Journal
JOURNAL OF INTEGRATIVE AGRICULTURE
Volume 15, Issue 12, Pages 2803-2808Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S2095-3119(16)61478-8
Keywords
insecticide resistance; spinosad; bioassay; Frankliniella occidentalis
Categories
Funding
- National Natural Science Foundation of China [31371942]
- National Key Research and Development Program, China [2016YFC1200600]
- Ministry of Science and Technology, China
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The western flower thrips, Frankliniella occidentalis, is one of the most destructive sucking pests of vegetables, fruits and ornamental crops in China. Spinosad is one of the most commonly used insecticides to manage thrips. To assess the incidence of spinosad resistance in F. occidentalis field populations in eastern China, survival rates for 24 different populations were compared with those of a susceptible laboratory strain. All populations showed significantly higher resistance to spinosad compared with the control as determined by comparing median lethal concentrations. Two populations from Shouguang and Liaocheng in Shandong Province were classified as having moderate and high levels of resistance to spinosad with a mean resistance ratio of 17.0 and 89.2, respectively. Our research indicates a widespread reduction in spinosad efficacy for controlling F occidentalis field populations, and that resistance management strategies should be implemented as soon as practicable, to reduce the potential of progressive resistance development and loss of efficacy.
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