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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Flies, moths, wasps,and other insects with obvious wings - Under 1/4 inch long > Whiteflies

Rose aphid
Photo Credit: Jeff Hahn, Univ. of Minnesota Rose aphid
Photo Credit: Carl Rosen, Univ. of Minnesota

Size: 1/16 inch long

Where/When: Found on tomatoes and other plants transplanted into the garden. They can be inadvertently infested when started from seed indoors and brought outside when transplanted. Active during mid to late summer.

Significance: Infested leaves can yellow and drop, reducing plant vigor. However, numbers are usually not high enough to cause serious damage to plants. Whiteflies do not survive winters outdoors in Minnesota.
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