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1 February 2011 Onion Thrips (Thysanoptera: Thripidae): A Global Pest of Increasing Concern in Onion
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Abstract

During the past two decades, onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), has become a global pest of increasing concern in commercial onion (Allium cepa L.), because of its development of resistance to insecticides, ability to transmit plant pathogens, and frequency of producing more generations at high temperatures. T. tabaci feeds directly on leaves, causing blotches and premature senescence as well as distorted and undersized bulbs. T. tabaci can cause yield loss >50% but can be even more problematic when it transmits Iris yellow spot virus (family Bunyaviridae, genus Tospovirus, IYSV). IYSV was identified in 1981 in Brazil and has spread to many important onion-producing regions of the world, including several U.S. states. IYSV symptoms include straw-colored, dry, tan, spindle- or diamond-shaped lesions on the leaves and scapes of onion plants and can cause yield loss up to 100%. Here, we review the biology and ecology of T. tabaci and discuss current management strategies based on chemical, biological, and cultural control as well as host resistance. Future directions for research in integrated pest management are examined and discussed.

© 2011 Entomological Society of America
John Diaz-Montano, Marc Fuchs, Brian A. Nault, József Fail, and Anthony M. Shelton "Onion Thrips (Thysanoptera: Thripidae): A Global Pest of Increasing Concern in Onion," Journal of Economic Entomology 104(1), 1-13, (1 February 2011). https://doi.org/10.1603/EC10269
Received: 16 July 2010; Accepted: 1 November 2010; Published: 1 February 2011
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