Effect of temperature on woodwasp (Sirex noctilio F.) development and parasitism by the entomopathogenic nematode, Deladenus siricidicola

Yousuf, Fazila; Carnegie, Angus J.; Bedding, R.A.; Bashford, Richard; Nicol, H. I.; Gurr, Geoff M.

doi:10.1016/j.biocontrol.2014.08.007

Cited by 17 publications

(11 citation statements)

References 42 publications

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“…Abiotic factors, especially temperature, also undoubtedly affect the physiological processes involved in sterilization. A recent paper (Yousuf et al, 2014) In an evolutionary context, non-sterilization is not necessarily a bad thing for the woodwasp population. In fact the occurrence and persistence of D. siricidicola in other parts of the world suggest that it may be a useful adaptation (Bedding, 1972;Bedding, 1974;Nuttall, 1980).…”

Section: Discussionmentioning

confidence: 99%

Biological control of Sirex noctilio (Hymenoptera: Siricidae) in the northeastern United States using an exotic parasitic nematode

Williams¹,

Hajek

2017

Biological Control

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The woodwasp Sirex noctilio is a devastating killer of pines in the southern hemisphere. Over the 20 th Century, it has invaded exotic pine plantations in New Zealand, Australia, South America, and South Africa successively. In response to this woodwasp threat, in the 1960-70s CSIRO in Australia launched a major campaign of exploration for biological control agents in Europe, the Middle East, and North Africa, the presumed indigenous range of S. noctilio. The most promising natural enemy discovered was a nematode, Deladenus siricidicola, which lives inside a pine tree as a mycophagous form but becomes parasitic when near host larvae and sterilizes adult woodwasp females. Australian scientists developed a biological control management system based on the nematode, including how to rear and release it in the field. The CSIRO program has been a model for Sirex management in the pine-growing regions of the southern hemisphere since the 1960s. Thus, when S. noctilio was collected in North America in 2004, it seemed natural to try using the Australian model as a simple technology transfer. Unfortunately the transfer has not proved to be so simple. In the following, we present the results of six years of experimental controlled release studies, in which no nematodes were actually released into the field. One of the first discoveries was that another strain, a "non-sterilizing" strain, of D. siricidicola was already present in the areas invaded by S. noctilio. Our annual studies compared infection rates between trees inoculated with the Australian "Kamona strain" and controls without nematodes. In most cases, the treated trees had the higher rates of nematode parasitism, but the controls were not always zero, suggesting that the non-sterilizing strain was wellestablished in our study plots. Many of the Kamona-treated trees did not contain Kamonas, suggesting that the non-sterilizing strain may have out-competed the Kamonas. Even with Kamona treatments, there was relatively little sterilization, indeed much less than expected. It Williams and Hajek, page 3 seems likely that the S. noctilio strain invading North America is physiologically different from the Australian nematode and not susceptible to Kamona sterilization. Another interesting result was observed between host tree species. In a three-year study, nematode parasitism rates were consistently higher in P. sylvestris than in P. resinosa and significantly higher when the three years of data were pooled. We conclude with the observation that the Kamona strain is apparently not compatible with the S. noctilio invading North America and suggest that more exploration is needed in its area of origin for different and more effective nematode genotypes.

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Section: Discussionmentioning

confidence: 99%

Biological control of Sirex noctilio (Hymenoptera: Siricidae) in the northeastern United States using an exotic parasitic nematode

Williams¹,

Hajek

2017

Biological Control

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“…Further, we compared our sequences to those from previous studies (Schiff et al, 2012) and found no differences (100% match). Incomplete sterilization has been documented in S. noctilio infected with D. siricidicola (Yousuf et al, 2014a), and in both Sirex cyaneus Fabricius and Urocercus californicus (Ashmead) infected with the generalist D. nevexii (Bedding, 1974). However our results, in combination with the known ability of S. nigricornis, S. noctilio and D. proximus to feed on A. chailletii and A. areolatum (Hajek et al, 2013;Hurley et al, 2012;Leal et al, 2012;Morris et al, 2012), suggest that the native nematode, D. proximus collected from Louisiana, Illinois and South…”

Section: 3genetic Homogeneity Across Color Morphs In Sirex Nigricomentioning

confidence: 97%

“…siricidicola on S. noctilio (Villacide and Corley, 2008;Yousuf et al, 2014a) and Deladenus sp. on S. nigricornis (Keeler, 2012).…”

Section: Prevalence and Effects On Hostmentioning

confidence: 99%

Pathology, distribution, morphological and genetic identity of Deladenus proximus (Tylenchida: Neotylenchidae) a parasitic nematode of the woodwasp, Sirex nigricornis in the eastern United States

Zieman

Reeve

Braswell³

et al. 2015

Biological Control

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“…Considerable evidence has shown that climate change will aggravate the impacts of the naturalization and subsequent invasion of invasive species into novel communities and ecosystems (Walsh, Carpenter & Zanden, 2016;Ekesi et al, 2016;Paini et al, 2016). Moreover, rising temperatures can significantly influence the physiological characteristics of insect lift history and population dynamics, such as development rate, voltinism and distribution range (Bellard et al, 2013;Yousuf et al, 2014;Duan et al, 2014). Understanding the change in potential distribution due to climate change is a critical foundation that is required to manage and control the introduction of alien species (Massin et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #3 of "Predicting the potential distributions of the invasive cycad scale Aulacaspis yasumatsui (Hemiptera: Diaspididae) under different climate change scenarios and the implications for management (v0.3)"

2018

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Cycads are an ancient group of gymnosperms that are popular as landscaping plants, though nearly all of them are threatened or endangered in the wild. The cycad aulacaspis scale (CAS), Aulacaspis yasumatsui Takagi (Hemiptera: Diaspididae), has become one of the most serious pests of cycads in recent years; however, the potential distribution range and the management approach for this pest are unclear. A potential risk map of cycad aulacaspis scale was created based on occurrence data under different climatic conditions and topology factors in this study. Furthermore, the future potential distributions of CAS were projected for the periods 2050s and 2070s under three different climate change scenarios (GFDL-CM3, HADGEM2-AO and MIROC5) described in the Special Report on Emissions Scenarios of the IPCC (Intergovernmental Panel on Climate Change). The model suggested high environmental suitability for the continents of Asia and North America, where the species has already been recorded. The potential distribution expansions or reductions were also predicted under different climate change conditions. Temperature of Driest Quarter (Bio9) was the most important factor, explaining 48.1% of the distribution of the species. The results also suggested that highly suitable habitat for CAS would exist in the study area if the mean temperature of 15-20℃in the driest quarter and a mean temperature of 25-28 ℃ in the wettest quarter. This research provides a theoretical reference framework for developing policy to manage and control this invasive pest.

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Effect of temperature on woodwasp (Sirex noctilio F.) development and parasitism by the entomopathogenic nematode, Deladenus siricidicola

Cited by 17 publications

References 42 publications

Biological control of Sirex noctilio (Hymenoptera: Siricidae) in the northeastern United States using an exotic parasitic nematode

Biological control of Sirex noctilio (Hymenoptera: Siricidae) in the northeastern United States using an exotic parasitic nematode

Pathology, distribution, morphological and genetic identity of Deladenus proximus (Tylenchida: Neotylenchidae) a parasitic nematode of the woodwasp, Sirex nigricornis in the eastern United States

Peer Review #3 of "Predicting the potential distributions of the invasive cycad scale Aulacaspis yasumatsui (Hemiptera: Diaspididae) under different climate change scenarios and the implications for management (v0.3)"

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