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    The influence of organic matter content and media compaction on the dispersal of entomopathogenic nematodes with different foraging strategies


    Kapranas, Apostolos and Maher, Abigail M.D. and Griffin, Christine (2017) The influence of organic matter content and media compaction on the dispersal of entomopathogenic nematodes with different foraging strategies. Parasitology, 144 (14). pp. 1956-1963. ISSN 0031-1820

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    Abstract

    In laboratory experiments, we investigated how media with varying ratio of peat:sand and two levels of compaction influence dispersal success of entomopathogenic nematode (EPN) species with different foraging strategies: Steinernema carpocapsae (ambusher), Heterorhabditis downesi (cruiser) and Steinernema feltiae (intermediate). Success was measured by the numbers of nematodes moving through a 4 cm column and invading a wax moth larva. We found that both compaction and increasing peat content generally decreased EPN infective juvenile (IJ) success for all three species. Of the three species, H. downesi was the least affected by peat content, and S. carpocapsae was the most adversely influenced by compaction. In addition, sex ratios of the invading IJs of the two Steinernema species were differentially influenced by peat content, and in the case of S. feltiae, sex ratio was also affected by compaction. This indicates that dispersal of male and female IJs is differentially affected by soil parameters and that this differentiation is species-specific. In conclusion, our study shows that organic matter: sand ratio and soil compaction have a marked influence on EPN foraging behaviour with implications for harnessing them as biological pest control agents.

    Item Type: Article
    Keywords: entomopathogenic nematodes; soil organic matter; peat; soil compaction; foraging behaviour; dispersal; infection; sex ratio;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 11552
    Identification Number: https://doi.org/10.1017/S0031182017001317
    Depositing User: IR Theres
    Date Deposited: 01 Nov 2019 14:42
    Journal or Publication Title: Parasitology
    Publisher: Cambridge University Press
    Refereed: Yes
    URI:

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