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ARS Home » Southeast Area » Miami, Florida » Subtropical Horticulture Research » Research » Publications at this Location » Publication #411479

Research Project: Mitigation of Invasive Pest Threats to U.S. Subtropical Agriculture

Location: Subtropical Horticulture Research

Title: Synergistic effects of selected insecticides on Caribbean fruit fly, Anastrepha suspensa

item Yang, Xiangbing
item Cloonan, Kevin
item Tabanca, Nurhayat

Submitted to: International Congress of Entomology
Publication Type: Abstract Only
Publication Acceptance Date: 12/20/2023
Publication Date: N/A
Citation: N/A

Interpretive Summary: Abstract Only.

Technical Abstract: Caribbean fruit fly, Anastrepha (A.) suspensa, has been a major insect pest in subtropical and tropical fruit crop in USA and many countries in central America and Caribbean islands. A. suspensa damages fruit crops (i.e. citrus, Surinam cherry, guava etc) by laval feeding internally on the ripening fruit and infested fruits will not be marketable and caused millions of dollars loss. Current management of this pest relies on the traps that baited with food and insecticides, however, continuous use of insecticide will raise issues like resistance development, environmental contamination, and negative impact on non-target organisms. However, the resistance development of A. suspensa against insecticides has been little studied. In this presentation, the resistance of field collected A. suspensa has been evaluated as compared to the susceptible lab strain. From 2021 to 2022, the resistance ratio of wild A. suspensa has been 5.5 and 6.1 for organophosphate (< 10, i.e. methomyl), indicating a mild range of resistance developed. Meanwhile, a lab selected resistant strain of A. suspensa (with resistance ratio > 10) was used to analyze the enzyme activity and determine the effect of synergists (PBO or DEM) on toxicity of A. suspensa to better understanding the chemical response of resistant A. suspensa. In addition, management of this pest with alternative plant based chemicals was also evaluated and discussed to develop biorational management for A. suspensa.