diseased beet

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• Signs of pathogen presence in diseased plants — ▪ Table Signs of pathogen presence in diseased plants* sign description examples acervulus a shallow, saucer shaped fungal structure that bears asexual spores (conidia); it is usually formed below the cuticle or epidermis of leaves, stems, and… …   Universalium

• plant disease — ▪ plant pathology Introduction       an impairment of the normal state of a plant that interrupts or modifies its vital functions.       All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …   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

• Nematology — Part of a series on Zoology …   Wikipedia

• curly top — Plant Pathol. a disease of plants, esp. beets, characterized by puckered or cupped leaves and stunting or distortion, caused by a virus, Ruga verrucosans. [1900 05, Amer.] * * * ▪ plant disease also called  Western Yellow Blight,         viral… …   Universalium

• agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …   Universalium

• Cassava — Leaves(Also known as Tapioca in Kerala India) A manioc tuber …   Wikipedia

• Columbian Exchange — Inca era terraces on Taquile are used to grow traditional Andean staples, such as quinoa and …   Wikipedia

• Italy — • In ancient times Italy had several other names: it was called Saturnia, in honour of Saturn; Enotria, wine producing land; Ausonia, land of the Ausonians; Hesperia, land to the west (of Greece); Tyrrhenia, etc. The name Italy, which seems to… …   Catholic encyclopedia

• Potato — Irish potato redirects here. For the confectionery, see Irish potato candy. For other uses, see Potato (disambiguation). Potato …   Wikipedia

• Pasteur, Louis — born Dec. 27, 1822, Dole, France died Sept. 28, 1895, Saint Cloud, near Paris French chemist and microbiologist. Early in his career, after studies at the École Normale Supérieure, he researched the effects of polarized light on chemical… …   Universalium