Abstract
ABSTRACT: Fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) is one of the main pests in maize crop with developing resistance to chemical products and Bt technology. Therefore, alternative control methods such as essential oils are important steps in the implementation management strategies for this pest. This study aimed to evaluate the efficiency of essential oils (EOs) of Corymbia citriodora, Myrciaria dubia (Myrtaceae), Lippia microphylla (Verbenaceae) and Piper umbelattum (Piperaceae) in controlling S. frugiperda. The OEs were extracted and mortality tests were conducted with topic and volatile applications, in 30 second-instar caterpillars originated from insect rearing and artificial diet. As a control, we conducted tests with distilled water and acetone. EOs that provided mortality rates above 80% were submitted to chemical analysis for constituent identification. The efficient EOs were only those of C. citriodora and L. microphylla. For EO of C. citriodora, the LD80 was 7.06 ± 0.73 mg.g-1 in topical application and 5.85 ± 0.75 µL via volatile application. On the other hand, for EO of L. microphylla, DL80 was 9.95 ± 1.25 mg.g-1 in topical application and 18.56 ± 3.55 µL via volatile application. Chemical analysis showed that the main constituents were citronella for the EO of C. citriodora and (E)-caryophyllene and (E)-nerolidol to the EO of L. microphylla. EOs of C. citriodora and L. microphylla are promising for controlling S. frugiperda, with emphasis on the volatile effect of C. citriodora oil.
Highlights
Fall armyworm, Spodoptera frugiperda (Smith, 1797) (Lepdoptera: Noctuidae) is a polyphagous insect, one of the most important pests for maize in South America (POGUE, 2002)
In Roraima, S. frugiperda is a pest for crops of rice (SAKAZAKI et al, 2008) and maize (MARSARO JUNIOR; SILVA JUNIOR, 2010; MASTRANGELO et al, 2014)
Despite the prominence given to S. frugiperda as maize pest, this species has been reported in other crops such as sorghum, Sorghumbicolor (L.) Moench, pasture Panicum maximum Jacq
Summary
Spodoptera frugiperda (Smith, 1797) (Lepdoptera: Noctuidae) is a polyphagous insect, one of the most important pests for maize in South America (POGUE, 2002). In Roraima, S. frugiperda is a pest for crops of rice (SAKAZAKI et al, 2008) and maize (MARSARO JUNIOR; SILVA JUNIOR, 2010; MASTRANGELO et al, 2014). These crops represent 36% of the planted area and 58% of the agricultural production in the state on annual plantings (CONAB, 2017). Despite the prominence given to S. frugiperda as maize pest, this species has been reported in other crops such as sorghum, Sorghumbicolor (L.) Moench, pasture Panicum maximum Jacq. Sugarcane, Saccharum officinarum L. (Poaceae) cotton, Gossypium herbaceum L. (Malvaceae) and soy, Glycine max (L.) Merril (Fabaceae) (BOREGAS et al, 2013)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
