Field trapping and observations of male velvetbean caterpillar moths and trapping of Mocis spp. (Lepidoptera: Noctuidae: Catacolinae) with calibrated formulations of sex pheromone
1989
McLaughlin, J.R. | Heath, R.R.
Responses of male velvetbean caterpillar moths, Anticarsia gemmatalis Hubner, were examined in field tests of cone-type traps baited with the female sex pheromone compounds, (Z,Z,Z)-3,6,9-eicosatriene (C20) and (Z,ZZ)-3,6,9,heneicosatriene (C21). Various blends, formulated on rubber septa, were quantified in the laboratory for release rate and release ratio of the C20 and C21 components; the optimum release ratio (C20:C21) and rate for the capture of males were 78:22 and 10 ng/h, respectively. This specificity was not apparent unless both parameters of release rate and ratio were tested. The number of males observed flying in a viewing area in the field was increased significantly by the presence of C20:C21 blends; however, the close approach of males and sustained hovering at baits were more blend sensitive than other behaviors. Three species of the genus Mocis also responded to the velvetbean caterpillar pheromone components: disseverans (Walker), latipes (Guenee), and marcida (Guenee), M. disseverans was captured in large numbers and responded preferentially to baits that released about 50% or more C21. The most M. disseverans were captured at traps containing only C21.
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