Oviposition deterrent effect of<i>Spodoptera littoralis</i>(Boisd.) larval frass to adult females of two major noctuid insect pests

Hashem, Mohamed Y.; Ahmed, A. A. I.; Mohamed, S. M.; Sewify, G. H.; Khalil, S.H. Shimaa

doi:10.1080/03235408.2012.755047

Cited by 5 publications

(12 citation statements)

References 13 publications

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“…The presence of flavonoids in active fraction 5 and pectolinaringenin exhibited maximum oviposition deterrent activity against H. armigera. The present finding agreed with the findings of Hashem et al (2013) who studied the frass extract of S. littoralis fed with castor leaf against female adults of S. littoralis and A. ipsilon for oviposition deterrent activity; they observed that the presence of low amount of phenolics/ flavonoids effectively prevented the egg laying.…”

Section: Oviposition Deterrent Activitysupporting

confidence: 92%

Evaluation of fractions and 5,7-dihydroxy-4',6-dimethoxy-flavone fromClerodendrum phlomidis Linn. F. against Helicoverpa armigera Hub.

Duraipandiyan

Muthu²,

Baskar³

et al. 2015

Braz. arch. biol. technol.

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Section: Oviposition Deterrent Activitysupporting

confidence: 92%

Evaluation of fractions and 5,7-dihydroxy-4',6-dimethoxy-flavone fromClerodendrum phlomidis Linn. F. against Helicoverpa armigera Hub.

Duraipandiyan

Muthu²,

Baskar³

et al. 2015

Braz. arch. biol. technol.

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“…We were able to trace the production of guaiacol to culturable bacteria in frass of larvae fed on cotton and cabbage leaves. Frass-derived compounds such as acetoin, guaiacol and 1-octanol (Klein et al 1990) were detected in headspace of isolated bacterial colonies and confirmed that larval frass contains microbial communities that emit VOCs, contributing to fecal volatile emissions.…”

Section: Discussionmentioning

confidence: 62%

“…Moreover, we determined the compound as a larval attractant in a behavioral assay. Considering the avoidance of frass volatiles by Spodoptera females (Klein et al 1990), our findings might facilitate development of a 'push-pull-and-kill' strategy that repels female moths from oviposition and attracts larvae to a fatal bait.…”

Section: Introductionmentioning

confidence: 96%

“…Volatiles emitted from conspecific larval frass that typically is found on the ground of infested plants might help migrating larvae to identify suitable host plants. It was shown that volatiles emitted from frass are perceived by S. littoralis female moths, deterring them from oviposition (Klein et al 1990), and considering the overlap in larval and adult olfactory systems (Poivet et al 2013;Walker et al 2016), it is plausible that frass volatiles might also influence larval behavior. Behavioral responses to insect frass have been shown in other insect species (Dillon et al 2000;Axelsson et al 2017;Molnár et al 2017;Zhang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Larval response to frass and guaiacol: detection of an attractant produced by bacteria from Spodoptera littoralis frass

et al. 2021

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Larval frass in herbivorous lepidopterans is mainly composed of plant-derived material and microbes from the gut. Despite the fact that frass from conspecific larvae repels female moths in Spodoptera littoralis from oviposition, the role of frass volatiles on larval foraging behavior is largely unknown. Here, we show that larvae of S. littoralis walk upwind to larval frass volatiles in a wind tunnel assay. We identified the frass volatile guaiacol (2-methoxyphenol) as key ligand for the S. littoralis odorant receptor (OR) SlitOr59 which we expressed heterologously. We isolated guaiacol-producing bacteria identified as Serratia marcescens from frass of larvae that were fed on cotton, and Enterobacter cloacae, E. ludwigii and Klebsiella sp. from frass derived from cabbage-fed larvae. In addition to guaiacol, we also identified volatiles acetoin, 3-methyl-1-butanol and dimethyl disulfide, in large proportions in headspace collections from the bacteria. A Y-tube olfactometer assay showed that fourth instar S. littoralis larvae are attracted to guaiacol. Moreover, cotton leaves treated with the insecticide Spinosad and guaiacol were highly attractive to the larvae. Our results provide a basis for management of the pest by directly targeting larvae, based on an attract-and-kill strategy. Further studies are needed to test the application of guaiacol for semiochemical-based pest management of Spodoptera pest species.

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“…For instance, Averill & Prokopy (1987) showed that female Rhagoletis pomonella Walsh (Diptera: Tephritidae) marks its oviposition site with an epideictic pheromone that deters conspecific females from laying eggs, thus reducing intraspecific competition at the larval stage. The frass of several Lepidoptera species was also found to act as an oviposition deterrent (Jones & Finch, 1987; Hashem et al, 2013; Molnár et al, 2017). Mated females may also detect herbivory-induced changes in the physical and chemical characteristics of attacked plants, and consequently avoid laying eggs on less suitable plants.…”

Section: Introductionmentioning

confidence: 99%

Host-mediated, cross-generational intraspecific competition in a herbivore species

Castagneyrol

Halder

Kadiri

et al. 2020

Preprint

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Conspecific insect herbivores co-occurring on the same host plant interact both directly through interference competition and indirectly through exploitative competition, plant-mediated and enemy-mediated interactions. The situation is however less clear when interactions among conspecific insect herbivores are separated in time over the course of the same growing season such as in multivoltine herbivore species. We hypothesized that early season herbivory would result in reduced egg deposition and lower next generation herbivore performance on previously attacked plants. We experimentally tested this hypothesis in a choice experiment with box tree moth females, Cydalima perspectalis Walker (Lepidoptera: Crambidae), offered box trees, Buxus sempervirens L. (Buxaceae), that had been, or not, previously defoliated by BTM larvae earlier in the season. We further compared the performance of next generation larvae on previously damaged vs undamaged plants. Prior herbivory had no effect on egg laying behaviour, but next generation larval weight was significantly lower in previously damaged plants. There was a negative correlation between the number of egg clutches per plant and larval performance. Altogether, our findings reveal that early season herbivory reduces the performance of conspecific individuals on the same host plant later in the plant growing season, and that this time-lagged intraspecific competition results from a mismatch between female oviposition preference and the performance of its offspring.

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Oviposition deterrent effect ofSpodoptera littoralis(Boisd.) larval frass to adult females of two major noctuid insect pests

Cited by 5 publications

References 13 publications

Evaluation of fractions and 5,7-dihydroxy-4',6-dimethoxy-flavone fromClerodendrum phlomidis Linn. F. against Helicoverpa armigera Hub.

Evaluation of fractions and 5,7-dihydroxy-4',6-dimethoxy-flavone fromClerodendrum phlomidis Linn. F. against Helicoverpa armigera Hub.

Larval response to frass and guaiacol: detection of an attractant produced by bacteria from Spodoptera littoralis frass

Host-mediated, cross-generational intraspecific competition in a herbivore species

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