(Acari: Phytoseiidae) Fed on Corn Pollen S
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Life history parameters of Phytoseius plumifer (Acari: Phytoseiidae) fed on corn pollen S. Khodayari, Y. Fathipour, K. Kamali To cite this version: S. Khodayari, Y. Fathipour, K. Kamali. Life history parameters of Phytoseius plumifer (Acari: Phy- toseiidae) fed on corn pollen. Acarologia, Acarologia, 2013, 53 (2), pp.185-189. 10.1051/acarolo- gia/20132087. hal-01565997 HAL Id: hal-01565997 https://hal.archives-ouvertes.fr/hal-01565997 Submitted on 20 Jul 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives| 4.0 International License ACAROLOGIA A quarterly journal of acarology, since 1959 Publishing on all aspects of the Acari All information: http://www1.montpellier.inra.fr/CBGP/acarologia/ [email protected] Acarologia is proudly non-profit, with no page charges and free open access Please help us maintain this system by encouraging your institutes to subscribe to the print version of the journal and by sending us your high quality research on the Acari. Subscriptions: Year 2017 (Volume 57): 380 € http://www1.montpellier.inra.fr/CBGP/acarologia/subscribe.php Previous volumes (2010-2015): 250 € / year (4 issues) Acarologia, CBGP, CS 30016, 34988 MONTFERRIER-sur-LEZ Cedex, France The digitalization of Acarologia papers prior to 2000 was supported by Agropolis Fondation under the reference ID 1500-024 through the « Investissements d’avenir » programme (Labex Agro: ANR-10-LABX-0001-01) Acarologia is under free license and distributed under the terms of the Creative Commons-BY-NC-ND which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. Schausberger, P. (ed.) Acari in a Changing World: Proceedings of the 7th Symposium of EURAAC, Vienna, 2012 Acarologia 53(2): 185–189 (2013) DOI: 10.1051/acarologia/20132087 LIFE HISTORY PARAMETERS OF PHYTOSEIUS PLUMIFER (ACARI: PHYTOSEIIDAE) FED ON CORN POLLEN Samira KHODAYARI1,2, Yaghoub FATHIPOUR1 and Karim KAMALI1 (Received 12 April 2012; accepted 23 January 2013; published online 28 June 2013) 1Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P.O.Box: 14115-336, Tehran, Iran. [email protected], [email protected] 2Department of Plant Protection, Faculty of Agriculture, University of Maragheh, P.O.Box: 55181-83111, Maragheh, Iran. [email protected] ABSTRACT — The life table parameters of the predatory mite, Phytoseius plumifer (Canestrini and Fanzago) (Acari: Phy- toseiidae) fed on corn pollen (Zea mays L. var. 704) were determined at 27 ± 1 °C, 50 ± 5 % RH and a photoperiod of 16:8 h (L:D). The gross reproductive rate (GRR), net reproductive rate (R0), intrinsic rate of increase (rm), finite rate of increase (λ), mean generation time (T) and doubling time (DT) of P. plumifer were 6.23 female offspring, 4.40 female offspring, 0.112 day-1, 1.118 day-1, 12.99 days and 6.18 days, respectively. Compared to spider mite prey, corn pollen, as the only food source, increased the juvenile developmental time and decreased the longevity and fecundity of adult females of P. plumifer considerably, although the predators could develop and reproduce successfully. KEYWORDS — intrinsic rate of increase; predatory mite; corn pollen INTRODUCTION has been recognized as an important factor in the successful biological control of spider mites (Van Although phytoseiid mites have been mainly de- Rijn and Tanigoshi, 1999; Bouras and Papadoulis, scribed as predators of mites and small insects, 2005). several species can feed and reproduce on pollen The ability to utilize pollen as food source has as well (McMurtry and Croft, 1997; Van Rijn and also been used to characterize the life styles of phy- Tanigoshi, 1999). The potential of phytoseiids to toseiid mites. McMurtry and Croft (1997) catego- regulate phytophagous mites and keep them at rized the life styles of phytoseiid mites based on low equilibrium densities has been more attended their feeding habits and related biological and mor- recently and studies have examined some of the phological traits. The life styles are: type I (spe- characteristics that contribute to the persistence of cialized predators of Tetranychus urticae); type II (se- phytoseiid populations and the ability to feed on lective predators of tetranychids); type III (general- alternative food, such as pollen (McMurtry and ist predators) that may feed on pollen but perform Croft, 1997). Pollen is also known as an easy food better on prey; type IV (specialized pollen feeders source for rearing of phytoseiid mites (McMurtry -generalist predators). Phytoseius species are com- and Scriven, 1964; McMurtry and Croft, 1997) and monly categorized as type III predators. http://www1.montpellier.inra.fr/CBGP/acarologia/ 185 ISSN 0044-586-X (print). ISSN 2107-7207 (electronic) Khodayari S. et al. The predatory mite Phytoseius plumifer and photoperiod of 16:8h (L:D). The rearing arenas (Canestrini and Fanzago) is an important gener- were made from two plastic Petri dishes (8 cm di- alist indigenous predator of tetranychid and erio- ameter × 1.5 cm height and 9 cm diameter × 1.5 cm phyid mites on various crops in Iran (Kamali et al., height). The smaller dish had a central hole in its 2001; Hajizadeh et al., 2002; Nadimi et al., 2009) as base and was placed inside the larger one, which well as in other countries (Rasmy and Elbanhawy, was filled with water to supply the leaf arena. The 1974; Castagnoli and Liguori, 1985). Knowledge leaf arena consisted of a fig leaf placed upside down of the nutritional value of different plant pollens on a moistened layer of cotton (2 mm thick) in the for P. plumifer is not only important for mass rear- smaller Petri dish. Fig leaves were surrounded with ing of the mite, but also for a better understand- water-saturated cotton tissue to prevent escaping of ing of its population dynamics in the field. Some the mites. Mixed life stages of T. urticae and corn phytoseiid species reach their highest reproductive pollen (Zea mays L. var. 704) were provided as food potential on pollen (Bouras and Papadoulis, 2005), sources. The leaf discs were replaced by new ones and in other species spider mites alone are not suit- weekly. able for development unless supplementary foods are added (Zhao and McMurtry, 1990; Broufas and Koveos, 2000). The effect of pollen as food source on Experimental design the life history of predatory mites such as Neoseiulus californicus (McGregor), Typhlodromus pyri Scheuten, Thirty gravid adult females from the stock colony Iphiseius degenerans (Berlese), Neoseiulus cucumeris were transferred to a new arena and left to oviposit (Oudemans), Euseius stipulatus (Athias-Henriot) for 24h at 27 ± 1 °C, 50 ± 5 % RH and a photope- and Euseius finlandicus (Oudemans) has been in- riod of 16:8h (L:D). Females were then removed and vestigated (Overmeer, 1981; (Croft et al., 1998; Van their eggs left to molt to larvae. The study was Rijn and Tanigoshi, 1999; Broufas and Koveos, initiated with 30 larvae but some drowned in the 2000; Bouras and Papadoulis, 2005; Bermudez et surrounding tissue, resulting in 7 females reaching al., 2009). Liguori and Guidi (1990) studied the adulthood and being successfully mated. Newly effect of conditioning Typhlodromus exhilaratus Ra- molted larvae were individually transferred to ex- gusa with different food types including pollen on perimental arenas consisting of punched-out leaf its subsequent prey consumption. Yue et al. (1994) discs. Leaf discs were placed in Petri dishes (3.5 cm compared the suitability of several plant pollens diameter × 1.5 cm height) made in the same man- for rearing Euseius mesembrinus (Dean) under lab- ner as the rearing arenas. Pollen was sprinkled as oratory conditions. The present study deals with food source daily on each unit. The developmen- the effect of corn pollen, as only food source, on tal stages of each individual were recorded every the life table parameters of P. plumifer under labora- 24h. After their last molting, the sex was deter- tory conditions. The provided information could be mined and males were added to the females. Since important for their use as biological control agents. there were not enough males to pair with females, males from the stock colony were used too. The sur- vival of females and their fecundity were recorded MATERIALS AND METHODS daily until the death the last female. The deposited Predator rearing eggs were collected and followed for determination of hatch rate and sex ratio. The following demo- Adult females of P. plumifer were originally col- graphic parameters were calculated (Carey, 1993): lected from a fig orchard located in the Fac- the age specific survivorship (lx), the age specific fe- ulty of Agriculture of Tarbiat Modares University cundity (mx) - which denotes the expected number (35°44´N, 51°10´E, Tehran, Iran) in June 2008. In the of female offspring produced by a surviving female laboratory, the collected mites were transferred onto aged x (Carey, 1982). Lx gives the number of days rearing arenas and kept at 27 ± 1 °C, 50 ± 5 % RH lived by the average individual within a cohort in 186 Schausberger, P. (ed.) Acari in a Changing World: Proceedings of the 7th Symposium of EURAAC, Vienna, 2012 Acarologia 53(2): 185–189 (2013) the interval x to x + 1 and Tx denotes this in total: RESULTS AND DISCUSSION ! l + l X L = x x+1 and T = L Data of P.