A Roadside Survey of the Invasive Weed<i>Parthenium hysterophorus</i>(Asteraceae) in East Africa

Wabuyele, E.; Lusweti, A.; Bisikwa, Jenipher; Kyenune, Gerald; Clark, Krissie; Lotter, W.D.; McConnachie, Andrew; Mersie, Wondi

doi:10.2982/028.103.0105

Cited by 23 publications

(30 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It appears that the road network is the major conduit for the dispersal and subsequent development of satellite populations of this weed in Nepal, similar to that reported in other parts of the world (Blackmore & Johnson, ; McConnachie et al ., ; Wabuyele et al ., ). The single‐seeded fruit is small but, unlike other members of the Asteraceae, less likely to be dispersed over long distances by wind (Navie et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…These could not have been produced by natural processes alone. A similar dispersal pattern has also been reported in Pakistan (Shabbir et al ., ), Africa (McConnachie et al ., ; Wabuyele et al ., ) and Australia (Blackmore & Johnson, ). When the expansion rate of satellite populations of invasive weeds is faster than that of source populations (Radosevich et al ., ), the occurrence of satellite populations in climatically suitable regions (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…However, it is highly likely that the damage will be significant in near future this weed is starting to invade diverse cropping systems rapidly (Shrestha et al ., ) and the geographic extent of its suitable habitat is likely to increase under future climate change scenarios (Shrestha et al ., ). Furthermore, similar to the report from Africa (McConnachie et al ., ; Wabuyele et al ., ), its widespread occurrence in fertile zones with agriculture potential (e.g., the Tarai, valleys of Siwalik and Middle Mountains regions) may have serious consequences to food security. Besides human‐dominated ecosystems, there are several reports of the occurrence of P. hysterophorus in natural ecosystems including protected areas (Adkins & Shabbir, ; Wabuyele et al ., ).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, similar to the report from Africa (McConnachie et al ., ; Wabuyele et al ., ), its widespread occurrence in fertile zones with agriculture potential (e.g., the Tarai, valleys of Siwalik and Middle Mountains regions) may have serious consequences to food security. Besides human‐dominated ecosystems, there are several reports of the occurrence of P. hysterophorus in natural ecosystems including protected areas (Adkins & Shabbir, ; Wabuyele et al ., ). The blocking effect of native vegetation present in the protected area, against invasive species (Foxcroft et al ., ), may be less effective in situations where the highway passes along park borders (as with Parsa and Sukla Panta National Parks) or through them (as in Bardia and Banke National Parks).…”

Section: Discussionmentioning

confidence: 99%

“…Distribution data for P. hysterophorus and its biological control agent Z. bicolorata were obtained through a nationwide survey along the road networks using a global positioning system (GPSmap 62sc, Garmin). The road network appears to be a major conduit for the dispersal of P. hysterophorus (Blackmore & Johnson, 2010), making roadside surveys the most used tool for distribution mapping of this weed (McConnachie et al, 2011;Shabbir et al, 2012;Wabuyele et al, 2014). The survey was undertaken during the 2013 monsoon season (mid-Junelate September) when the growth of P. hysterophorus was at its most luxurious in Nepal (Shrestha et al, 2015).…”

Section: Survey and Mappingmentioning

confidence: 99%

See 4 more Smart Citations

Distribution of Parthenium hysterophorus and one of its biological control agents (Coleoptera: Zygogramma bicolorata) in Nepal

et al. 2019

View full text Add to dashboard Cite

Summary Parthenium hysterophorus is a noxious invasive weed of both agricultural and natural ecosystems, spreading aggressively in Nepal. Management of this weed in Nepal has been limited, mainly because of the lack of geo‐referenced data concerning the weed's distribution. We conducted a nationwide survey of P. hysterophorus and its coleopteran biological control agent Zygogramma bicolorata from 2013 to 2016 to determine their spatial distribution. Both were widespread, with the distribution of Z. bicolorata lagging behind the invasion front of P. hysterophorus. The weed was present in 21.2% of the 4838 locations examined, including several isolated satellite populations. The weed was found in the Tarai, Siwalik, Middle Mountains and High Mountains regions, reaching up to 2000 m asl. It has invaded natural and modified ecosystems including all six protected areas in the Tarai and Siwalik regions. Road access appears to be the major pathway for its long‐distance dispersal. Zygogramma bicolorata had spread from the east to the west and was present in 15.4% of the weed occurrence locations, inflicting a low amount of damage. A CLIMEX modelling projection revealed the presence of additional geographic areas in Nepal which are climatically suitable for both P. hysterophorus and Z. bicolorata. Eradication of satellite populations of the weed by physical and chemical measures, and the release of Z. bicolorata into new, but climatically suitable, locations should be prioritised for P. hysterophorus management in Nepal. In conclusion, P. hysterophorus has rapidly become widespread in Nepal and the currently available biological control agent has not been able to prevent further spread of the weed.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Survey and Mappingmentioning

confidence: 99%

See 3 more Smart Citations

Distribution of Parthenium hysterophorus and one of its biological control agents (Coleoptera: Zygogramma bicolorata) in Nepal

et al. 2019

View full text Add to dashboard Cite

show abstract

Action on Invasive Species: Control Strategies of Parthenium hysterophorus L. on Smallholder Farms in Kenya

Tabe‐Ojong¹,

Álvarez

Ihli

et al. 2021

Environmental Management

View full text Add to dashboard Cite

Parthenium hysterophorus L. (Asteraceae) is an invasive alien weed with detrimental effects on agricultural production, biodiversity, human and animal health, threating rural livelihoods in Asia and Africa. The problem emerged recently in the Kenyan Rift Valley, where it began to affect the landholdings of both agro-pastoralists and crop farmers. These vulnerable smallholders depend heavily on natural resources for their livelihoods. In this study, we assessed the severity of parthenium invasion and farmers’ management responses using a sample of 530 agro-pastoralists in Baringo County, Kenya, in 2019. We hypothesise that the implementation of existing management strategies depends on the state of parthenium invasion and household socio-economic characteristics. The prevalence and severity of parthenium invasion differed greatly among field plots. To control weeds, farmers resort to either hand weeding, the use of synthetic herbicides, or intensive tillage, sometimes in combination with mulching. A multivariate probit regression model shows that households’ characteristics determine the type of control strategies used as well as their complementarity and substitutability. Hand weeding is the most common option, adopted by almost 40% of farmers. The use of agrochemicals or soil-based control strategies appears to be related to knowledge and information characteristics such as access to extension services, membership in organisations and the educational level of household heads. While hand weeding and the use of synthetic herbicides depict significant substitutability, the latter strategy is limited to a few larger farms with market-oriented production. As parthenium invasion continues, policies need to improve farmer awareness and access to knowledge to enable pro-poor and environmentally sustainable control of parthenium on smallholder farms.

show abstract

Host range tests cast doubt on the suitability of Epiblema strenuana as a biological control agent for Parthenium hysterophorus in Africa

McConnachie

2015

BioControl

View full text Add to dashboard Cite

A Roadside Survey of the Invasive WeedParthenium hysterophorus(Asteraceae) in East Africa

Cited by 23 publications

References 10 publications

Distribution of Parthenium hysterophorus and one of its biological control agents (Coleoptera: Zygogramma bicolorata) in Nepal

Distribution of Parthenium hysterophorus and one of its biological control agents (Coleoptera: Zygogramma bicolorata) in Nepal

Action on Invasive Species: Control Strategies of Parthenium hysterophorus L. on Smallholder Farms in Kenya

Host range tests cast doubt on the suitability of Epiblema strenuana as a biological control agent for Parthenium hysterophorus in Africa

Contact Info

Product

Resources

About