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Onion
Thrips -
Damage to Onions
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The onion thrips is a perennial pest of
onions in the Northeast. Thrips puncture
the individual leaf cells with chewing mouthparts
and sucking up the exuding sap. This causes
longitudinal, silvery mottling or blotching
on the onions. Both the adult and nymph
feed mainly between the sheaths of newly
emerging onion leaves. This feeding habit
makes them difficult to detect unless the
inner leaves are parted. Large numbers of
thrips produce scars so numerous and close
together that entire onion leaves may look
white and desiccated. Leaf distortion then
occurs followed by withering, browning and
eventually lodging. Thrips feeding in large
enough populations can result in reduced
onion yields, increased incidence of bacterial
rot, and outright death of seedlings. Onion
thrips are more of a problem during hot
and dry weather. |
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How to manage onion thrips on onions
Return to onion thrips life cycle
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Select this link to browse the insect pests
arranged alphabetically with links to their descriptions
and life cycle information and the crops they affect.
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Some information on this page
taken from Insects of Onions and Cabbage: Cornell Cooperative Extension
factsheet number 102GFS750.75 authored by J. T. Andaloro and A. M. Shelton.
©All
material is protected by Section 107 of the
1976 copyright law.
Copyright is held by Cornell University.
Maintained by Jason D. Plate. Last updated Mar. 8th, 2007.
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