Evaluation of weed eradication programs: the delimitation of extent

Panetta, F. D.; Lawes, Roger

doi:10.1111/j.1366-9516.2005.00179.x

Cited by 86 publications

(99 citation statements)

References 9 publications

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“…The importance of the size of the infestation for eradication success suggests that eradication measures should concentrate on the early phase of the invasion when infestations are still relatively small. This also highlights the importance of delimiting the infestation quickly after its discovery, in order to have a solid basis for decision-making and investing the appropriate efforts in surveillance and control measures (Panetta and Roger 2005;Panetta 2007). As pointed out by Panetta and Lawes (2007), a N=22 N=37 N=17 N=15 N=5 N=43 N=28 N=21 N=6 N=40 N=16 N=21 N=40 N=47 Mean success rate ≥1000 Fig.…”

Section: Discussionmentioning

confidence: 99%

When are eradication campaigns successful? A test of common assumptions

et al. 2012

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Eradication aims at eliminating populations of alien organisms from an area. Since not all eradications are successful, several factors have been proposed in the literature (mainly by referring to case studies) to be crucial for eradication success, such as infestation size or reaction time. To our knowledge, however, no study has statistically evaluated which factors affect eradication success and attempted to determine their relative importance. We established a unique global dataset on 136 eradication campaigns against 75 species (invasive alien invertebrates, plants and plant pathogens) and statistically tested whether the following factors, proposed by others were significantly related to eradication success: (1) the reaction time between the arrival/detection of the organism and the start of the eradication campaign; (2) the spatial extent of the infestation; (3) the level of biological knowledge of the organism; and (4) insularity. Of these, only the spatial extent of the infestation was significantly related to the eradication outcome: local campaigns were more successful than regional or national campaigns. Reaction time, the level of knowledge and insularity were all unrelated to eradication success. Hence, some factors suggested as being crucial may be less important than previously thought, at least for the organisms tested here. We found no differences in success rates among taxonomic groups or geographic regions. We recommend that eradication measures should generally concentrate on the very early phase of invasions when infestations are still relatively small.

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Section: Discussionmentioning

confidence: 99%

When are eradication campaigns successful? A test of common assumptions

et al. 2012

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“…The species is widely naturalized in Africa and South America (Holm et al 1979;Tanji and Taleb 1997;Shu 2003). Although introduced into Australia in 1990 as a forage, kochia has now been eradicated in the country (Natural Heritage Trust 2003;Panetta and Lawes 2005).…”

Section: Geographical Distributionmentioning

confidence: 99%

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Friesen¹,

Beckie²,

Warwick³

et al. 2009

Can. J. Plant Sci.

111

164

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Kochia [Kochia scoparia (L.) Schrad.] is an annual broadleaf weed species native to Eurasia and introduced as an ornamental to the Americas by immigrants in the mid- to late 1800s. Although sometimes categorized in the genus Bassia, there is no compelling reason for this classification. This naturalized species is a common and economically important weed in crop production systems and ruderal areas in semiarid to arid regions of North America, and has expanded northward in the Canadian Prairies during the past 30 yr. Although primarily self-pollinated, substantial pollen-mediated gene flow and efficient seed dispersal aids both short- and long-distance spread. The weed is morphologically highly variable, and its growth and development are markedly affected by environmental conditions. Kochia, a C4 species, is highly competitive in cropping systems because of its ability to germinate at low soil temperatures and emerge early, grow rapidly, tolerate heat, drought and salinity, and exert allelopathic effects on neighboring species. Moreover, herbicidal control has been compromised to some extent by the widespread evolution of herbicide resistance in the species. Kochia is used as a forage, is palatable to livestock with nutritional value similar to that of alfalfa (Medicago sativa), but can be toxic if it comprises the majority of the diet. Although kochia pollen is an allergen, the seed is a source of phytochemicals including mosquito pheromones and saponins that are potentially beneficial to human health; kochia also is beneficial in phytoremediation of soils contaminated by hydrocarbons or pesticides. Key words: Kochia, Kochia scoparia, Bassia scoparia, herbicide resistance, soil salinity tolerance, weed biology

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“…That is, the model may fail to adequately predict the extent of an incursion. We acknowledge the inability to delimit extent as a very real issue for eradication campaigns (Panetta and Lawes 2005). The model presented is limited to assimilating information about pests early in the incursion phase when they are locally dispersed by natural diffusive processes.…”

Section: Discussionmentioning

confidence: 99%

Hierarchical Bayesian modelling of early detection surveillance for plant pest invasions

2010

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Early detection surveillance programs aim to find invasions of exotic plant pests and diseases before they are too widespread to eradicate. However, the value of these programs can be difficult to justify when no positive detections are made. To demonstrate the value of pest absence information provided by these programs, we use a hierarchical Bayesian framework to model estimates of incursion extent with and without surveillance. A model for the latent invasion process provides the baseline against which surveillance data are assessed. Ecological knowledge and pest management criteria are introduced into the model using informative priors for invasion parameters. Observation models assimilate information from spatio-temporal presence/absence data to accommodate imperfect detection and generate posterior estimates of pest extent. When applied to an early detection program operating in Queensland, Australia, the framework demonstrates that this typical surveillance regime provides a modest reduction in the estimate that a surveyed district is infested. More importantly, the model suggests that early detection surveillance programs can provide a dramatic 123 570 Environ Ecol Stat (2011) 18:569-591 reduction in the putative area of incursion and therefore offer a substantial benefit to incursion management. By mapping spatial estimates of the point probability of infestation, the model identifies where future surveillance resources can be most effectively deployed.

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Evaluation of weed eradication programs: the delimitation of extent

Cited by 86 publications

References 9 publications

When are eradication campaigns successful? A test of common assumptions

When are eradication campaigns successful? A test of common assumptions

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Hierarchical Bayesian modelling of early detection surveillance for plant pest invasions

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