First record of cassava mealybug, Phenacoccus manihoti (Hemiptera: Pseudococcidae), in Malaysia

Sartiami, Dewi; Watson, Gillian W.; M.N., MOHAMAD ROFF; Y, MOHD HANIFAH; A.B, Idris

doi:10.11646/zootaxa.3957.2.8

Cited by 21 publications

(22 citation statements)

References 2 publications

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“…Maps on the left (A,C and E) were derived using the Parsa et al [23] parameters; maps on the right (B, D and F) were derived using the new parameter values given in Table 1. Location records were geo-coded from Löhr [10], Neuenschwander [28], Parsa et al [23] and Sartiami et al [29]. …”

Section: Resultsmentioning

confidence: 99%

“…manihoti . Location records were geo-coded from Löhr [10], Neuenschwander [28], Parsa et al [23] and Sartiami et al [29]. …”

Section: Resultsmentioning

confidence: 99%

“…manihoti captures the known distribution well, as it encompasses all known location records, including the latest records from Malaysia [29]. Our model displays greater model sensitivity than the model of Parsa et al (2012), with similar prevalence (specificity), and is created using ecologically plausible parameters that are internally consistent.…”

Section: Discussionmentioning

confidence: 99%

“…manihoti infestations. For Asia, we used the geo-referenced location records provided by Parsa et al [23] and Sartiami et al [29]. …”

Section: Methodsmentioning

confidence: 99%

“…Wet Stress (WS) parameters were adjusted so that WS would not accumulate within the parameter bounds suitable for growth, and so as not to be limiting within the known distribution in South America [10] and in Africa [4, 12, 31]. The final model was validated against the distribution points provided for Asia by Parsa et al [23], Plantwise (http://www.plantwise.org/KnowledgeBank/PWMap.aspx?speciesID=33045&dsID=40173&loc=global), and the recent publication of Sartiami et al [29]. This validation data was reserved from model fitting, and is geographically independent from the data used to fit the model.…”

Section: Methodsmentioning

confidence: 99%

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The potential distribution of cassava mealybug (Phenacoccus manihoti), a threat to food security for the poor

2017

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The cassava mealybug is a clear and present threat to the food security and livelihoods of some of the world's most impoverished citizens. Niche models, such as CLIMEX, are useful tools to indicate where and when such threats may extend, and can assist with planning for biosecurity and the management of pest invasions. They can also contribute to bioeconomic analyses that underpin the allocation of resources to alleviate poverty. Because species can invade and establish in areas with climates that are different from those that are found in their native range, it is essential to define robust range-limiting mechanisms in niche models. To avoid spurious results when applied to novel climates, it is necessary to employ cross-validation techniques spanning different knowledge domains (e.g., distribution data, experimental results, phenological observations). We build upon and update a CLIMEX niche model by Parsa et al. (PloS ONE 7: e47675), correcting inconsistent parameters and re-fitting it based on a careful examination of geographical distribution data and relevant literature. Further, we consider the role of irrigation, the known distribution of cassava production and a targeted review of satellite imagery to refine, validate and interpret our model and results. In so doing, we bring new insights into the potential spread of this invasive insect, enabling us to identify potential bio-security threats and biological control opportunities. The fit of the revised model is improved, particularly in relation to the wet and dry limits to establishment, and the parameter values are biologically plausible and accord with published scientific literature.

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Section: Resultsmentioning

confidence: 99%

“…manihoti . Location records were geo-coded from Löhr [10], Neuenschwander [28], Parsa et al [23] and Sartiami et al [29]. …”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…manihoti infestations. For Asia, we used the geo-referenced location records provided by Parsa et al [23] and Sartiami et al [29]. …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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The potential distribution of cassava mealybug (Phenacoccus manihoti), a threat to food security for the poor

2017

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Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Graziosi

Minato

Álvarez

et al. 2016

Pest Management Science

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Cassava is a major staple, bio-energy and industrial crop in many parts of the developing world. In Southeast Asia, cassava is grown on >4 million ha by nearly 8 million (small-scale) farming households, under (climatic, biophysical) conditions that often prove unsuitable for many other crops. While SE Asian cassava has been virtually free of phytosanitary constraints for most of its history, a complex of invasive arthropod pests and plant diseases has recently come to affect local crops. We describe results from a region-wide monitoring effort in the 2014 dry season, covering 429 fields across five countries. We present geographic distribution and field-level incidence of the most prominent pest and disease invaders, introduce readily-available management options and research needs. Monitoring work reveals that several exotic mealybug and (red) mite species have effectively colonised SE Asia's main cassava-growing areas, occurring in respectively 70% and 54% of fields, at average field-level incidence of 27 ± 2% and 16 ± 2%. Cassava witches broom (CWB), a systemic phytoplasma disease, was reported from 64% of plots, at incidence levels of 32 ± 2%. Although all main pests and diseases are non-natives, we hypothesise that accelerating intensification of cropping systems, increased climate change and variability, and deficient crop husbandry are aggravating both organism activity and crop susceptibility. Future efforts need to consolidate local capacity to tackle current (and future) pest invaders, boost detection capacity, devise locally-appropriate integrated pest management (IPM) tactics, and transfer key concepts and technologies to SE Asia's cassava growers. Urgent action is needed to mobilise regional as well as international scientific support, to effectively tackle this phytosanitary emergency and thus safeguard the sustainability and profitability of one of Asia's key agricultural commodities. © 2016 Society of Chemical Industry.

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Sustainable Management of Invasive Cassava Pests in Vietnam, Cambodia, and Thailand

Tokunaga

Baba

Ishitani

et al. 2018

Crop Production Under Stressful Conditions

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First record of cassava mealybug, Phenacoccus manihoti (Hemiptera: Pseudococcidae), in Malaysia

Cited by 21 publications

References 2 publications

The potential distribution of cassava mealybug (Phenacoccus manihoti), a threat to food security for the poor

The potential distribution of cassava mealybug (Phenacoccus manihoti), a threat to food security for the poor

Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Sustainable Management of Invasive Cassava Pests in Vietnam, Cambodia, and Thailand

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