Comparison of pheromone trap design and lures for Spodoptera frugiperda in Togo and genetic characterization of moths caught
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Date
2018-11-29
Journal Title
Journal ISSN
Volume Title
Publisher
Entomologia Experimentalis et Applicata
Abstract
Fall armyworm, Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae), is a pest of grain and
vegetable crops endemic to the Western Hemisphere that has recently become widespread in sub-
Saharan Africa and has appeared in India. An important tool formonitoring S. frugiperda in the USA
is pheromone trapping, which would be of value for use with African populations. Field experiments
were conducted in Togo (West Africa) to compare capture of male fall armyworm using three commercially
available pheromone lures and three trap designs. The objectives were to identify optimum
trap 9 lure combinations with respect to sensitivity, specificity, and cost. Almost 400 moths were
captured during the experiment. Differences were found in the number of S. frugiperda moths captured
in the various trap designs and with the three pheromone lures, and in the number of non-target
moths captured with each lure. The merits of each trap 9 lure combination are discussed with
respect to use in Africa. A nearly equal number of COI-CS (161) and COI-RS (158) moths was captured
with no differences found in COI marker proportions among traps or lures. However, the diagnostic
rice strain marker Tpi was rarely found. Overall, the genetic characterization of the
pheromone trap collections indicated a consistent distribution of genetic markers from 2016 to 2017,
suggesting a population at or near equilibrium.
Description
Research Article
Keywords
Fall armyworm, Monitoring, Host strainmarkers, Maize, Lepidoptera, Noctuidae, Integrated pest management, IPM, Rice, Leucania loreyi, COI gene, Tpi gene