scholarly journals Pests, diseases and crop protection practices in the smallholder sweetpotato production system of the highlands of Papua New Guinea

2016 ◽  
Author(s):  
Geoff M Gurr ◽  
Jian Liu ◽  
Anne C Johnson ◽  
Deane N Woruba ◽  
Gunnar Kirchhof ◽  
...  
Keyword(s):  
Disease Management ◽  
Papua New Guinea ◽  
Crop Protection ◽  
Signs And Symptoms ◽  
New Guinea ◽  
Developed Countries ◽  
General Level ◽  
Storage Roots ◽  
Cash Crop ◽  
Wide Range

Sweetpotato (Ipomea batatans) is a food crop of global significance. The storage roots and foliage of crop are attacked by a wide range of pests and diseases. Whilst these are generally well controlled in developed countries using approaches such as clean planting material and monitoring with pheromone traps to guide insecticide use, research into methods suitable for developing countries has lagged. In Papua New Guinea (PNG), sweetpotato is grown extensively as a subsistence crop and commercial production as a cash crop is developing. We report results from a survey of 33 smallholder producers located in the Highlands of PNG where the crop is of particular importance. Surveys of interviewees’ crops showed high levels of pest and disease impact to foliage, stems and storage roots, especially in crops that were several years old. Weevils (Curculionidae) were reportedly the most damaging pests and scab (caused by the fungus Elisnoe batatus) the most damaging disease. Most producers reported root damage from the former and foliar damage from the latter but the general level of knowledge of pest and disease types was low. Despite the apparency of pest and disease signs and symptoms and recognition of their importance by farmers, a large majority of producers reported practiced no active pest or disease management. This was despite low numbers of farmers reporting use of traditional cultural practices including phytosanitary measures and insecticidal plants that had the scope for far wider use. Only one respondent reported use of insecticide though pesticides were available in nearby cities. This low level of pest and disease management in most cases, likely due to paucity in biological and technical knowledge among growers, hampers efforts to establish food security and constrains the development of sweetpotato as a cash crop.

scholarly journals Pests, diseases and crop protection practices in the smallholder sweetpotato production system of the highlands of Papua New Guinea

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2703 ◽  
Author(s):  
Geoff M. Gurr ◽  
Jian Liu ◽  
Anne C. Johnson ◽  
Deane N. Woruba ◽  
Gunnar Kirchhof ◽  
...  
Keyword(s):  
Disease Management ◽  
Papua New Guinea ◽  
Crop Protection ◽  
Signs And Symptoms ◽  
New Guinea ◽  
Developed Countries ◽  
General Level ◽  
Storage Roots ◽  
Cash Crop ◽  
Wide Range

Sweetpotato (Ipomea batatans) is a food crop of global significance. The storage roots and foliage of crop are attacked by a wide range of pests and diseases. Whilst these are generally well controlled in developed countries using approaches such as clean planting material and monitoring with pheromone traps to guide insecticide use, research into methods suitable for developing countries has lagged. In Papua New Guinea (PNG), sweetpotato is grown extensively as a subsistence crop and commercial production as a cash crop is developing. We report results from a survey of 33 smallholder producers located in the Highlands of PNG where the crop is of particular importance. Surveys of interviewees’ crops showed high levels of pest and disease impact to foliage, stems and storage roots, especially in crops that were several years old. Weevils (Curculionidae) were reportedly the most damaging pests and scab (caused by the fungusElisnoe batatus) the most damaging disease. Most producers reported root damage from the former and foliar damage from the latter but the general level of knowledge of pest and disease types was low. Despite the apparency of pest and disease signs and symptoms and recognition of their importance by farmers, a large majority of producers reported practiced no active pest or disease management. This was despite low numbers of farmers reporting use of traditional cultural practices including phytosanitary measures and insecticidal plants that had the scope for far wider use. Only one respondent reported use of insecticide though pesticides were available in nearby cities. This low level of pest and disease management in most cases, likely due to paucity in biological and technical knowledge among growers, hampers efforts to establish food security and constrains the development of sweetpotato as a cash crop.

scholarly journals Pests, diseases and crop protection practices in the smallholder sweetpotato production system of the highlands of Papua New Guinea

2016 ◽  
Author(s):  
Geoff M Gurr ◽  
Jian Liu ◽  
Anne C Johnson ◽  
Deane N Woruba ◽  
Gunnar Kirchhof ◽  
...  
Keyword(s):  
Disease Management ◽  
Papua New Guinea ◽  
Crop Protection ◽  
Signs And Symptoms ◽  
New Guinea ◽  
Developed Countries ◽  
General Level ◽  
Storage Roots ◽  
Cash Crop ◽  
Wide Range

Sweetpotato (Ipomea batatans) is a food crop of global significance. The storage roots and foliage of crop are attacked by a wide range of pests and diseases. Whilst these are generally well controlled in developed countries using approaches such as clean planting material and monitoring with pheromone traps to guide insecticide use, research into methods suitable for developing countries has lagged. In Papua New Guinea (PNG), sweetpotato is grown extensively as a subsistence crop and commercial production as a cash crop is developing. We report results from a survey of 33 smallholder producers located in the Highlands of PNG where the crop is of particular importance. Surveys of interviewees’ crops showed high levels of pest and disease impact to foliage, stems and storage roots, especially in crops that were several years old. Weevils (Curculionidae) were reportedly the most damaging pests and scab (caused by the fungus Elisnoe batatus) the most damaging disease. Most producers reported root damage from the former and foliar damage from the latter but the general level of knowledge of pest and disease types was low. Despite the apparency of pest and disease signs and symptoms and recognition of their importance by farmers, a large majority of producers reported practiced no active pest or disease management. This was despite low numbers of farmers reporting use of traditional cultural practices including phytosanitary measures and insecticidal plants that had the scope for far wider use. Only one respondent reported use of insecticide though pesticides were available in nearby cities. This low level of pest and disease management in most cases, likely due to paucity in biological and technical knowledge among growers, hampers efforts to establish food security and constrains the development of sweetpotato as a cash crop.

Revision of Coronostrongylus (Nematoda : Strongyloidea) parasitic in the stomachs of macropodid marsupials

2002 ◽  
Vol 16 (6) ◽  
pp. 893 ◽  
Author(s):  
I. Beveridge
Keyword(s):  
Papua New Guinea ◽  
Host Species ◽  
Related Species ◽  
New Guinea ◽  
Nematode Species ◽  
Closely Related Species ◽  
Nematode Genus ◽  
Eastern Australia ◽  
Wide Range ◽  
Species Occurrences

The monotypic nematode genus Coronostrongylus Johnston & Mawson, 1939 from the stomachs of macropodid marsupials was reviewed and was found to consist of a least seven closely related species. Coronostrongylus coronatus Johnston & Mawson, 1939 is found most commonly in Macropus rufogriseus, but occurs occasionally in M. dorsalis, M. parryi and Petrogale inornata. Coronostrongylus johnsoni, sp. nov. is most commonly found in M. dorsalis, but occurs also in M. rufogriseus, M. parma, Thylogale stigmatica, Petrogale godmani and P. brachyotis. Coronostrongylus barkeri, sp. nov. is most prevalent in Onychogalea unguifera, but occurs also in M. rufus, M. robustus and P. brachyotis. Coronostrongylus closei, sp. nov. is restricted to Petrogale persephone. Coronostrongylus sharmani, sp. nov. occurs only in rock wallabies from eastern Australia: P.�coenensis, P. godmani and P. mareeba; C. spratti, sp. nov. occurs in P. inornata and P. assimilis. Coronostrongylus spearei, sp. nov. is restricted to Papua New Guinea where it is found in Dorcopsulus vanhearni, Dorcopsis hageni and D. muelleri. Although all of the nematode species occur in one principal host species or a series of closely related host species, occurrences in geographically disjunct areas and in phylogenetically distant hosts are features of C. coronatus, C. barkeri, sp. nov. and C. johnsoni, sp. nov. The occurrence of seven closely related nematode species found in a wide range of macropodid host species is more readily accounted for by a hypothesis involving multiple colonisations of hosts than by the hypothesis of co-speciation.

Materials and methods.

2022 ◽  
pp. 5-5
Author(s):  
Richard A. I. Drew ◽  
Meredith C. Romig
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Fruit Fly ◽  
Methyl Eugenol ◽  
Microscopic Identification ◽  
Host Fruit ◽  
Large Numbers ◽  
Wide Range

Abstract Large numbers of dacine specimens were collected throughout Papua New Guinea by trapping and host fruit sampling. Steinertype fruit fly traps, baited with cue lure, methyl eugenol or vanillylacetone (zingerone), were set in many localities over a wide range of ecosystems. In most cases, the traps were serviced on 2-week cycles for at least 1 year. Samples of rainforest and cultivated fruits were collected in some provinces. All specimens collected were preserved in a dry state and sent to R.A.I. Drew at Griffith University, Brisbane, Australia, for microscopic identification and curation. Data and photographs of Bactrocera longicornis were received from the Museum Nationale d'Histoire Naturelle, Paris, France. The subgeneric classification used herein follows Drew and Hancock (2016) and Hancock and Drew (2006, 2015, 2016, 2017a,b,c,d,e, 2018a,b,c, 2019).

Conceptions of Health and Illness Held by Australian Aboriginal, Torres Strait Islander, and Papua New Guinea Health Science Students

2002 ◽  
Vol 8 (2) ◽  
pp. 9 ◽  
Author(s):  
Gillian Boulton-Lewis ◽  
Hitendra Pillay ◽  
Lynn Wilss ◽  
David Lewis
Keyword(s):  
Papua New Guinea ◽  
Torres Strait Islander ◽  
New Guinea ◽  
Educational Status ◽  
Developed Countries ◽  
Health Science ◽  
Human Right ◽  
Science Courses ◽  
Health And Illness ◽  
Torres Strait

Health is considered to be a fundamental human right and developing a better understanding of health is assumed to be a global social goal (Bloom, 1987). Yet many third-world countries and some sub-populations within developed countries do not enjoy a healthy existence. The research reported in this paper examined the conceptions of health and conceptions of illness for a group of Aboriginal, Torres Strait Islander, and Papua New Guinea university students studying health science courses. Results found three conceptions of health and three conceptions of illness that indicated these students held a mix of traditional/cultural and Western beliefs. These findings may contribute to overcoming the dissonance between traditional and Western beliefs about health and the development of health care courses that are more specific to how these students understand health. This may also serve to improve the educational status of Aboriginal and Torres Strait Islander people and potentially improve the health status within these communities.

scholarly journals Review: A PNG media era when development mattered

2014 ◽  
Vol 20 (2) ◽  
pp. 248
Author(s):  
Scott MacWilliam
Keyword(s):  
Papua New Guinea ◽  
Major Change ◽  
New Guinea ◽  
Popular Literature ◽  
Journalism History ◽  
The People ◽  
Wide Range ◽  
The Press ◽  
Science Methodology ◽  
Social Science Methodology

Review of: Press, Politics and People in Papua New Guinea 1950-1975, by Philip Cass. Auckland: Unitec e-Press, 2014, 205pp. ISBN 978-1-927214-09-1Press, Politics and People should be required reading for people who are concerned with the history and current trajectory of Papua New Guinea. It is also a book with much to offer for university courses in journalism, history and social science methodology. Philip Cass shows in considerable detail how to research and write a detailed study about an important topic by employing a wide range of research methods, including interviews, content analysis of newspapers, analysing academic and popular literature, and engaging in archival searches. Significantly, he does not waste any time ‘interrogating the Other’, but sustains several arguments about the place of the press during a critical moment when major change was in the air for the people of Papua New Guinea.

Valuable and Useful: Mid-Holocene Stemmed Obsidian Artefacts from West New Britain, Papua New Guinea

2002 ◽  
Vol 68 ◽  
pp. 61-81 ◽  
Author(s):  
Nick Araho ◽  
Robin Torrence ◽  
J. Peter White
Keyword(s):  
Spatial Distribution ◽  
Papua New Guinea ◽  
Special Functions ◽  
New Guinea ◽  
Settlement Pattern ◽  
Ground Stone ◽  
Wide Range ◽  
Competing Models ◽  
New Britain

Distinctive obsidian artefacts from West New Britain appear sometime before 3950 cal BC and terminate abruptly at 1650 cal BC. We propose that they had a wide range of meanings for their users and functioned in both utilitarian and ceremonial contexts, similar to more recent ground stone axes from Highland New Guinea. They therefore represent the earliest evidence for valuables in Papua New Guinea. Here we draw together studies of the technology, spatial distribution, and chemical sourcing of the artefacts, along with considerations of fragility and brightness, to evaluate competing models for their function as utilitarian items and as exchange goods. Whereas many artefacts were probably useful tools integrated within a mobile settlement pattern, others were clearly reserved for special functions, and many may have operated in both the utilitarian and ceremonial spheres.

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