Effects of Cold Storage on Host Antheraea pernyi Egg Quality for the Egg Parasitoid Anastatus fulloi Sheng and Wang

Zhao, Can; Zhang, Baoxin; Liu, Zixin; Zhang, Huiyun; Li, Dunsong

doi:10.3390/insects12121057

Cited by 3 publications

(4 citation statements)

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“…Infertile eggs are collected from emerged female moths in the following year and can be stored at −10 °C for up to 6 months for mass rearing of Anastatus species 18 . Recent study showed that no significant differences in emergence rate and the proportion of Anastatus fulloi females when reared on Antheraea pernyi eggs stored at −5 °C and −18 °C for 6 months compared to fresh eggs, whereas the parasitism rate was reduced after 6 months cold storage and still reach over 90% on average 36 . Nonetheless, cold storage of Antheraea pernyi eggs should not exceed 6 months to have limited negative effects to maintain higher level productivity in mass rearing of Anastatus species 18,36 .…”

Section: Discussionmentioning

confidence: 99%

“… 18 Recent study showed that no significant differences in emergence rate and the proportion of Anastatus fulloi females when reared on Antheraea pernyi eggs stored at −5 °C and −18 °C for 6 months compared to fresh eggs, whereas the parasitism rate was reduced after 6 months cold storage and still reach over 90% on average. 36 Nonetheless, cold storage of Antheraea pernyi eggs should not exceed 6 months to have limited negative effects to maintain higher level productivity in mass rearing of Anastatus species. 18 , 36 Moreover, manually extracted, infertile and washed Antheraea pernyi eggs are most suitable for mass rearing of Anastatus species, including Anastatus japonicus .…”

Section: Discussionmentioning

confidence: 99%

“… 36 Nonetheless, cold storage of Antheraea pernyi eggs should not exceed 6 months to have limited negative effects to maintain higher level productivity in mass rearing of Anastatus species. 18 , 36 Moreover, manually extracted, infertile and washed Antheraea pernyi eggs are most suitable for mass rearing of Anastatus species, including Anastatus japonicus . 37 Our present study showed that Anastatus japonicus could successfully develop on Antheraea pernyi .…”

Section: Discussionmentioning

confidence: 99%

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Reproductive attributes and functional response ofAnastatus japonicuson eggs ofAntheraea pernyi, a factitious host

Zhang

Ali

et al. 2022

Pest Management Science

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BACKGROUND Anastatus japonicus Ashmead (Hymenoptera: Eupelmidae) is a solitary egg endoparasitoid that has been studied for inundative biological control of Halyomorpha halys Stål (Hemiptera: Pentatomidae) in China. In this study, we assessed the reproductive attributes and functional response of Anastatus japonicus on a factitious host, Antheraea pernyi (Guérin‐Méneville) (Lepidoptera: Anthelidae) at 25 ± 1 °C, 70 ± 5% relative humidity and 16 h:8 h light/dark photoperiod. RESULTS The mean lifetime fecundity of Anastatus japonicus females was 404.3 progeny produced over an average oviposition period of 42.3 days. The sex ratio of adult progeny was slightly male biased (51.2%), whereas more female progeny were produced before day 20 of a female's life. Single 1‐day‐old mated Anastatus japonicus females exhibited a type II functional response to increasing host densities (1–50 eggs), with an inverse host density‐dependent pattern of percent parasitism. The upper limit to the daily attack rate was estimated as 7.6 Antheraea pernyi eggs. Furthermore, mutual interference among Anastatus japonicus females occurred when increasing densities of parasitoids (1, 2, 4, 8, 16) were exposed to 30 host eggs. CONCLUSION Laboratory functional response result revealed that individual Anastatus japonicus might be unable to respond effectively to increasing host density in the field, which could be compensated by releasing larger numbers of wasps. Strong mutual interference among foraging Anastatus japonicus females should be considered in any future inundative biological control programs for the sustainable management of Halyomorpha halys or other host insect pests. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Reproductive attributes and functional response ofAnastatus japonicuson eggs ofAntheraea pernyi, a factitious host

Zhang

Ali

et al. 2022

Pest Management Science

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“…However, this study did not examine the number of L. delicatula nymphs that emerged from freshly collected L. delicatula egg masses, those stored at 5°C, or what nymph emergence rates would be if eggs were stored at temperatures below 5°C (e.g., -40°C) for varying time periods. Previous studies have shown that parasitoid species in the genus Anastatus were able to parasitize frozen hemipteran and lepidopteran eggs ( 19 , 20 ). However, it is unknown if fulgorid egg masses (e.g., L. delicatula ) would be suitable for parasitism by A. orientalis after freezing.…”

Section: Introductionmentioning

confidence: 99%

Effects of Freezing Lycorma delicatula Egg Masses on Nymph Emergence and Parasitization by Anastatus orientalis

Gómez-Marco

Hoddle²

2022

Front. Insect Sci.

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Lycorma delicatula (White) (Hemiptera: Fulgoridae), native to China, was first detected in Pennsylvania, U.S. in 2014. This polyphagous pest can feed on over 70 plant species including agricultural crops, like grapes, that have high economic value. Anastatus orientalis Yang and Choi (Hymenoptera: Eupelmidae) is an egg parasitoid associated with L. delicatula egg masses in China that is being evaluated for possible introduction into the U.S. for classical biological control of L. delicatula. In support of this program, the suitability of frozen L. delicatula eggs for parasitization by A. orientalis was evaluated in a quarantine laboratory. Host egg masses held for four different cold storage periods (5°C for <1, 4, 8 and 11 months) were frozen at -40°C for 1 hour or 24 hours and exposed to female A. orientalis for parasitization for seven days. Following this experimental exposure period, rates of L. delicatula nymph emergence and A. orientalis parasitism were assessed for each of the eight different cold storage treatments. Host acceptance and suitability of frozen L. delicatula eggs by A. orientalis was assessed in terms of percentage parasitism, offspring sex ratio, and hind tibia length of emerged parasitoids. Results indicated that L. delicatula nymphs failed to emerge from eggs that were exposed to -40°C for 1 hour and 24 hours and A. orientalis could successfully parasitize L. delicatula eggs regardless of cold storage and freezing treatment. These results add a new tool for long term maintenance of L. delicatula egg masses and rearing methods for egg parasitoids of this pest. Additionally, it may be possible to field deploy sentinel eggs of L. delicatula frozen at -40°C to survey for resident natural enemy species capable of parasitizing eggs of this pest in advance of anticipated L. delicatula invasions into new areas.

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Effect of individual quick freezing treatment and cold storage on the host egg (Lepidoptera: Saturniidae) quality for the production of the parasitoid Anastatus japonicus Ashmead (Hymenoptera: Eupelmidae)

Wu,

Lee,

Chuang

et al. 2024

Egypt J Biol Pest Control

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Background The augmentative release of the parasitoid species Anastatus japonicus Ashmead (Hymenoptera: Eupelmidae) is essential for managing the recent invasion of litchi stink bugs (Tessaratoma papillosa (Drury)) (Hemiptera: Tessaratomidae) in Taiwan. The mass release program in the spring targets this univoltine pest’s reproduction cycle. Low-temperature storage for the host eggs and parasitoids is required to maximize the production for the annual release program. This study aimed to enhance the shelf life of Samia cynthia (Lepidoptera: Saturniidae) eggs using the combination of refrigeration and individual quick freezing (IQF) as a storage treatment. Storage of A. japonicus in the IQF-treated S. cynthia eggs was evaluated to determine the optimal production process during the short preparation window before the release. Results The influences of cold storage and IQF treatment on the host eggs were evaluated for different storage durations. The host quality was determined according to the emergence rate and female ratio of A. japonicus. The study’s results demonstrated that the host quality of S. cynthia eggs did not change significantly compared to the control group after 28 d of refrigeration at 7 °C. IQF treatment extended S. cyathia’s shelf life to 5 months without significantly affecting the host quality. Applying IQF at different developmental stages of the host eggs affected the parasitism rates of A. japonicus. Significantly higher emergence rates of A. japonicus were recorded in the eggs treated during the initial development (D0 to D2). However, storing parasitoids in the IQF-treated eggs under the current storage condition for one month at 12 °C significantly impacted the parasitoid’s emergence rate. Conclusions The results of this study highlight the potential benefits of the individual quick freezing technique. This technique didn’t alter the egg quality of S. cynthia, a crucial factor for the mass production of A. japonicus. The IQF treatment extends the shelf life of the host eggs to 5 months when stored at − 20 °C, a significant improvement compared to the 4-week shelf life without IQF treatment. This technology offers a promising and efficient approach for the mass production of A. japonicus and supports field releases. The treatment allowed for the stockpiling of host eggs during the off-season, which can help expedite the mass production of A. japonicus to fit an eight-week production window.

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Effects of Cold Storage on Host Antheraea pernyi Egg Quality for the Egg Parasitoid Anastatus fulloi Sheng and Wang

Cited by 3 publications

References 26 publications

Reproductive attributes and functional response ofAnastatus japonicuson eggs ofAntheraea pernyi, a factitious host

Reproductive attributes and functional response ofAnastatus japonicuson eggs ofAntheraea pernyi, a factitious host

Effects of Freezing Lycorma delicatula Egg Masses on Nymph Emergence and Parasitization by Anastatus orientalis

Effect of individual quick freezing treatment and cold storage on the host egg (Lepidoptera: Saturniidae) quality for the production of the parasitoid Anastatus japonicus Ashmead (Hymenoptera: Eupelmidae)

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