Life-table study of mango leaf cutting weevil, Deporaus marginatus Pascoe (Coleoptera: Curculionidae) feeding on four mango cultivars M.H. Rashid a , Hasan F. El Taj a , Chuleui Jung b, ⁎ a Department of Entomology, Faculty of Post Graduate Studies, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh b Department of Bioresources, Graduate School, Andong National University, Andong 760-749, Republic of Korea abstract article info Article history: Received 29 August 2016 Revised 22 January 2017 Accepted 6 February 2017 Available online 08 February 2017 Mango leaf cutting weevil, Deporaus marginatus Pascoe (Coleoptera: Curculionidae) is a devastating pest of fresh- ly emerged mango foliage. The immature development, survivorship and adult reproduction of the weevil were investigated on four popular mango cultivars (Langra, Amrapali, Fazli and Ashwina) under the laboratory condi- tions and life-table parameters were estimated. The immature developmental periods ranged from 17.3 to 19.8 days with female ratio of 5.5–6.2. Ault longevity ranged 43.6 days for female and 66.2 days for males. Effects of the host plant varieties were not significant on the immature development or sex ratio, but significantly influ- enced the adult performances; longevity, reproduction and also life table parameters. Among the mango varieties tested, Ashwina variety could be the most preferable with higher population growth rate while the Langra and Fazli were the lesser suitable with longer doubling time or lower reproduction. Further study could pursue the nutritional and antibiotic mechanisms which could be responsible for the different performance of the herbivore insect on the mango plants. © 2017 Published by Elsevier B.V. on behalf of Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society. Keywords: Deporaus marginatus Host Suitability Life table Mango cultivars Introduction The king of the oriental fruits, mango (Mangifera indica L.) is one of the most important, popular and delicious fruits grown throughout the tropical and subtropical regions of the world. Bangladesh is the 8th largest mango growing country along with India, Pakistan, Mexico, Brazil, Philippines, etc. (Alexander, 1989). Many new improved varie- ties were developed or introduced in the last few decades to meet up the increasing demand of mango. By starting of wide scale and intensive cultivation, the secondary pest mango leaf cutting weevil, Deporaus marginatus Pascoe (Coleoptera: Curculionidae) now turned into a major pest (NATP, 2014). The weevil has become a serious threat to the production of mango in tropical and subtropical regions of the world including Bangladesh. Mango growers are too much anxious about the growing severity of its infestations. The pest causes substantial damage to the adolescent foliage and harshly hampers the growth, flowering and yield of mango. The main damage is caused by female D. marginatus, which cuts young leaves. The most obvious symptom of attack by this pest is presence of young leaf bits below the tree. Stripped shoots can be easily seen on the infested plant from distance. Adult feeding produces “Windowpanes” on young leaves. The attacks also delays the growth of root stock and re- sults in poor success of new grafts (Singh, 2014). Apparently, the biology and behavior of the weevil is complex and not studied elaborately specially the life table parameters. Biological study, in particular life table traits is a significant step to an improved understanding of the population dynamics of pests. This information may be used as an important means in planning pest management pro- gram. Moreover, host plants may have the effects on growth, develop- ment, fecundity rates and mortality of the weevil's population dynamics. Consequently, in order to expand a successful integrated pest management (IPM) program, it is vital to comprehend its life-his- tory parameters on assorted mango varieties. A few studies on the biology of D. marginatus are reported (Rafiquzzaman and Maiti, 1998; Bhole and Dumbre, 1989; Tigvattnanont, 1998; Sahoo and Jha, 2006) but available literatures are surprisingly scanty especially on the life table parameters of the pest on altered mango cultivars in Bangladesh perspectives and most of the data were not in a form useful for modeling purposes. However, it is vital to understand its life-history parameters on different mango vari- eties despite its economic importance and worldwide distribution. Therefore, the present study was carried out to find out the develop- ment rate, immature survivorship and life table parameters of D. marginatus on four popular mango cultivars in the laboratory condi- tions. Having adequate information about a pest is crucial prior to selecting and implementing the appropriate pest management strategy. This paper reports new information on the life history traits of the mango leaf cutting weevil D. marginatus while feeding on various vari- eties of mango. Journal of Asia-Pacific Entomology 20 (2017) 353–357 ⁎ Corresponding author. E-mail address: cjung@andong.ac.kr (C. Jung). http://dx.doi.org/10.1016/j.aspen.2017.02.004 1226-8615/© 2017 Published by Elsevier B.V. on behalf of Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society. Contents lists available at ScienceDirect Journal of Asia-Pacific Entomology journal homepage: www.elsevier.com/locate/jape