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- Title
Effect of Azadirachta indica (Sapindales: Meliaceae) Oil on Spodoptera frugiperda (Lepidoptera: Noctuidae) Larvae and Adults.
- Authors
Duarte, Jucelio Peter; Redaelli, Luiza Rodrigues; Jahnke, Simone Mundstock; Trapp, Samuel
- Abstract
Azadirachta indica A. Juss. (Meliaceae) is used to control insects due to its compounds that have insecticidal, repellent, and antifeedant properties. These effects also may cause sublethal impacts on insects that reduce populations of target species. Such species can have economic importance, like Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), which feeds on various plant species. Thus, the objective of this study was to evaluate the larval mortality, lethal concentration, and sublethal effects on larvae, pupae, and adults of S. frugiperda after larvae were fed on an artificial diet containing A. indica oil at different concentrations. The oil was incorporated into the artificial diet at the concentrations of 5,000, 10,000, and 15,000 ppm, plus a control group. Four replicates of 35 second instar caterpillars were made for each treatment, and observed daily until pupation and emergence. The larval survival, duration of the larval and pupal periods, pupal weight and viability, wing length, and deformation of adults were evaluated. Longevity, fertility, and fecundity also were recorded for each pairing (mating arrangement) of males and females that developed on either a diet without oil and propanone, with propanone only, and with both oil and propanone. Azadirachta indica oil in the diet reduced survival and prolonged duration of the larval and pupal periods. Pupae in the groups that contained oil weighed less, and the adults had smaller wing length than in the control group. There was no influence on pupal viability, but the number of deformed adults increased. The oil reduced fecundity and longevity, but it did not alter fertility. These results suggest that the oil may reduce the probability of this insect remaining in the environment due to its ability to decrease the offspring and longevity of this species.
- Subjects
FALL armyworm; NOCTUIDAE; NEEM; LEPIDOPTERA; MELIACEAE
- Publication
Florida Entomologist (Florida Entomological Society), 2019, Vol 102, Issue 2, p408
- ISSN
0015-4040
- Publication type
Article
- DOI
10.1653/024.102.0218