grain aphid

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• english grain aphid — noun Usage: usually capitalized E : a pale green aphid (Macrosiphum avenae) with dark markings that is native to Europe but widespread in No. America and that feeds on grasses and small grains, being especially destructive when feeding on the… …   Useful english dictionary

• apple grain aphid — noun : a yellowish green aphid (Rhopalosiphum fitchii) with dark bands on the abdomen that produces its fertilized eggs on apple and related trees and feeds on their leaves in early spring but passes most of the growing season on various small… …   Useful english dictionary

• wheat aphid — noun or wheat aphis : any of several plant lice of the family Aphididae (as the grain aphid Macrosiphum granarium and Rhopalosiphum prunifoliae) that suck the sap of growing wheat called also wheat louse, wheat plant louse …   Useful english dictionary

• Wheat aphid — Wheat Wheat (hw[=e]t), n. [OE. whete, AS. hw[=ae]te; akin to OS. hw[=e]ti, D. weit, G. weizen, OHG. weizzi, Icel. hveiti, Sw. hvete, Dan. hvede, Goth. hwaiteis, and E. white. See {White}.] (Bot.) A cereal grass ({Triticum vulgare}) and its grain …   The Collaborative International Dictionary of English

• Russian wheat aphid — Scientific classification Kingdom: Animalia Phylum …   Wikipedia

• yellow sugarcane aphid — noun : a plant louse (Sipha flava) that feeds on sugarcane, grain, and orchard grass in the southern United States …   Useful english dictionary

• Barley yellow dwarf — Taxobox virus group = iv familia = Luteoviridae genus = Luteovirus species = Barley yellow dwarf virusBarley yellow dwarf is a plant disease caused by the barley yellow dwarf virus, and is the most widely distributed viral disease of cereals. It… …   Wikipedia

• Apple — This article is about the fruit. For the technology company, see Apple Inc.. For other uses, see Apple (disambiguation). Apple tree redirects here. For other uses, see Apple tree (disambiguation) …   Wikipedia

• macrosiphum — ˌmakrōˈsīfəm noun Usage: capitalized Etymology: New Latin, from macr + Greek siphōn tube more at siphon : a genus of large often pink or green aphids including a number of economically important plant pests some of which are vectors of virus… …   Useful english dictionary

• rhopalosiphum — ˈsīfəm noun Usage: capitalized Etymology: New Latin, probably from rhopal + Greek siphōn tube, pipe more at siphon : a widely distributed genus of aphids including several that attack numerous crop plants and some that are vectors of plant… …   Useful english dictionary

• 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