Mass Rearing Optimization of Cotesia vestalis (Hymenoptera: Braconidae) Based on the Host and Parasitoid Densities

Rezaei, Mehran; Karimzadeh, Javad; Shakarami, Jahanshir

doi:10.1007/s13744-019-00746-w

Cited by 8 publications

(10 citation statements)

References 40 publications

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“…Mass rearing of biological control agents requires regular production followed by the ability to store the parasitoids produced, especially in the case of augmentative releases (van Lenteren et al, 2003;Wei et al, 2003;Rezaei et al, 2020). The present study showed that adult emergence, fecundity, adult longevity, oviposition period, and several population parameters of A. matricariae were all negatively affected by extended cold storage.…”

Section: Discussionmentioning

confidence: 62%

“…A female-biased sex ratio is also considered an important quality-control factor in augmentative biocontrol programs (Wei et al, 2003;Rezaei et al, 2020). Sex ratios may be distorted by cold storage and this distortion can arise from differential mortality between the sexes when immature stages are exposed to low temperatures (Rathee & Ram, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Mass rearing of biological control agents is an important tool for biological control programs, particularly for species used in augmentative releases (van Lenteren et al, 2003;Rezaei et al, 2020). Storage at low temperatures is an important method for increasing the shelf life of parasitoids and predators to provide a steady and sufficient supply of insects for biocontrol programs.…”

Section: Introductionmentioning

confidence: 99%

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Effects of cold storage on life‐history traits ofAphidius matricariae

Rezaei

Talebi

Fathipour

et al. 2020

Entomologia Exp Applicata

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Aphidius matricariae Haliday (Hymenoptera: Braconidae) is a polyphagous solitary endoparasitoid, attacking more than 40 species of aphids. This parasitoid is an important commercial product of many companies that produce biological control agents. Storage at low temperature increases the shelf life of many biocontrol agents, allowing companies to provide a steady and sufficient supply of insects for biocontrol programs. In the current study, the effects of cold storage of 1‐day‐old host mummies with A. matricariae for various time periods (5, 10, 15, 20, and 30 days) at 5 °C on the parasitoid’s key life‐history traits were investigated. Parameters assessed after storage included adult emergence rate, offspring sex ratio, adult longevity, oviposition period, fecundity, and life‐table parameters (R0, r, λ, T, and DT). Our results showed that the mummies of A. matricariae could be stored at 5 °C for 5 days without loss of quality and for 10–15 days with minimal reduction in quality (e.g., some reduction in adult longevity and R0). If parasitoids were stored for >15 days, quality was more strongly affected. In conclusion, A. matricariae pupae could be stored at 5 °C for up to 15 days without significant negative post‐storage effects on fitness of the parasitoid. These results could be used to improve the planning of mass rearing and mass release of A. matricariae in augmentative biological control programs.

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Section: Discussionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of cold storage on life‐history traits ofAphidius matricariae

Rezaei

Talebi

Fathipour

et al. 2020

Entomologia Exp Applicata

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“…The Plutella xylostella larvae were removed daily and further fed, and the date of cocoon formation was recorded separately. Referring to the previous method, 33,37 the developmental periods of the egg and larval stages were collectively referred to as the egg‐larva stage, and the pupal stage was computed from cocoon formation to wasp emergence.…”

Section: Methodsmentioning

confidence: 99%

“…Plutella xylostella (commonly known as diamondback moth) is a notorious pest of cruciferous crops worldwide due to its rapid development of resistance to agrochemicals, strong migratory ability, and high fecundity 28–30 . Cotesia vestalis is a dominant, solitary, koinobiont, larval‐prepupal endoparasitoid of the diamondback moth and an important biocontrol agent of Plutella xylostella 14,31–33 . Cotesia vestalis larvae feed on their host, but the adults cannot use Plutella xylostella as a food source and are adapted to feed on supplementary food after emergence and can only survive for a few days without food intake 34,35 .…”

Section: Introductionmentioning

confidence: 99%

Identification of floral volatiles from Fagopyrum esculentum that attract Cotesia vestalis with potentially better biocontrol efficacy against Plutella xylostella

You,

Niu

2023

Pest Management Science

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BACKGROUNDNectar plants provide extra nourishment for parasitoids, which can utilize floral volatiles to locate nectar‐rich flowers. A promising strategy is to screen potential floral species based on the wasps' olfactory preferences for nectar sources, and to ensure their suitability for both natural enemies and targeted pests. Cotesia vestalis (Haliday) is a dominant parasitoid of the oligophagous pest Plutella xylostella, which poses a significant threat to cruciferous vegetables globally. However, the chemical cues in plant–parasitoid complexes mediating Cotesia vestalis to locate nectar food resources and the positive effect of nectar plants on the Cotesia vestalis population are poorly understood.RESULTSThe results showed that Fagopyrum esculentum was the most attractive plant that attracted Cotesia vestalis, not Plutella xylostella in 44 flowering plants from 19 families. 1,2‐Diethyl benzene and 1,4‐diethyl benzene, identified from the floral volatiles from F. esculentum in full bloom, were found to elicit dose‐dependent electrophysiological responses and attract Cotesia vestalis adults, demonstrating their potential as semiochemicals. Moreover, the age‐stage, two‐sex life table revealed that feeding on nectar food increased the efficacy of Cotesia vestalis adults against Plutella xylostella.CONCLUSIONIn summary, the findings provide insights into the chemical ecology of plant–parasitoid complexes and support the potential use of F. esculentum as insectary plants in habitat manipulation against Plutella xylostella by supplying natural nectar food for the Cotesia vestalis population. Our results suggest an attract and reward strategy based on an attractant for Cotesia vestalis to control Plutella xylostella, or the development of volatile‐based artificial food for Cotesia vestalis. © 2023 Society of Chemical Industry.

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