Insect Identification logo
Icon of the state of Texas
Icon of a spider
Icon of a beetle insect
Icon of a butterfly
Icon of a bee
Icon of the Bugfinder utility

Potato Aphid (Macrosiphum euphorbiae)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Potato Aphid.

 Updated: 3/19/2019; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Potato Aphids can infest a variety of vegetable plants including tomatoes, leaving a sad bush and ruined fruit in their wake.



Members of the Aphid family, Potato Aphids are voracious plant suckers. Their mouth parts pierce plant tissue and they suck the life out of leaves and stems when in large numbers. Aphids are rapid reproducers so many generations can infest the same plant, which makes controlling their numbers problematic. Spraying affected plants with insecticide can help for a while, but new eggs that survived the chemical application can hatch and restart a population in weeks if not days. Natural predators are drawn to affected plants, but large populations may survive without a large population of predators to reduce their numbers and maintain them.

Plants suffer from the presence of aphids in a few ways. Depletion of xylem and phloem (water and liquid plant food) weakens and starves it. Many leaves of the plant will dry out and die, making photosynthesis and the creation of glucose difficult. Once leaves shrivel up and die, fruit is exposed to more sunlight than usual which can scald it, making it visually less appealing if not inedible. Aphids also secrete a sweet liquid substance called 'honeydew' which attracts other insects like ants to the plant. The honeydew can grow mold and mildew on it, eventually creating black ashy spots on the plant. One large, healthy population of aphids can do all of this damage despite their diminutive size. This is why the tiny Potato Aphid is the bane of many a gardener.
Harmful insect icon




Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Hemiptera
        Family: Aphididae
          Genus: Macrosiphum
            Species: euphorbiae
Identifying Information
Scientific Name: Macrosiphum euphorbiae
Category: True Bug
Size (Adult; Length): 2mm to 4mm (0.08in to 0.16in)
Colorwheel Graphic Colors: white, red, pink, garden pest, crop pest
Descriptors: tomato, potato, cluster, congregation, infest, small, harmful
Territorial Map
Alaska  
Hawaii  
Prince Edward Is.  
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic


Territorial Reach (A-to-Z)
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.