Development ofMicroplitis similis(Hymenoptera: Braconidae) on Two Candidate Host Species,Spodoptera lituraandSpodoptera exigua(Lepidoptera: Noctuidae)

Li, Shun-Ji; Huang, Ju-Ping; Chang, Yangyang; Quan, Si-Yuan; Yi, Wu; Chen, Zi-Shu; Liu, Shuangqing; Cheng, Xin; Huang, Guo‐Hua

doi:10.1653/024.098.0250

Cited by 20 publications

(20 citation statements)

References 39 publications

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“…Li et al. () reported parasitism rate of 68.05% from a single female of Microplitis similis Lyle (Hymenoptera: Braconidae), a solitary endoparasitoid when exposed to thirty newly moulted 3rd instar of S. exigua . When a cohort of 20 S. exigua larvae of different instars were exposed to a single female of Meteorus pulchricornis (Wesmael) (Hymenoptera: Braconidae), a parasitism rate ranging from 20% to 70% was reported according to the larval instar stage (Liu & Li, ).…”

Section: Discussionmentioning

confidence: 99%

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Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

Agbodzavu

Gikungu

Lagat

et al. 2018

J Applied Entomology

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The beet armyworm Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) is a polyphagous insect that is distributed worldwide and was recently reported as an important pest on African indigenous vegetables. Cotesia icipe Fernandez‐Triana & Fiaboe (Hymenoptera: Braconidae) is a recently described parasitoid, reported from various Afrotropical countries. This work investigated the performance of C. icipe on S. exigua infesting Amaranthus dubius Mart. ex Thell. under laboratory conditions. Cotesia icipe was aggressive on the host and successfully oviposited on S. exigua with 70% of parasitoid females ovipositing after 2 hr of exposure. Parasitoid densities significantly affected the parasitism rate and the nonreproductive larval mortality. Parasitism rate was 9.7 ± 0.8% and 59.5 ± 3.1% for a single and cohort of five females released, respectively, when offered 50 host larvae. The cohort female release resulted in significantly higher larval nonreproductive mortality than the single release. However, there was no significant difference between parasitoid release densities in regard to pupal nonreproductive mortality. The larval and pupal mortalities in the presence of C. icipe were significantly higher than the natural mortalities at both parasitoid release densities. The parasitoid sex ratio was female‐biased for the cohort females but balanced when a single female was released. The hind tibia and forewing lengths were not affected by the density of female parasitoids but there were variations according to sex. The implication of these findings on the potential use of C. icipe for biological control of S. exigua in amaranth production systems is discussed.

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Section: Discussionmentioning

confidence: 99%

“…It was also relatively lower compared to the parasitism rates reported for other parasitoids on S. exigua. Li et al (2015) reported parasitism rate of 68.05% from a single female of Microplitis similis Lyle (Hymenoptera:…”

Section: Discussionmentioning

confidence: 99%

Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

Agbodzavu

Gikungu

Lagat

et al. 2018

J Applied Entomology

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“…Spodopera litura larvae were reared on pinto bean-based diets until pre-pupation at 30 ± 1 ℃, 60 ± 5 % RH, with a photoperiod of 14: 10 (L: D) h (Burton 1970;Li et al 2015). First to fifth S. litura instars were used for these experiments.…”

Section: Study Insectsmentioning

confidence: 99%

“…The parasitoids were reared on S. litura larvae with a 40 % honey solution as food at 30 ℃ (Li et al 2015). For this experiment, M. similis adults were cultured with 30 % honey solution at 30 ± 1 ℃, 60 ± 5 % RH, with a photoperiod of 14: 10 (L: D).…”

Section: Study Insectsmentioning

confidence: 99%

“…All experiments were conducted under the same environmental conditions described above. The species identification of M. similis was referenced to Li et al (2015). Molecular identification based on the barcoding co1 sequence following Huang's methods (Huang et al 2011) was performed based on the co1 sequence of M. similis (GenBank Access Number: KX077544) and the Microplitis co1 sequences in NCBI, the phylogenetic relationship of M. similis is shown in supplementary figures.…”

Section: Study Insectsmentioning

confidence: 99%

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A Place to Grow? Host Choice and Larval Performance of Microplitis similis (Hymenoptera: Braconidae) in the Host Spodoptera litura (Lepidoptera: Noctuidae)

Chen

Hopkins

Zhao

et al. 2017

Environmental Entomology

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Host selection is a key stage in the lifecycle of parasitoids, and is critical to both their function in control and to the maintenance of their population. The solitary endoparasitoid Microplitis similis (Hymenoptera: Braconidae), is a potential biological control agent of Spodoptera litura larvae (Lepidoptera: Noctuidae). In this study, we examined the preference M. similis exhibits for different instars of the host, host instar effects on parasitoid development and the weight gain and food consumption of different instars of parasitized larvae. In no-choice tests, parasitization rates were highest in second and early third instar larvae, and no fourth or fifth instar hosts were parasitized. When provided with a choice of first to late third instars host larvae, M. similis preferred to parasitize early third instar host larvae (41 %) with a selection coefficient of 0.37. All morphometric features of wasp offspring increased with increasing age of the host at parasitization. A lower proportion of females emerged from first instar larvae than any other instar. Parasitized S. litura larvae showed a pronounced reduction in food consumption and weight gain. Microplitis similis may have the potential to significantly suppress population growth and the damage caused by S. litura.

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Repellence or attraction: secondary metabolites in pepper mediate attraction and defense against Spodoptera litura

Yuan

Zhao²,

et al. 2022

Pest Management Science

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BACKGROUND Resistance to insect pests is an important self‐defense characteristic of pepper plants. However, the resistance of different pepper cultivars to Spodoptera litura larvae, one of the main insect pest species on pepper, is not well understood. RESULTS Among seven pepper cultivars evaluated, cayenne pepper ‘FXBX’ showed the highest repellency to third instar S. litura larvae, Chao tian chili pepper ‘BLTY2’ showed the lowest repellency. Plant volatiles (1‐hexene, hexanal, β‐ionone, (E,E)‐2,6‐nonadienal, and methyl salicylate) affected host selection by S. litura. Among these, 1‐hexene, hexanal, and β‐ionone at concentrations naturally‐released by pepper leaves were found to repel S. litura. Interestingly, S. litura larvae fed on the larva‐attracting pepper cultivar, (BLTY2) had an extended developmental period, which was about 13 days longer than larvae fed on FXBX. Besides, the survival rate of larvae fed on BLTY2 was 22.5 ± 0.0%, indicating that the leaves of BLTY2 can kill S. litura larvae. Correlation analysis showed that larval survival rate, emergence rate, female adult longevity, and pupal weight were positively correlated with the vitamin C, amino acids, protein, cellulose, and soluble sugar contents, but were negatively correlated with wax and flavonoids contents. CONCLUSION We identified two different modes of direct defense exhibited by pepper cultivars against S. litura. One involves the release of repellent volatiles to avoid been fed on (FXBX cultivar). The other involves the inhibition of the growth and development or the direct killing of S. litura larvae which feeds on it (BLTY2 cultivar). © 2022 Society of Chemical Industry.

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Development ofMicroplitis similis(Hymenoptera: Braconidae) on Two Candidate Host Species,Spodoptera lituraandSpodoptera exigua(Lepidoptera: Noctuidae)

Cited by 20 publications

References 39 publications

Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

A Place to Grow? Host Choice and Larval Performance of Microplitis similis (Hymenoptera: Braconidae) in the Host Spodoptera litura (Lepidoptera: Noctuidae)

Repellence or attraction: secondary metabolites in pepper mediate attraction and defense against Spodoptera litura

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