spotted alfalfa aphid
noun Date: 1958 a highly destructive Old World aphid (Therioaphis maculata) that is established in the United States in warmer areas and causes yellowing and stunting of affected plants

New Collegiate Dictionary. 2001.

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  • spotted alfalfa aphid — noun : a highly destructive Old World aphid (Therioaphis maculata) established in warmer areas of the United States that causes yellowing and stunting of infested plants and especially alfalfa by injecting a toxic saliva while feeding * * * a… …   Useful english dictionary

  • spotted alfalfa aphid — a pale yellowish aphid, Therioaphis maculata, of the southern U.S., esp. west of the Mississippi River, that is marked with black spots and has fine spines on its back: a pest mainly of alfalfa and some other legumes, as clover. [1955 60] * * * …   Universalium

  • spotted alfalfa aphid — noun a yellow green aphid, Therioaphis trifolii, with rows of spots across the body; a pest of lucerne or clover; accidentally introduced into Australia from the Mediterranean and the Middle East …   Australian English dictionary

  • spotted aphid — or spotted alfalfa aphid, a tiny yellow aphid that is very destructive to alfalfa, found in the warmer parts of North America …   Useful english dictionary

  • Spotted lady beetle — Coleomegilla maculata Coleomegilla maculata on stem Scientific classification Kingdom: Animalia …   Wikipedia

  • alfalfa — /al fal feuh/, n. a plant, Medicago sativa, of the legume family, usually having bluish purple flowers, originating in the Near East and widely cultivated as a forage crop. Also called lucerne, purple medic. [1835 45; < Sp, var. of alfalfez <… …   Universalium

  • Biological pest control — Biological control of pests in agriculture is a method of controlling pests (including insects, mites, weeds and plant diseases) that relies on predation, parasitism, herbivory, or other natural mechanisms. It can be an important component of… …   Wikipedia

  • 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

  • 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

  • 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

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