Effects of dasheen mosaic virus and a large bacilliform particle on the anatomy and ultrastructure of Colocasia esculenta (L.) Schott (Araceae)

Author(s):  
B. D. Stein ◽  
M. S. Strauss

Taro, Colocasia esculenta (L.) Schott (Araceae) is a monocot grown as a starchy root crop in much of the tropics and subtropics. It is subject to a number of fungal, bacterial, and viral diseases. Viral diseases have inhibited the cultivation of taro in parts of New Guinea and the Solomon Islands where taro is an integral part of the culture. Two different viruses, a Rhabdovirus, the Large Bacilliform Particle (LBP), and a smaller bacilliform virus, are the cause. Dasheen Mosaic Virus, a Potyvirus, has been found wherever taro is cultivated and produces a leaf mottle but is not lethal to plants.Colocasia esculenta cv K268 corms, infected with virus, were obtained from Michael Pearson, Department of Botany, University of Papua New Guinea, Port Moresby, New Guinea. Upon planting some of the corms produced leaves with virus symptoms. Others were symptomless but symptoms could be induced by stress.

Author(s):  

Abstract A new distribution map is provided for Hirschmanniella miticausa Bridge et al. Nematoda: Tylenchida: Pratylenchidae Hosts: Taro (Colocasia esculenta). Information is given on the geographical distribution in OCEANIA, Papua New Guinea, Solomon Islands, OCEANIA, Papua New Guinea, Solomon Islands.


Author(s):  

Abstract A new distribution map is provided for Dasheen bacilliform badnavirus Viruses: Caulimoviridae: Badnavirus Hosts: Colocasia esculenta, Xanthosoma sagittifolium. Information is given on the geographical distribution in OCEANIA, Cook islands, Fiji, Papua New Guinea, Samoa, Solomon Islands, Vanuatu.


Author(s):  

Abstract A new distribution map is provided for Tarophagus proserpina (Kirkaldy). Hemiptera: Delphacidae. Host: taro (Colocasia esculenta). Information is given on the geographical distribution in Oceania (American Samoa, Cook Islands, Fiji, French Polynesia, New Caledonia, Niue, Papua New Guinea, Samoa, Solomon Islands, Tonga and Vanuatu).


Asian Survey ◽  
2007 ◽  
Vol 47 (1) ◽  
pp. 200-205 ◽  
Author(s):  
James Chin

Michael Somare reshuffled his cabinet twice and dumped Bart Philemon, the finance minister widely credited as the architect of Papua New Guinea's economic recovery. Record prices for oil and commodities gave the government economic growth and a record surplus. The country's relations with Australia reached a new low over the arrest of Julian Moti, the Solomon Islands' attorney general, in Port Moresby.


Viruses ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 482
Author(s):  
Alice Michie ◽  
John S. Mackenzie ◽  
David W. Smith ◽  
Allison Imrie

Ross River virus (RRV) is the most medically significant mosquito-borne virus of Australia, in terms of human morbidity. RRV cases, characterised by febrile illness and potentially persistent arthralgia, have been reported from all Australian states and territories. RRV was the cause of a large-scale epidemic of multiple Pacific Island countries and territories (PICTs) from 1979 to 1980, involving at least 50,000 cases. Historical evidence of RRV seropositivity beyond Australia, in populations of Papua New Guinea (PNG), Indonesia and the Solomon Islands, has been documented. We describe the genomic characterisation and timescale analysis of the first isolate of RRV to be sampled from PNG to date. Our analysis indicates that RRV has evolved locally within PNG, independent of Australian lineages, over an approximate 40 year period. The mean time to most recent common ancestor (tMRCA) of the unique PNG clade coincides with the initiation of the PICTs epidemic in mid-1979. This may indicate that an ancestral variant of the PNG clade was seeded into the region during the epidemic, a period of high RRV transmission. Further epidemiological and molecular-based surveillance is required in PNG to better understand the molecular epidemiology of RRV in the general Australasian region.


2014 ◽  
Vol 53 (5) ◽  
pp. 471-483 ◽  
Author(s):  
Gwendalyn Vengiau ◽  
Masahiro Umezaki ◽  
Suparat Phuanukoonnon ◽  
Peter Siba ◽  
Chiho Watanabe

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