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Taro Colocasia esculenta as an alternative host plant for rearing cassava mealybug (Hemiptera: Pseudococcidae) and its parasitoid Anagyrus lopezi (Hymenoptera: Encyrtidae)

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Abstract

So far, Phenacoccis manihoti (Hemiptera: Pseudococcidae) has been reared mainly with cassava. To explore alternative host plant for rearing of P. manihoti and its parasitoid Anagyrus lopezi De Santis (Hymenoptera: Encyrtidae), we examined suitability of taro Colocasia esculenta (L.) (Alismatales: Araceae) for rearing them in the laboratory, which was compared with that of cassava seedling. Either 50 newly hatched mealybug nymphs or parasitized third-instar mealybugs were reared on taro or cassava seedlings to examine immature development, fecundity and longevity of adults. Nearly 90% of P. manihoti reared on taro successfully developed to adults and they produced 230 eggs on average in their lifetime, while insects reared on cassava showed 95% survival and 250 eggs of lifetime fecundity. For A. lopezi, immature survival was 86% and they laid 140 eggs on average on taro, while it was 88% and 140 eggs on cassava. The results suggested that taro can be used for rearing of P. manihoti and its parasitoid A. lopezi.

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Acknowledgements

This research was supported by Science and Technology Research Partnership for Sustainable Development (SATREPS) in collaboration between Japan Science and Technology Agency (JST, JPMJSA1508) and Japan International Cooperation Agency (JICA) and by KAKENHI Grant Number 19KK0153.

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Author notes

  1. Layheng Sam

    Present address: University of Battambang, Battambang, Cambodia

Authors and Affiliations

  1. Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan

    Dat Nguyen Tuan, Layheng Sam & Chi Zhang

  2. Faculty of Biotechnology, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam

    Chau Nguyen Ngoc Bao

  3. Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan

    Shun-ichiro Takano & Keiji Takasu

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  1. Dat Nguyen Tuan
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  2. Layheng Sam
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  3. Chi Zhang
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  4. Chau Nguyen Ngoc Bao
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  5. Shun-ichiro Takano
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Correspondence to Shun-ichiro Takano.

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Nguyen Tuan, D., Sam, L., Zhang, C. et al. Taro Colocasia esculenta as an alternative host plant for rearing cassava mealybug (Hemiptera: Pseudococcidae) and its parasitoid Anagyrus lopezi (Hymenoptera: Encyrtidae). Appl Entomol Zool 55, 355–359 (2020). https://doi.org/10.1007/s13355-020-00690-x

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