench. Dandelion
See: Taraxacum. Darwin, Charles
The English discoverer of evolution, Charles Robert Darwin (1809-82) was appointed to the post of naturalist on the scientific expedition of HMS Beagle (1831-6). In 1842, he bought Down House, in Kent, where he lived for the rest of his life, suffering from Chagas disease, which he had contracted in South America. Having a private income, he could investigate as he pleased and at his own slow pace. By 1844 he had developed his theory of evolution but he delayed publication until a note from Alfred Wallace revealed his independent discovery of the same idea. In 1858, their joint paper was read to the Linnaean Society and, in 1859, Darwin published his famous book On the Origin of Species by Means of Natural Selection. The book was widely and quickly recognised, but opposition came from religious groups who preferred a literal interpretation of the Bible.
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