Monitoring of four major lepidopteran pests in Korean cornfields and management of Helicoverpa armigera
Lepidopterans such as Helicoverpa armigera are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We monitored four major lepidopteran pests in major corn growing areas of Korea by employing sex pheromone traps from 2012 to 2015 to understand p...
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          | Published in | Entomological research Vol. 48; no. 4; pp. 308 - 316 | 
|---|---|
| Main Authors | , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
        Hoboken
          Wiley Subscription Services, Inc
    
        01.07.2018
     한국곤충학회  | 
| Subjects | |
| Online Access | Get full text | 
| ISSN | 1738-2297 1748-5967 1748-5967  | 
| DOI | 10.1111/1748-5967.12310 | 
Cover
| Abstract | Lepidopterans such as
Helicoverpa armigera
are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We monitored four major lepidopteran pests in major corn growing areas of Korea by employing sex pheromone traps from 2012 to 2015 to understand population dynamics.
H. armigera
,
Ostrinia furnacalis
,
Spodoptera litura
,
Spodoptera exigua
and
Mythimna separata
were collected from April to October. Among these species,
H. armigera
was found to be the main pest based on crop damage intensity (80–90% of the total damage).
H. armigera
was generally observed during the earing stage of corn and would migrate to other fields during September to October for overwintering. We also tested select insecticides against larvae of
H. armigera
in the laboratory. The most effective insecticide was indoxacarb, which was applied at specific times to manage
H. armigera
in cornfields. Optimal timing of spraying was estimated at about 70 days after planting (earing season) to control for
H. armigera
. Additionally, two species of parasitoid (
Therion circumflexum
and
Ophioninae sp
.) were identified from
H. armigera
. However, more extensive surveys are needed to organize a control program based on natural enemies. | 
    
|---|---|
| AbstractList | Lepidopterans such as Helicoverpa armigera are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We monitored four major lepidopteran pests in major corn growing areas of Korea by employing sex pheromone traps from 2012 to 2015 to understand population dynamics. H. armigera, Ostrinia furnacalis, Spodoptera litura, Spodoptera exigua and Mythimna separata were collected from April to October. Among these species, H. armigera was found to be the main pest based on crop damage intensity (80–90% of the total damage). H. armigera was generally observed during the earing stage of corn and would migrate to other fields during September to October for overwintering. We also tested select insecticides against larvae of H. armigera in the laboratory. The most effective insecticide was indoxacarb, which was applied at specific times to manage H. armigera in cornfields. Optimal timing of spraying was estimated at about 70 days after planting (earing season) to control for H. armigera. Additionally, two species of parasitoid (Therion circumflexum and Ophioninae sp.) were identified from H. armigera. However, more extensive surveys are needed to organize a control program based on natural enemies. Lepidopterans such as Helicoverpa armigera are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We monitored four major lepidopteran pests in major corn growing areas of Korea by employing sex pheromone traps from 2012 to 2015 to understand population dynamics. H. armigera, Ostrinia furnacalis, Spodoptera litura, Spodoptera exigua and Mythimna separata were collected from April to October. Among these species, H. armigera was found to be the main pest based on crop damage intensity (80–90% of the total damage). H. armigera was generally observed during the earing stage of corn and would migrate to other fields during September to October for overwintering. We also tested select insecticides against larvae of H. armigera in the laboratory. The most effective insecticide was indoxacarb, which was applied at specific times to manage H. armigera in cornfields. Optimal timing of spraying was estimated at about 70 days after planting (earing season) to control for H. armigera. Additionally, two species of parasitoid (Therion circumflexum and Ophioninae sp.) were identified from H. armigera. However, more extensive surveys are needed to organize a control program based on natural enemies. KCI Citation Count: 0 Lepidopterans such as Helicoverpa armigera are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We monitored four major lepidopteran pests in major corn growing areas of Korea by employing sex pheromone traps from 2012 to 2015 to understand population dynamics. H. armigera , Ostrinia furnacalis , Spodoptera litura , Spodoptera exigua and Mythimna separata were collected from April to October. Among these species, H. armigera was found to be the main pest based on crop damage intensity (80–90% of the total damage). H. armigera was generally observed during the earing stage of corn and would migrate to other fields during September to October for overwintering. We also tested select insecticides against larvae of H. armigera in the laboratory. The most effective insecticide was indoxacarb, which was applied at specific times to manage H. armigera in cornfields. Optimal timing of spraying was estimated at about 70 days after planting (earing season) to control for H. armigera . Additionally, two species of parasitoid ( Therion circumflexum and Ophioninae sp .) were identified from H. armigera . However, more extensive surveys are needed to organize a control program based on natural enemies.  | 
    
| Author | Park, Ki Jin Kim, Juil Kwon, Min Maharjanm, Rameswor  | 
    
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| Snippet | Lepidopterans such as
Helicoverpa armigera
are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We... Lepidopterans such as Helicoverpa armigera are emerging pests of corn in Korea, causing huge yield losses and deteriorating the quality of the corn crop. We...  | 
    
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| SubjectTerms | Corn crop damage Helicoverpa armigera indoxacarb Insecticides Korean Peninsula larvae Migration monitoring Mythimna separata Natural enemies Ostrinia furnacalis Overwintering Parasitoids Pests Pheromone traps planting population dynamics Sex pheromone Spodoptera exigua Spodoptera litura Spraying surveys 생물학  | 
    
| Title | Monitoring of four major lepidopteran pests in Korean cornfields and management of Helicoverpa armigera | 
    
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