Potential for Cleopus japonicus to control the weed Buddleja davidii in plantation forests in New Zealand

Watson, M. C.; Watt, Michael S.; Withers, T. M.; Kimberley, Mark O.; Rolando, Carol A.

doi:10.1016/j.foreco.2010.09.031

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…As was predicted by the population modelling (Kriticos et al 2009) feeding damage by C. japonicus is strongly seasonal (Watson et al 2011), with the greatest damage in late summer to autumn when most B. davidii plants, from seedlings to very large bushes, become completely defoliated. This peak is a result of a dramatic increase in the number of larvae present at this time.…”

Section: Discussionmentioning

confidence: 69%

“…At first, C. japonicus dispersal was relatively slow. At the first five release sites made in 2006-2007 the weevil was calculated to have dispersed on average between 27 and 65 m/year (Watson et al 2011). At the coastal release site near Ohope, which is the warmest of these sites, C. japonicus has been particularly successful at colonising sites of previously undamaged B. davidii.…”

Section: Discussionmentioning

confidence: 99%

“…Yet, Kriticos et al (2005) predicted that all of New Zealand is climatically suitable for B. davidii other than the higher altitude mountainous areas, so it poses a potential threat to all disturbed habitats over much wider areas than its current distribution reveals. The weevil appears to be well suited to the New Zealand climate, with the greatest effect on buddleia seen at the warmer sites (Watson et al 2011).…”

Section: Discussionmentioning

confidence: 99%

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Cleopus japonicus releases and distribution of the buddleia biological control agent in New Zealand

Watson¹,

Withers²,

Heaphy³

2011

NZPP

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The buddleia leaf weevil Cleopus japonicus was released in New Zealand by Scion in 2006 as a biological control agent for the weed Buddleja davidii One thousand C japonicus adults were released at each of five commercial forest sites in the North Island A further 33 releases of approximately 14910 C japonicus were made between 2006 and 2011 in the North and South Islands on both privately and publicallyowned land and sites of conservation importance The weevil is known to have established at all sites with the possible exception of one release made in 2007 Location data of C japonicus provided by local and regional councils DOC forest health officers and others have provided information on the spread of C japonicus These data show C japonicus has spread over 50 km from some release sites and is rapidly increasing in population density and distribution

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Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Cleopus japonicus releases and distribution of the buddleia biological control agent in New Zealand

Watson¹,

Withers²,

Heaphy³

2011

NZPP

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“…To benefit forest weed management a biocontrol agent should impact on its host weed within 2-3 years after the crop is planted. Watson et al (2011b) showed that dispersal of the buddleia weevil Cleopus japonicus Wingelmüller was variable but that damage above the threshold to reduce buddleia growth occurred >150 m from two of three release sites within 2.5 years of release. It was concluded that there is potential for C. japonicus to colonise and damage emerging buddleia plants sufficiently rapidly to benefit forestry.…”

Section: Discussionmentioning

confidence: 99%

Dispersal of the Scotch broom gall mite Aceria genistae implications for biocontrol

Paynter

Gourlay²,

Rolando³

et al. 2012

NZPP

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The gall mite Aceria genistae a biological control agent of Scotch broom Cytisus scoparius was first released in New Zealand in 2007 The dispersal ability of A genistae was investigated to determine whether slow dispersal might limit its ability to control Scotch broom in forestry plantations where a rapid impact of biocontrol is required Transects were set up from the original release plants at four sites in Canterbury New Zealand and the presence or absence of galled plants was recorded at increasing distances from the release plants until no more galled plants could be found The maximum dispersal rate recorded was 833 m/year which is unlikely to be fast enough to greatly benefit forestry in New Zealand Techniques may have to be developed to enhance mite dispersal in forestry plantations

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“…Over the period 2007 to 2015, much of this research was focused on finding suitable alternatives to or reducing the use of the widely used, and highly effective, active ingredients terbuthylazine 1 and hexazinone 1 (Rolando et al 2011;Rolando and Watt 2014;Watson et al 2010;Watt and Rolando 2014;Tran et al 2015). Between 2007 and 2015, these active ingredients were listed as "highly hazardous" by the Forest Stewardship Council (FSC) and could not be used on FSC-certified forest land without derogation (Forest Stewardship Council 2007, 2015.…”

Section: Introductionmentioning

confidence: 99%

Herbicide options for managing competitive vegetation during the establishment of Pinus radiata and Pseudotsuga menziesii var. menziesii in Southland, New Zealand

Rolando

Watt

Todoroki

et al. 2017

N.Z. j. of For. Sci.

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Background: Control of weeds is important for survival, growth and uniformity of planted conifers, such as Pinus radiata D.Don and Pseudotsuga mensiesii var. menziesii (Mirb.) Franco. Despite pressure to find environmentally benign herbicides for these species, little research has identified non-residual herbicides that are cost-effective and result in minimal growth loss compared to those used operationally. The objective of this study was to compare efficacy and cost of current operational practice to a range of alternative herbicide treatments for the establishment of these two species using data from two trials located at the same site. Methods: Treatments for each species were applied in both the first and second year following planting and included weed-free controls, operational practice using terbuthylazine and hexazinone (applied as both spot treatment and broadcast application) and a range of treatments consisting of combinations of clopyralid, triclopyr and haloxyfop (CTH), applied with or without oversowing with less competitive grasses and annual herbaceous species. Application of glyphosate during winter was included within the Pseudotsuga mensiesii trial as a first year treatment only and as a second year treatment following spot application of CTH in the first year. Results: For the Pinus radiata trial, broadcast application of CTH in spring of years 1 and 2 was most effective, with mean stand volume (m 3 ha −1 ), at 2.5 years, exceeding the weed-free control and operational treatment by 8 and 11%, respectively, although these differences were not statistically significant at the 5% level. Use of the operational treatment as a spot in the first year, followed by broadcast application of CTH in the second year, was moderately effective when used with or without oversowing. For the Pseudotsuga mensiesii trial, the four most effective treatments were the operational treatment, broadcast application of CTH during year 1 (CTH-Dec), broadcast application of CTH during spring of years 1 and 2, and broadcast application of glyphosate during winter (winter glyphosate). Although not significantly different, at 2.5 years mean stand volumes in these treatments were on average 24, 29, 33 and 35% lower than the weed-free control, respectively. Both CTH-Dec and winter glyphosate were less expensive than the operational treatment.

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Potential for Cleopus japonicus to control the weed Buddleja davidii in plantation forests in New Zealand

Cited by 8 publications

References 20 publications

<i>Cleopus japonicus</i> releases and distribution of the buddleia biological control agent in New Zealand

<i>Cleopus japonicus</i> releases and distribution of the buddleia biological control agent in New Zealand

Dispersal of the Scotch broom gall mite <i>Aceria genistae</i> implications for biocontrol

Herbicide options for managing competitive vegetation during the establishment of Pinus radiata and Pseudotsuga menziesii var. menziesii in Southland, New Zealand

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