Effects of clover root weevil and moisture stress on subterranean, balansa, Persian, arrowleaf and white clovers

Crush, J. R.; Gerard, P.J.; Ouyang, L.; Wilson, D.R.

doi:10.33584/jnzg.2008.70.2705

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…Within Trifolium spp. it feeds on white clover (T. repens), red clover (T. pratense), strawberry clover (T. fragiferum), alsike clover (T. hybridum), caucasian clover (T. ambiguum), crimson clover (T. incarnatum), subterranean clover (T. subterraneum), suckling clover (T. dubium), clustered clover (T. glomeratum) and striated clover (T. striata) (Murray 1996a;Hardwick 1998;Crush et al 2007Crush et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Clover root weevil tolerance of clover cultivars

Ferguson¹,

Barton²,

Philip³

2016

Journal of NZ Grasslands

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Clover root weevil arrived in New Zealand about 20 years ago causing major loss of productivity as it progressively spread across the whole country. It is now largely controlled by an introduced parasitic wasp biocontrol agent Microctonus aethiopoides (Irish ecotype). However, management of insect pests should not rely on a single mechanism and clovers resistant or tolerant to this weevil would be a useful augmentation for farmers to have. This investigation reports on the suitability of 22 clover cultivars to attack from the weevil. Results have shown that contrary to popular belief, red clovers are not universally less favourable to the weevil than white clovers and usefully, within both species cultivar differences point to the possibility of resistance to this pest. Keywords: Clover root weevil, Sitona obseletus, clover cultivars

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Section: Introductionmentioning

confidence: 99%

Clover root weevil tolerance of clover cultivars

Ferguson¹,

Barton²,

Philip³

2016

Journal of NZ Grasslands

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“…Seedling survival of all annual clovers tested was not significantly affected by CRW. Dryland pastures with established annual clovers are relatively tolerant to CRW larval damage, and CRW populations are severely limited by summer drought (Crush et al 2008), so it is likely that CRW is not a problem for establishment of these clovers in dryland sites.…”

Section: Discussionmentioning

confidence: 99%

Effects of invertebrate pests on white and annual clovers in dryland soil

Eden

Gerard²,

Wilson³

et al. 2010

NZPP

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Two experiments were carried out at Ruakura in soil taken from Whatawhata hill country pasture The relative susceptibility of several annual clovers (Trifolium spp) and perennial white clover (T repens) to slugs (Deroceras reticulatum) clover root weevil (Sitona lepidus) adults native crickets (Nemobius sp) or wheat bugs (Nysius huttoni) was tested by sowing seed of the clovers into separate rows in turf Susceptibility of clovers to clover cyst nematode (Heterodera trifolii) was tested by sowing each clover variety into Whatawhata soil inoculated with the nematode Plant growth was assessed in both experiments 4 weeks after sowing White clover was more susceptible to pests than the annual clovers with slugs and clover root weevil significantly reducing seedling survival and clover cyst nematode significantly reducing plant growth Subterranean clover (T subterraneum) cv Denmark was the least affected by pests showing no significant reduction in survival in the presence of slugs the most damaging pest and no significant decrease in plant root and shoot dry weight when exposed to nematodes

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“…Sitona lepidus feeds only on Trifolium spp. with a strong preference for white clover (Murray & Clements, 1994; Crush et al , 2008). In keeping with the trends observed with invasive populations of S. discoideus in lucerne (Goldson et al , 1986), S. lepidus larval survival has been found to increase linearly with increasing availability of root nodules, which provide food and protection for the vulnerable first instar larvae (Gerard, 2001).…”

Section: Discussionmentioning

confidence: 99%

The bionomics of an invasive speciesSitona lepidusduring its establishment in New Zealand

Gerard

Goldson

Hardwick

et al. 2009

Bull. Entomol. Res.

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The egg, larval, pupal and adult abundance of the clover root weevil Sitona lepidus Gyllenhal (Coleoptera: Curculionidae) was monitored at three sites for the first ten years following the discovery of this exotic pest in the Waikato region of New Zealand. The species went through an initial boom and bust cycle at two sites, with populations reaching up to 1800 larvae m-2. Thereafter, winter larval populations were relatively stable, ranging between 450-750 m-2. Unlike in the Northern Hemisphere, S. lepidus was found to have two generations a year in the Waikato region of New Zealand. Pasture white clover content at the time of peak adult numbers was positively related to the subsequent peak larval populations for each generation. The factors contributing to the emergence of S. lepidus as one of the most important pasture pests in New Zealand are discussed.

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Effects of clover root weevil and moisture stress on subterranean, balansa, Persian, arrowleaf and white clovers

Cited by 6 publications

References 8 publications

Clover root weevil tolerance of clover cultivars

Clover root weevil tolerance of clover cultivars

Effects of invertebrate pests on white and annual clovers in dryland soil

The bionomics of an invasive speciesSitona lepidusduring its establishment in New Zealand

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