Phytophthora erythroseptica. [Descriptions of Fungi and Bacteria].

1978 ◽  
Author(s):  
D. Jean Stamps
Keyword(s):  
Central America ◽  
Geographical Distribution ◽  
Root Rot ◽  
Pink Rot ◽  
Phytophthora Erythroseptica ◽  
Flowering Stem ◽  
Tulip Bulbs ◽  
And Storage ◽  
Rhizome Rot ◽  
Apparently Healthy

Abstract A description is provided for Phytophthora erythroseptica. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Potato, asparagus, cineraria, tomato, pea, raspberry, tulip, Zantedeschia, sugarcane, vetch. DISEASE: Pink rot of potato; shanking of tulip; rhizome rot and leaf blight of Zantedeschia; sugarcane seed-piece rot; raspberry root rot; tomato buckeye rot. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Irish Republic, Belgium, Bulgaria, France, Greece, Italy, Netherlands, Poland, Switzerland, USSR, Yugoslavia); Asia (India, Indonesia, Iran); Africa (Egypt); N. America (Canada, USA); Central America (Cuba); S. America (Venezuela, Peru); Australia; New Zealand. (CMI Map 83, ed. 4, 1973). TRANSMISSION: Soil-borne, oospores disseminated from diseased potato stems and roots persisting for many years. In the field tubers are generally infected through the stolon, but direct infection through eyes may occur in field and storage under moist conditions (13, 180; 19, 40). Transmission during storage, and survival of inoculum in apparently healthy tubers, was shown to be possible (57, 758). Tulip bulbs were invaded from the soil through the roots to the basal plate and flowering stem (18, 183).

Phytophthora cryptogea. [Descriptions of Fungi and Bacteria].

1978 ◽  
Author(s):  
D. Jean Stamps
Keyword(s):  
Geographical Distribution ◽  
High Frequency ◽  
Crown Rot ◽  
Damping Off ◽  
Phytophthora Cryptogea ◽  
Root Rots ◽  
Pink Rot ◽  
Wide Range ◽  
Tulip Bulbs ◽  
Leaf Rot

Abstract A description is provided for Phytophthora cryptogea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On a wide range of glasshouse and field crops. Tomato, ornamentals (including petunia, aster, chrysanthemum, Tagetes, tulip, wallflower, Gerbera, gloxinia, Matthiola, Papaver, cineraria, dahlia, Gypsophila, Hebe, Rhododendron, Osteospermum, zinnia), potato, chicory, spinach, bean, onion, cucurbits, eggplant, hop, sunflower, safflower, lucerne, Cupressus, Chamaecyparis, chestnut and others. DISEASE: Damping-off and foot rot of tomato; foot rots of aster, Matthiola and Gerbera; black neck of chrysanthemum; tulip shanking; corm, stem and leaf rot of gloxinia; crown rot of Iceland poppy; pink rot of potato; sunflower stem rot; chestnut wilt; damping-off, root rots and wilts of many other hosts. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Irish Republic, Austria, Czechoslovakia, Denmark, France, Germany, Greece, Italy, Netherlands); Africa (Egypt, Rhodesia); Asia (Iran); Australia; New Zealand; N. America (Canada, USA). (CMI Map 99, ed. 4, 1976). TRANSMISSION: Soil-borne, persisting for several years (6, 669). Tulip bulbs were invaded from the soil (18, 183). Movement of zoospores was studied (56, 1029). Isolates were obtained from glasshouse water supplies (1, 94). There was a high frequency of recovery on baiting irrigation water in Victoria (57, 2174).

Rosellinia pepo. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
C. Booth
Keyword(s):  
Central America ◽  
Geographical Distribution ◽  
Root Rot ◽  
West Indies ◽  
Woody Debris ◽  
Pigeon Pea ◽  
Thin Plates ◽  
Restricted Range ◽  
The West ◽  
American Tropics

Abstract A description is provided for Rosellinia pepo. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: According to Waterston (1941) R. pepo has a more restricted range than R. bunodes. Susceptible species include avocado, banana, breadfruit, cacao, coffee, dasheen (Colocasia antiquorum), jak (Artocalpus integer), horse bean (Canavalia sp.), immortelle (Erythrina), lime, nutmeg, pigeon pea, West Indian locust (Hymenaea coulbalii). DISEASE: Black root rot, mainly of tropical and subtropical woody hosts; plurivorous but recorded less often than R. bunodes (CMI Descript. 351), with which it has often been associated in the American tropics. At the collar the mycelial fan has a light grey margin, shading to brown or purplish-black. On roots the greyish cobweb-like strands become black and coalesce into a woolly or felt-like mass. Beneath the bark white fans (star-like) of mycelium occur on the surface of the wood. Thin plates of mycelium in the wood appear as zig-zag lines in section. In culture deep brown, later olive green, strands, white becoming black. GEOGRAPHICAL DISTRIBUTION: Apparently at present restricted to central America, the West Indies and West Africa; other records are of doubtful authenticity. TRANSMISSION: As mycelium from surface organic litter and woody debris.

scholarly journals In-Furrow Applications of Metalaxyl and Phosphite for Control of Pink Rot (Phytophthora erythroseptica) of Potato in New Brunswick, Canada

Plant Disease ◽  
2007 ◽  
Vol 91 (10) ◽  
pp. 1305-1309 ◽  
Author(s):  
Khalil I. Al-Mughrabi ◽  
Rick D. Peters ◽  
H. W. (Bud) Platt ◽  
Gilles Moreau ◽  
Appanna Vikram ◽  
...  
Keyword(s):  
New Brunswick ◽  
Disease Incidence ◽  
Field Trials ◽  
Russet Burbank ◽  
Viable Option ◽  
Potato Plants ◽  
Pink Rot ◽  
Phytophthora Erythroseptica ◽  
Sensitive Isolate ◽  
The Mean

The efficacy of metalaxyl-m (Ridomil Gold 480EC) and phosphite (Phostrol) applied at planting in-furrow against pink rot (Phytophthora erythroseptica) of potato (Solanum tuberosum) ‘Shepody’ and ‘Russet Burbank’ was evaluated in field trials conducted in 2005 and 2006 in Florenceville, New Brunswick, Canada. Inoculum made from a metalaxyl-m-sensitive isolate of P. erythroseptica from New Brunswick was applied either in-furrow as a vermiculite slurry at planting or as a zoospore drench in soils adjacent to potato plants in late August. After harvest, the number and weight of tubers showing pink rot symptoms were assessed and expressed as percentages of the total tuber number and total weight of tubers. Metalaxyl-m applied in-furrow was significantly more effective against pink rot than phosphite. The mean percentage of diseased tubers as a percentage of total tuber weight was 1.5% (2005) and 1.2% (2006) for metalaxyl-m-treated plots and 9.6% (2005) and 2.8% (2006) for phosphite-treated plots, a percentage similar to that obtained in inoculated control plots with no fungicide treatment. The mean percentage of diseased tubers expressed as a percentage of the total number of tubers was 1.7% (2005) and 1.3% (2006) for metalaxyl-m-treated plots and 10.1% (2005) and 3.1% (2006) for phosphite-treated plots. Disease incidence was significantly higher using the late-season inoculation technique (respective means in 2005 and 2006 were 9.9 and 3.8% diseased tubers, by weight, and 10.6 and 3.9%, by number) than with the in-furrow inoculation method (respective means in 2005 and 2006 were 3.3 and 0.7% by weight, and 3.7 and 1.3%, by number). The potato cv. Shepody was significantly more susceptible to pink rot (9.9 and 3.3% diseased tubers, by weight, in 2005 and 2006, respectively, and 10.6 and 3.9%, by number) than Russet Burbank (respective means in 2005 and 2006 were 3.4,% and 1.2%, by weight, and 3.7,% and 1.2%, by number). Our findings indicate that metalaxyl applied in-furrow at planting is a viable option for control of pink rot caused by metalaxyl-sensitive strains of P. erythroseptica, whereas phosphite was ineffective.

Cylindrocladium root rot in Ontario bare-root nurseries: estimate of spruce seedling losses

1988 ◽  
Vol 18 (11) ◽  
pp. 1493-1496 ◽  
Author(s):  
J. Juzwik ◽  
C. Honhart ◽  
N. Chong
Keyword(s):  
Visual Field ◽  
Root Rot ◽  
Disease Incidence ◽  
White Spruce ◽  
Visual Assessment ◽  
Inoculum Density ◽  
Field Assessment ◽  
Causal Fungus ◽  
Bare Root ◽  
Apparently Healthy

Estimates of cylindrocladium root rot losses in three black and three white spruce compartments at five Ontario bare-root nurseries were determined through visual field assessment and seedling isolation. The causal fungus, Cylindrocladiumfloridanum Sob. & C.P. Seym., was isolated from 10–77% of the symptomatic and 0–28% of the apparently healthy seedlings in each compartment. In five compartments, estimates of mean incidence based on seedling isolations and visual assessment, were higher than those based on visual assessment alone. The percentage of living spruce (apparently healthy or symptomatic) estimated to be infected in each compartment was 0.1–32.7%. No fungus isolations were attempted from dead seedlings. Mortality in the plots in the six compartments was 0.02–17.7%. The correlation between the level of Cylindrocladium incidence and the inoculum density was significant (p < 0.01) in two compartments. The use of inoculum density to predict disease incidence warrants further investigation.

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.

Spiroplasma kunkelii. [Distribution map].

2008 ◽  
Author(s):  
Keyword(s):  
Zea Mays ◽  
North America ◽  
South America ◽  
Central America ◽  
Geographical Distribution ◽  
Distribution Map ◽  
Mato Grosso ◽  
Spiroplasma Kunkelii ◽  
Mato Grosso Do Sul ◽  
New Distribution

Abstract A new distribution map is provided for Spiroplasma kunkelii Whitcomb, Chen et al. Bacteria. Hosts: maize (Zea mays), sweetcorn (Zea mays subsp. mays), teosinte (Zea mexicana) and perennial teosinte (Zea perennis). Information is given on the geographical distribution in North America (Mexico, USA, California, Florida, Louisiana, Michigan, Mississippi, Ohio, Texas), Central America and Caribbean (Belize, El Salvador, Guatemala, Honduras, Jamaica, Nicaragua, Panama), South America (Argentina, Bolivia, Brazil, Mato Grosso do Sul, Minas Gerais, Colombia, Paraguay, Peru, Venezuela).

Phomopsis elaeidis. [Distribution map].

1995 ◽  
Author(s):  
Keyword(s):  
South America ◽  
Central America ◽  
Geographical Distribution ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Solomon Islands ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Phomopsis elaeidis Punith. Hosts: oil palm (Elaeis guineensis). Information is given on the geographical distribution in AFRICA, Guinea, Nigeria, Tanzania, Zaire, ASIA, Malaysia, E. Malaysia, India, AUSTRALASIA & OCEANIA, Australia, NT, Solomon Islands, CENTRAL AMERICA, Dominica, SOUTH AMERICA, Ecuador.

Dendroctonus frontalis. [Distribution map].

2002 ◽  
Author(s):  
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
North America ◽  
Central America ◽  
Geographical Distribution ◽  
District Of Columbia ◽  
Dendroctonus Frontalis ◽  
Distribution Map ◽  
Pinus Spp ◽  
New Distribution

Abstract A new distribution map is provided for Dendroctonus frontalis Zimmermann Coleoptera: Scolytidae Attacks Pinus spp. Information is given on the geographical distribution in ASIA, Israel, NORTH AMERICA, Mexico, USA, Alabama, Arizona, Arkansas, California, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia, CENTRAL AMERICA & CARIBBEAN, Belize, E! Salvador, Guatemala, Honduras, Nicaragua.

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