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" Integration of Two Predaceous Stinkbugs and a Larval Parasitoid to Manage the Fall Armyworm Spodoptera frugiperda (Lepidoptera: "
Perier, Jermaine Derrick
Haseeb, Muhammad
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Latin Dissertation
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| Language of Document
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English
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| Record Number
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1106000
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TLpq2355993363
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| Main Entry
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Haseeb, Muhammad
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Perier, Jermaine Derrick
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| Title & Author
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Integration of Two Predaceous Stinkbugs and a Larval Parasitoid to Manage the Fall Armyworm Spodoptera frugiperda (Lepidoptera:\ Perier, Jermaine DerrickHaseeb, Muhammad
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| College
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Florida Agricultural and Mechanical University
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| Date
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2019
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| student score
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2019
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| Degree
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M.Agr.Sc.
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| Page No
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83
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| Abstract
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The fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is a native pest of the western hemisphere distributed from South America to North America. Currently, it is regarded as one of the most serious maize pests in the world. Global trade assisted in its invasion of the eastern hemisphere due to imported plant materials. It feeds on a host range of more than 350 plant species and is the primary insect pest attacking sweet maize in Florida. Larval stages feed on all parts of the growing plant causing crop yield losses up to 20% or more in the United States. In other parts of the world, it causes maize yield losses from 17-72%. Consistent pesticide use facilitated resistance in the species; therefore, there is an urgent need for alternative effective pest management strategies. Augmentative biological control provides the opportunity to strategically release biocontrol agents where they are absent or in small populations in open fields. This study was designed to investigate the integration of three biocontrol agents which occupied the same guild. Specific investigations targeted predatory interactions, the influence of temperature on predation, and the cost of implementing small scale production of these biocontrol agents for augmentative release. The study was conducted from fall 2017 to spring 2019 and several experiments were conducted under laboratory conditions. Podisus maculiventris (Say) (Hemiptera: Pentatomidae), Euthyrhynchus floridanus (L.) (Hemiptera: Pentatomidae) and Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae) are known natural enemies of lepidopteran pests. These three biocontrol agents could potentially be used for augmentative control of fall armyworms, depending on their interactions as expressed in the same guild. The costs of producing these three biocontrol agents for a small farm were calculated to provide small farmers with an alternate method of producing these biocontrol agents. The results indicated a significant difference in competition between the two predaceous stink bugs, with E. floridanus apparently being an intraguild predator of P. maculiventris. Also, earlier nymphal instars of both P. maculiventris and E. floridanus were less likely to be preyed on by adults of either species. However, there were no significant differences in predation rates by either predator. The study concluded that integrating these three biological control agents is possible; however, further study is needed to confirm this finding under open field conditions. Results from this research contribute to knowledge on the use of augmentative control in the integrated pest management of the fall armyworm.
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| Subject
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Entomology
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