Pyrenochaeta lycopersici. [Descriptions of Fungi and Bacteria].

Author(s):  
E. Punithalingam

Abstract A description is provided for Pyrenochaeta lycopersici. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lycopersicon esculentum; also on Capsicum and Nicotiana. DISEASE: Brown root rot or corky root of tomato (Lycopersicon esculentum). In Europe it seems to occur only in crops grown in close succession under glass. The plants lack vigour, become stunted and give poor yields. There is a cortical rot of the fine and medium sized roots; larger roots become corky with swollen, cracked and furrowed bark, almost canker-like; finally the stem base may rot. GEOGRAPHICAL DISTRIBUTION: Canada, Belgium, France, Germany, Italy, Netherlands, New Zealand, Rumania, Scandinavia, UK (24, 78; 42, 491; 50, 3178; Last et al, NAAS Quarterly Review 62: 68, 1963). TRANSMISSION: Soil-borne. This fungus occurs in a sterile mycelial state within corky root of tomatoes and pycnidia have not been found in the natural state.

Author(s):  
C. Booth

Abstract A description is provided for Micronectriella nivalis[Monographella nivalis]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: The fungus is a serious pathogen of cereals (barley, wheat, rye) and grasses, especially in temperate regions where it may cause total loss of winter sown wheat and rye (43, 1873; 48, 3456). Tropical records, especially those on rice, need to be confirmed. DISEASE: Pre-emergence blight, root rot and occasionally head blight of cereals. Snow mould of turf. GEOGRAPHICAL DISTRIBUTION: Europe, extremely widespread, USSR, Japan, Australia, New Zealand, N.E. and N.W. USA and Canada. Records have also been cited of its occurrence in India and West Africa (CMI Map 432, ed. 1, 1967). TRANSMISSION: By seed, soil, water and in summer by aerial dissemination of ascospores (48, 1628).


Author(s):  
A. Peerally

Abstract A description is provided for Cylindrocladium clavatum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Araucaria angustifolia, Camellia sinensis, Eucalyptus saligna and Pinus. DISEASE: Occasionally associated with Cylindrocladium floridanum[Calonectria kyotensis] and Cylindrocarpon tenue on rotting roots of unthrifty tea bushes in Mauritius. Associated with a root disease of dying 10-15 year old trees of Araucaria angustifolia (Hodges & May, 1972). Roots of such trees are pitch-soaked and copiously exude resin, causing large quantities of soil to stick to the roots, thus resembling in symptomatology the brown root rot caused by Phellinus noxius. Also isolated from the roots of dying trees of several species of Pinus (Hodges & May, 1972). The pine needles on affected trees turn bright yellow, droop and finally turn brick red. Roots were pitch-soaked but resin exudation was slight. Also isolated from seedlings of Eucalyptus saligna (Hodges & May, 1972). GEOGRAPHICAL DISTRIBUTION: Brazil, Mauritius. TRANSMISSION: The pathogen is soil-borne.


Plant Disease ◽  
2019 ◽  
Vol 103 (5) ◽  
pp. 1032
Author(s):  
A. L. Testen ◽  
A. Chala ◽  
F. Azerefegne ◽  
S. A. Miller

Author(s):  
G. M. Waterhouse

Abstract A description is provided for Phytophthora citricola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Antirrhinum majus, Brachychiton populneum, Ceanothus sp., Citrus spp., Erica hiemalis, Hibiscus spp., Humulus lupulus, Lycopersicon esculentum, Malus pumila, Primula japonica, Rhododendron catawbiense, Ribes grossularia, Rosa sp., Rubus idaeus, Schinus moue and Syringa vulgaris. Also pathogenic on inoculation to: Chamaecyparis sp., Cupressus sp., Cydonia oblonga, Euphorbia resinifera, Lycopersicon esculentum, Malus pumila, Phaseolus vulgaris and Pinus sp. (Waterhouse, 1957; 39: 249; 40: 433; Herb. IMI.) DISEASES: Brown rot of oranges, black root of hops, root rot and cane die-back of raspberry, die-back of rhododendron and basal rot of tomato seedlings. GEOGRAPHICAL DISTRIBUTION: Africa (South Africa); Asia (Formosa), Australasia & Oceania (Australia, New Zealand); Europe (Great Britain, Germany, Italy (Sicily)); Central America & West Indies (Antilles); North America (U.S.A.); South America (Argentina). TRANSMISSION: Soil-borne. Survives as mycelium in host roots and as oospores in soil (45, 3381b). Also intercepted once in Czechoslovakia on oranges imported from Turkey (42: 197).


Author(s):  

Abstract A new distribution map is provided for Pseudomonas syringae pv. tomato (Okabe) Young, Dye & Wilkie. Hosts: tomato (Lycopersicon esculentum), chilli (Capsicum annuum). Information is given on the geographical distribution in AFRICA, Egypt, Morocco, South Africa, ASIA, India, Tamil Nadu, Israel, Japan, Jordan, Taiwan, Turkey, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Bulgaria, former Czechoslovakia, France, Germany, Greece, Hungary, Italy, Poland, Portugal, Romania, Russia, Spain, Switzerland, UK, Jersey, former Yugoslavia, NORTH AMERICA, Canada, USA, SOUTH AMERICA, Brazil, Sao, Paulo, Minas, Gerais, Pernambuco, Chile, Venezuela.


Author(s):  
D. J. Stamps

Abstract A description is provided for Phytophthora primulae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Primula, parsley. DISEASE: Brown core root rot of Primula. GEOGRAPHICAL DISTRIBUTION: Australasia (New Zealand), Europe (Denmark, UK). TRANSMISSION: Soil-borne carried from Primula seedling boxes to the field in soil adhering to roots or in roots of young plants (32, 315).


Author(s):  
J. E. M. Mordue

Abstract A description is provided for Pestalotiopsis funerea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Coniferae, including Araucaria, Cedrus, Chamaecyparis, Cryptomeria, Cupressocyparis, Cupressus, Dacrydium, Ginkgo, Juniperus, Libocedrus, Pinus, Pseudotsuga and Thuja. DISEASE: Leaf and stem blight, occasionally canker or girdling, dieback and root-rot. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Italy, Romania, Spain, Netherlands, Belgium); Africa (S. Africa, Kenya, Rhodesia, Tanzania, Zaire, Zambia); Asia (USSR, Japan); Australasia (Australia, New Zealand); America (Canada, Ecuador, USA, Bermuda). TRANSMISSION: Has been found in seed samples (35, 643) and isolated from soil, but no detailed studies have been reported.


Author(s):  
G. Hall

Abstract A description is provided for Pythium erinaceum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lupinus sp., Triticum aestivum. DISEASE: Possibly associated with a root rot complex of wheat; a facultatively necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: Australasia & Oceania; Australia (NSW), New Zealand. TRANSMISSION: Presumably by zoospores in moist soil. Oospores may act as perennating structures.


Author(s):  

Abstract A new distribution map is provided for Pseudomonas corrugata Roberts & Scarlett. Hosts: Tomato (Lycopersicon esculentum). Information is given on the geographical distribution in AFRICA, South Africa, AUSTRALASIA & OCEANIA, New Zealand, EUROPE, Denmark, England, Germany, Italy, Portugal, NORTH AMERICA, USA.


Author(s):  
B. C. Sutton

Abstract A description is provided for Mycocentrospora acerina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: A very wide host range (29, 364); parsley, celery, carrot and parsnip are among the most important economically. DISEASE: Pansy leaf spot; celery storage rot; root rot, canker and black crown rot of parsnip; liquorice rot of carrot. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Ireland, Germany, Czechoslovakia, Netherlands, Poland, Rumania, USSR, Denmark); N. America (USA, Canada); Australia, New Zealand. TRANSMISSION By splash dispersed conidia; these are viable for short periods only (26, 133). Survival for longer periods is by infected debris and chlamydospores in the soil (23, 324; 45, 681; 52, 899). Water-borne spread is possible (49, 1526) and transmission on pansy seeds has been demonstrated (51, 422).


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