The scientific investigation of the failure of the potato crop in Ireland, 1845-6

1946 ◽  
Vol 5 (18) ◽  
pp. 123-138 ◽  
Author(s):  
Thomas P. O'Neill
Keyword(s):  
North America ◽  
South America ◽  
Phytophthora Infestans ◽  
Potato Crop ◽  
Scientific Investigation ◽  
European Countries ◽  
Staple Food ◽  
Early Autumn

In the harvest of 1845 a disease, hitherto unknown in Ireland, phytophthora infestans, attacked the potato crop. The disease had made its appearance some years previously in north America and shortly afterwards in Europe. There is reason to believe that it already existed in south America, and it is possible that its failure to reach Europe with the early-introduced tubers was due to diseased tubers rotting during the long voyages under ‘ sail ’. The progress of the blight in European countries in the summer and early autumn of 1845 was reported in the Dublin Evening Post, which, without raising any serious alarm, pointed out the danger to the crop in Ireland. The seriousness of a failure of the staple food of the majority of the population must have been clear to every man struck by that possibility.

scholarly journals International increase in Salmonella enteritidis: A new pandemic?

1990 ◽  
Vol 105 (1) ◽  
pp. 21-27 ◽  
Author(s):  
D. C. Rodrigue ◽  
R. V. Tauxe ◽  
B. Rowe
Keyword(s):  
North America ◽  
South America ◽  
Atlantic Ocean ◽  
Salmonella Enteritidis ◽  
European Countries ◽  
The Past ◽  
America South ◽  
Global Increase ◽  
Salmonella Serotype ◽  
Reported Data

SUMMARYOver the past 5 years Salmonella enteritidis infections in humans have increased on both sides of the Atlantic ocean. The WHO salmonella surveillance data for 1979–87 were reviewed and show that S. enteritidis appears to be increasing on at least the continents of North America, South America, and Europe, and may include Africa. S. enteritidis isolates increased in 24 (69%) of 35 countries between 1979 and 1987. In 1979, only 2 (10%) of 21 countries with reported data reported S. enteritidis as their most common salmonella serotype; in 1987, 9 (43%) of 21 countries reported S. enteritidis as their most common serotype; 8 (89 %) of 9 were European countries. Although the reason for the global increase is not yet clear, investigations in individual countries suggest it is related to consumption of eggs and poultry which harbour the organism.

scholarly journals Influence of countries adopted social distancing policy for COVID-19 reduction under the view of the airborne transmission framework

2020 ◽  
Author(s):  
CHARLES ROBERTO TELLES
Keyword(s):  
North America ◽  
Middle East ◽  
South America ◽  
South Korea ◽  
East Africa ◽  
European Countries ◽  
Infection Rates ◽  
Airborne Transmission ◽  
Geographical Regions ◽  
Policy Measures

Cumulative COVID-19 daily new cases dataset during January to April, 2020 were used to search for evidences of SARS-CoV-2 spreading patterns (transmission forms) in the geographical regions with samples of Asia, South America, North America, Middle East, Africa and European countries. In order to comprehend the cause of constant infection rates for some countries, while others present very low daily new cases (China and South Korea), this research investigated possible aerosols forming patterns in the atmosphere and its relation to policy measures adopted by selected countries.

Effects of insecticides on adults and eggs of Drosophila suzukii (Diptera, Drosophilidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 208 ◽  
Author(s):  
Daniele Cristine Hoffmann Schlesener ◽  
Jutiane Wollmann ◽  
Juliano De Bastos Pazini ◽  
Anderson Dionei Grützmacher ◽  
Flávio Roberto Mello Garcia
Keyword(s):  
North America ◽  
South America ◽  
Chemical Control ◽  
Stone Fruits ◽  
Drosophila Suzukii ◽  
Ovicidal Effect ◽  
Mere Presence ◽  
South Of Brazil ◽  
Different Cultures ◽  
First Time

Drosophila suzukii (Diptera, Drosophilidae) is an exotic species, endemic to Asia and currently a pest to small and stone fruits in several countries of North America and Europe. It was detected in 2013 for the first time in South America, in the south of Brazil. Unlike most drosophilids, this species deserves special attention, because the females are capable of oviposit inside healthy fruits, rendering their sale and export prohibited. Despite the confirmed existence of this species in different states of Brazil, this insect is yet been to be given the pest status. Nevertheless, the mere presence of this species is enough to cause concern to producers of small fruits and to justify further investigation for it’s control, especially chemical control for a possible change in status. Therefore, the goal of this work was to evaluate, in laboratory, mortality of D. suzukii adults and ovicidal effect when exposed to different insecticides registered for species of the Tephritidae and Agromyzidae families in different cultures. The insecticides deltamethrin, dimethoate, spinosad, fenitrothion, phosmet, malathion, methidathion, and zeta-cypermethrin resulted in mortality to 100 % of the subjects three days after the treatment (DAT). Regarding the effects over eggs, it was  established that the insecticides fenitrothion, malathion, and methidathion deemed 100 % of the eggs not viable, followed by phosmet and diflubenzuron, which also caused elevated reduction in the eclosion of larvae two DAT.

BIOSYSTEMATIC STUDIES ON XANTHIUM: TAXONOMIC APPRAISAL AND ECOLOGICAL STATUS

1959 ◽  
Vol 37 (2) ◽  
pp. 173-208 ◽  
Author(s):  
Doris Löve ◽  
Pierre Dansereau
Keyword(s):  
North America ◽  
South America ◽  
Ecological Status ◽  
Distinct Species ◽  
Eastern North America ◽  
Flowering Response ◽  
Short Day ◽  
Stable Species ◽  
Enormous Variation

The following paper is an evaluation of the taxonomic and ecological status of the genus Xanthium L. A review of its systematics demonstrates that many so-called "species" described on material from Europe actually have their origin in America, except one, X. strumarium s. str., which seems to have a Mediterranean–European center of dispersal. Another conclusion drawn is that Xanthium consists of only two distinct species: X. spinosum L. and X. strumarium L. The former is a relatively stable species, the latter an enormously variable one readily subdivided into a number of minor taxonomic entities.Ecologically, in eastern North America at least, Xanthium is primarily a beach plant, which prefers open habitats and succumbs to crowding. The seeds are most often dispersed by water and wind. It enters easily into ruderal habitats, but only as long as these are open and unshaded.The generalized short-day flowering response in this genus supports our hypothesis that Xanthium has a tropical–subtropical origin, and we feel that it has its center in Central and/or South America, whence it has spread over the continents north and southward.There is no evidence for any sterility barriers separating the entities of X. strumarium, but we feel that an intense inbreeding with an occasional outbreeding is responsible for the enormous variation, often resulting in small, local, but unstable taxa.

scholarly journals Memoirs of a frequent flier: Phylogenomics reveals 18 long-distance dispersals between North America and South America in the popcorn flowers (Amsinckiinae)

2017 ◽  
Vol 104 (11) ◽  
pp. 1717-1728 ◽  
Author(s):  
C. Matt Guilliams ◽  
Kristen E. Hasenstab-Lehman ◽  
Makenzie E. Mabry ◽  
Michael G. Simpson
Keyword(s):  
North America ◽  
South America ◽  
Long Distance

Peronospora farinosa. [Distribution map].

1981 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Central America ◽  
West Indies ◽  
Spinacia Oleracea ◽  
Uttar Pradesh ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Peronospora farinosa Kiessl. Hosts: Beet (Beta vulgaris) and other B. spp., Spinach (Spinacia oleracea), Chenopodium spp. Information is given on the geographical distribution in AFRICA, Ethiopia, Kenya, Libya, Morocco, South Africa, Tanzania, Zimbabwe, ASIA, Afghanistan, Burma, China, Hong Kong, India (Northern States) (Uttar Pradesh) (Madhya Pradesh), Iran, Iraq, Israel, Japan, Korea, Lebanon, Mongolia, Nepal, Pakistan, Taiwan, Thailand, Turkey, USSR, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Belgium, Britain, Bulgaria, Cyprus, Czechoslovakia, Denmark, France, Germany, Greece, Hungary, Iceland, Irish Republic, Italy (Sardina), Malta, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, USSR, Yugoslavia, NORTH AMERICA, Canada, Mexico, USA, CENTRAL AMERICA & WEST INDIES, Guatemala, SOUTH AMERICA, Argentina, Bolivia, Brazil (Sao Paulo), Chile, Ecuador, Peru, Uruguay.

Corynebacterium michiganense pv. michiganense. [Distribution map].

1984 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Central America ◽  
West Indies ◽  
Buenos Aires ◽  
Distribution Map ◽  
Rio Negro ◽  
New Distribution

Abstract A new distribution map is provided for Corynebacterium michiganense pv. michiganense (E.F. Smith) Jensen. Hosts: Tomato (Lycopersicon esculentun). Information is given on the geographical distribution in AFRICA, Kenya, Madagascar, Morocco, South Africa, Tunisia, Uganda, Zambia, Zimbabwe, ASIA, China, India (Nagpur), Israel, Japan, Lebanon, Turkey, AUSTRALASIA & OCEANIA, Australia, Hawaii, New Zealand, EUROPE, Austria, Britain, Channel Islands (Jersey), Bulgaria, Germany, Greece, Hungary, Ireland, Italy (incl. Sicily), Norway, Portugal, Romania, Sardinia, Switzerland, USSR (general, Lithuania, W. Siberia and Crimea), Yugoslavia, NORTH AMERICA, Canada, Nova Scotia, Mexico, USA (general), CENTRAL AMERICA & WEST INDIES, Costa Rica, Cuba, Dominica, Dominican Republic, Panama, SOUTH AMERICA, Argentina (Buenos Aires), (Goldenberg), (Mendoza), (Misiones & Rio Negro), Brazil (Sao Paulo), Chile (Santiago), Colombia, Peru.

Phaeoisariopsis bataticola. [Distribution map].

1990 ◽  
Author(s):  
Keyword(s):  
Puerto Rico ◽  
North America ◽  
South America ◽  
Dominican Republic ◽  
Central America ◽  
Sweet Potato ◽  
Geographical Distribution ◽  
West Indies ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Phaeoisariopsis bataticola (Cif. & Bruner) M.B. Ellis. Host: sweet potato (Ipomoea spp.). Information is given on the geographical distribution in NORTH AMERICA, USA, Florida, CENTRAL AMERICA & WEST INDIES, Cuba, Dominican Republic, Puerto Rico, SOUTH AMERICA, Venezuela.

Mirafiori lettuce big-vein virus. [Distribution map].

2015 ◽  
Author(s):  
Keyword(s):  
Saudi Arabia ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Central America ◽  
Distribution Map ◽  
Main Host ◽  
Virus Distribution ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Miraflori lettuce big-vein virus. Ophioviridae: Ophiovirus. Main host: lettuce (Lactuca sativa). Information is given on the geographical distribution in Europe (Belgium, Czechoslovakia, France, Germany, Greece, Italy, Netherlands, Poland, Slovenia, Spain, Sweden and UK), Asia (Iran, Japan, Saudi Arabia and Turkey), North America (Canada, British Columbia, Ontario, Quebec, Mexico, USA, Arizona, California and Florida), Central America and Caribbean (Bermuda), South America (Argentina, Brazil, Sao Paulo, Chile and Colombia) and Oceania (Australia, Queensland, Victoria, Western Australia and New Zealand).

Sign in / Sign up

Export Citation Format

Share Document