Pink Hibiscus Mealybug Identification

Identification of pink hibiscus mealybug is discussed in detail, including its symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and preservation. Accepted for publication 18 March 2006. Published 14 April 2006.

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Detection and Identification of Botrytis Species Associated with Neck Rot, Scape Blight, and Umbel Blight of Onion

Plant Health Progress ◽

10.1094/php-2006-1127-01-dg ◽

2006 ◽

Vol 7 (1) ◽

pp. 38 ◽

Cited By ~ 15

Author(s):

Martin I. Chilvers ◽

Lindsey J. du Toit

Keyword(s):

Host Range ◽

Geographic Distribution ◽

Detection And Identification ◽

And Storage ◽

Symptoms And Signs ◽

Methods Of Isolation

Diagnosis of detection and identification of Botrytis species associated with neck rot, scape blight, and umbel blight of onion are discussed in detail, including the disease's symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification (including macroscopic vs. microscopic characteristics), and storage of the pathogens. Accepted for publication 7 August 2006. Published 27 November 2006.

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Diagnosis of Common Root Rot of Wheat and Barley

Plant Health Progress ◽

10.1094/php-2003-0819-01-dg ◽

2003 ◽

Vol 4 (1) ◽

pp. 11 ◽

Cited By ~ 7

Author(s):

D. E. Mathre ◽

R. H. Johnston ◽

W. E. Grey

Keyword(s):

Host Range ◽

Geographic Distribution ◽

Root Rot ◽

Common Root ◽

Common Root Rot ◽

The Common ◽

And Storage ◽

Symptoms And Signs ◽

Methods Of Isolation

Diagnosis of common root rot of wheat and barley is discussed in detail, including its symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of the common root rot pathogen. Accepted for publication 17 July 2003. Published 19 August 2003.

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Sudden Oak Death and Associated Diseases Caused by Phytophthora ramorum

Plant Health Progress ◽

10.1094/php-2003-0707-01-dg ◽

2003 ◽

Vol 4 (1) ◽

pp. 12 ◽

Cited By ~ 68

Author(s):

J. M. Davidson ◽

S. Werres ◽

M. Garbelotto ◽

E. M. Hansen ◽

D. M. Rizzo

Keyword(s):

Host Range ◽

Geographic Distribution ◽

Leaf Blight ◽

Phytophthora Ramorum ◽

Sudden Oak Death ◽

Associated Diseases ◽

And Storage ◽

Symptoms And Signs ◽

Methods Of Isolation

Diagnosis of Sudden Oak Death, ramorum leaf blight, and ramorum shoot dieback on a wide variety of hosts are discussed in detail, including the symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of Phytophthora ramorum, the pathogen which causes Sudden Oak Death. Accepted for publication 6 June 2003. Published 7 July 2003.

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Gray Leaf Spot of Perennial Ryegrass

Plant Health Progress ◽

10.1094/php-2003-1223-01-dg ◽

2003 ◽

Vol 4 (1) ◽

pp. 10 ◽

Cited By ~ 4

Author(s):

Philip F. Harmon ◽

Richard Latin

Keyword(s):

Host Range ◽

Lolium Perenne ◽

Geographic Distribution ◽

Perennial Ryegrass ◽

Magnaporthe Oryzae ◽

Leaf Spot ◽

Gray Leaf Spot ◽

And Storage ◽

Symptoms And Signs ◽

Methods Of Isolation

Diagnosis of gray leaf spot (caused by Magnaporthe oryzae) of perennial ryegrass (Lolium perenne) is discussed in detail, including the disease's symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of M. oryzae. Accepted for publication 29 January 2003. Published 10 March 2003.

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Isolation, Identification, and Pathogenicity of Phytophthora Blight of Pigeonpea

Plant Health Progress ◽

10.1094/php-04-18-0014-dg ◽

2018 ◽

Vol 19 (3) ◽

pp. 233-236

Author(s):

Mamta Sharma ◽

Raju Ghosh

Keyword(s):

Geographic Distribution ◽

Phytophthora Blight ◽

Causal Organism ◽

Diagnosis And Management ◽

And Storage ◽

Symptoms And Signs ◽

Methods Of Isolation

Phytophthora blight is an emerging threat in pigeonpea. This article briefly discusses diagnosis of Phytophthora blight on pigeonpea including the symptoms and signs, taxonomy, and geographic distribution. Methods of isolation, identification, and storage of Phytophthora cajani (causal organism of Phytophthora blight) are also discussed. This information will be useful to all researchers involved in the diagnosis and management of Phytophthora blight of pigeonpea.

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Host range and geographic distribution of pangola stunt virus and its planthopper vectors in Australia

Australian Journal of Agricultural Research ◽

10.1071/ar9910819 ◽

1991 ◽

Vol 42 (5) ◽

pp. 819 ◽

Cited By ~ 4

Author(s):

DS Teakle ◽

S Hicks ◽

M Karan ◽

JB Hacker ◽

RS Greber ◽

...

Keyword(s):

Host Range ◽

Geographic Distribution ◽

Field Surveys ◽

Natural Hosts ◽

Digitaria Eriantha

Natural hosts of pangola stunt virus (PaSV) in eastern Austalia were found to be Digitaria eriantha ssp. pentzii (pangola grass), D. ciliaris (summer grass) and D. milanjiana. Transmission tests using the planthopper vector, Sogatella kolophon, showed that D. polevansii, D. eriantha ssp. eriantha, D. swazilandensis and the Australian native, D. divaricatissima were also susceptible, whereas D. didactyla was not infected. In tests of 22 species in 15 other genera, only Urochloa panicoides (annual urochloa grass) was infected. In field surveys, PaSV was commonly found in pangola grass in near-coastal districts from Grafton, N.S.W. to Walkamin, N. Qld and was detected up to 100 km inland at Toowoomba. The virus was not detected in either pangola grass or D. eriantha ssp. eriantha in subhumid areas west of Toowoomba or at Gayndah. Sogatella kolophon was collected from Bamaga, N. Qld to Murwillumbah, N.S.W. It was commonly associated with both PaSV-infected and PaSV-free digitgrass pastures. It is concluded that PaSV poses a threat to many digitgrasses in near-coastal districts of Qld and subtropical N.S.W., but so far is unknown in inland Australia.

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Nematodes and cestodes of rodents in South Africa: baseline data on diversity and geographic distribution

Journal of Helminthology ◽

10.1017/s0022149x19000403 ◽

2019 ◽

Vol 94 ◽

Author(s):

A. Spickett ◽

K. Junker ◽

G. Froeschke ◽

V. Haukisalmi ◽

S. Matthee

Keyword(s):

South Africa ◽

Host Range ◽

Geographic Distribution ◽

Host Species ◽

Baseline Data ◽

Helminth Species ◽

Rodent Species ◽

Helminth Parasites ◽

Gastrointestinal Helminths ◽

Naturally Occurring

Abstract Currently, descriptive information on the host range and geographic distribution of helminth parasites associated with naturally occurring rodents in South and southern Africa is scant. Therefore, we embarked on a countrywide study to: (1) identify gastrointestinal helminths and their host range, and (2) provide baseline data on the geographic distribution of helminths across the country. Altogether, 55 helminth taxa were recovered from at least 13 rodent species (n = 1030) at 26 localities across South Africa. The helminth taxa represented 25 genera (15 nematodes, nine cestodes and one acanthocephalan). Monoxenous nematodes were the most abundant and prevalent group, while the occurrence of heteroxenous nematodes and cestodes was generally lower. The study recorded several novel helminth–host associations. Single-host-species infections were common, although multiple-host-species infections by helminth species were also recorded. Monoxenous nematodes and some cestodes were recovered countrywide, whereas heteroxenous nematodes were restricted to the eastern regions of South Africa. The study highlights the as yet unexplored diversity of helminth species associated with naturally occurring rodent species and provides initial data on their geographical distribution in South Africa.

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Host range and geographic distribution of Armillaria root rot pathogens in the Canadian prairie provinces

Canadian Journal of Forest Research ◽

10.1139/x90-249 ◽

1990 ◽

Vol 20 (12) ◽

pp. 1859-1863 ◽

Cited By ~ 20

Author(s):

K. I. Mallett

Keyword(s):

Host Range ◽

Geographic Distribution ◽

Host Species ◽

Root Rot ◽

Boreal Forests ◽

Common Species ◽

Canadian Prairie ◽

Armillaria Root Rot ◽

Armillaria Species ◽

Prairie Provinces

A survey to identify Armillaria root rot pathogens, their host range, and geographic distribution was conducted in the Canadian prairie provinces. Collections of basidiocarps and isolates from the wood of gymptomatic or dead trees were made. Armillaria species were identified by interfertility testing and by the L-DOPA method. Three Armillaria species, A. ostoyae (Romagn.) Herink, A. sinapina Bérubé & Dessureault, and A. calvescens Bérubé & Dessureault, were identified. Armillariaostoyae was the most common species in both the subalpine and boreal forests and was found on a wide variety of coniferous and deciduous host species. Armillariasinapina was in both the boreal and subalpine forests but occurred primarily on deciduous host species. Armillariacalvescens was rare and was found only in the boreal forest on both coniferous and deciduous host species.

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Geographic Distribution and Host Range of Lethal Bronzing Associated with Phytoplasma Subgroup 16SrIV-D on Palms in Southern Louisiana

Plant Health Progress ◽

10.1094/php-06-20-0046-s ◽

2020 ◽

Vol 21 (4) ◽

pp. 350-355

Author(s):

Mary Helen Ferguson ◽

Raghuwinder Singh ◽

Madeline Cook ◽

Timothy Burks ◽

Kevin Ong

Keyword(s):

Host Range ◽

New Orleans ◽

Geographic Distribution ◽

Small Proportion ◽

Canary Island ◽

Date Palm ◽

Date Palms ◽

Phoenix Canariensis ◽

Sabal Palmetto ◽

City Park

Lethal bronzing (LB), also previously known as date palm lethal decline or Texas Phoenix palm decline, associated with phytoplasma subgroup 16SrIV-D, was first identified in Louisiana in December 2013. A survey of palms showed that the disease was not only confined to City Park in New Orleans, where it was first detected, but is present in other parts of Orleans Parish, as well as two adjacent parishes. Canary Island date palms (Phoenix canariensis) tested positive at the highest frequency, and some edible date palms (P. dactylifera) and a small proportion of cabbage palms (Sabal palmetto) tested positive as well. Symptoms do not appear to be a reliable indicator of LB, because a substantial proportion of palms indicated as symptomatic tested negative. Furthermore, not all infected palms showed symptoms. Since the palm survey conducted in 2015 to 2016, LB has positively been identified from silver date palm (P. sylvestris) and Chinese windmill palm (Trachycarpus fortunei) in three additional parishes in Louisiana.

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