Mycosphaerella citri. [Descriptions of Fungi and Bacteria].

1976 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Geographical Distribution ◽  
Living Cells ◽  
Inoculum Source ◽  
Light Yellow ◽  
Black Spots ◽  
Leaf Surfaces ◽  
Yellow Orange ◽  
Fallen Leaves ◽  
Small Blister

Abstract A description is provided for Mycosphaerella citri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Citrus spp. DISEASE: Greasy spot of Citrus (black melanose or greasy melanose); greasy spot rind blotch has been proposed to cover all the symptoms on fruits (52, 1145). The leaves bear small blister like areas, mostly hypophyllous; these spots are at first a translucent, light yellow orange, becoming necrotic. In the field they resemble irregular flecks of dirty grease on both leaf surfaces. Most of the leaf may be affected and infected leaves fall. Very small black spots are caused on the fruits, forming an unsightly blemish; they are accentuated by delayed colouring of the rind due to retention of chlorophyll in the adjacent living cells (50, 2280; 52, 1145). GEOGRAPHICAL DISTRIBUTION: USA (Florida.). The disease was known for many years in USA before its aetiology was determined (50, 1231); and had been erroneously attributed to Cercospora citri-grisea Fisher (40, 752). A similar (or identical) disease in Japan (48, 155) had been attributed to Mycosphaerella horii Hara (see Tanaka et al. ; Yamada). In Florida M. citri was considered to differ from M. horii (50, 1231; 51, 3364); the former has smaller ascospores which are not constricted at the septa. TRANSMISSION: Air-borne ascospores from fallen leaves are thought to be the most important inoculum source (50, 1231).

Pseudoperonospora cannabina. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
Downy Mildew ◽  
Geographical Distribution ◽  
Distribution Map ◽  
Plant Parasite ◽  
Water Films ◽  
Black Spots ◽  
Leaf Surfaces

Abstract A description is provided for Pseudoperonospora cannabina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cannabis ruderalis, C. saliva. DISEASE: Downy mildew of hemp; an obligately biotrophic plant parasite. Brown to black spots appear on lower leaf surfaces, and become covered with a light violet to grey felt, with corresponding yellow necrotic patches on upper surfaces. GEOGRAPHICAL DISTRIBUTION: Asia; China (Beijing, Jilin, Liaoning, Nei Menggu, Shanxi, Yunnan), India, Japan, Pakistan, USSR (Azerbaijan, Kirghizia, Uzbekistan). Europe; France, Hungary, Italy, Poland, Portugal, Rumania, Switzerland, USSR (Estonia, Latvia, Lithuania, RSFSR, Ukraine). See IMI Distribution Map No. 478. TRANSMISSION: Presumably by sporangia dispersed in air, which germinate in water films on leaf surfaces, and by mycelium in infected seeds and planting stocks (42, 387).

Septoria lactucae. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Geographical Distribution ◽  
Seed Coat ◽  
Lactuca Sativa ◽  
Leaf Spot ◽  
Early Symptoms ◽  
Leaf Surfaces ◽  
A Minor

Abstract A description is provided for Septoria lactucae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Lactuca sativa. DISEASE: A minor leaf spot of lettuce (Lactuca sativa). Early symptoms are small, numerous, irregularly outlined, chlorotic spots beginning on the outer leaves. They enlarge, becoming brown or somewhat silvery, sometimes with a chlorotic halo, and shot-holes develop. Pycnidia, which may not be conspicuous, are found on both leaf surfaces. Infection spreads to the younger leaves and flowers in severe attacks (20: 193; 21: 182). GEOGRAPHICAL DISTRIBUTION: Widespread (CMI Map 485, ed. 1, 1972). TRANSMISSION: By seed, pycnidia can be found embedded in the seed coat (41: 267).

Protoventuria elegantula. [Descriptions of Fungi and Bacteria].

2016 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
British Columbia ◽  
North America ◽  
Geographical Distribution ◽  
Economic Impacts ◽  
Conservation Status ◽  
Fallen Leaves

Abstract A description is provided for Protoventuria elegantula (Gibbera elegantula). This species is apparently very mildly parasitic, found initially on living leaves, but not forming lesions, later on moribund, then dead fallen leaves, also on dead fruits. Some information on its associated organisms and substrata, habitats, dispersal and transmission and conservation status is given, along with details of its geographical distribution (North America (Canada (British Columbia), USA (Washington)), Europe (Austria, Finland, Germany, Italy, Norway, Sweden, Switzerland, UK)) and hosts (Vaccinium spp.). No reports of negative economic impacts of this fungus have been found.

Coccomyces clusiae. [Descriptions of Fungi and Bacteria].

2005 ◽  
Author(s):  
M. Cabarroi
Keyword(s):  
Puerto Rico ◽  
Costa Rica ◽  
Dominican Republic ◽  
Leaf Litter ◽  
Geographical Distribution ◽  
Disease Information ◽  
Fallen Leaves

Abstract A description is provided for Coccomyces clusiae, which is found on dead, fallen leaves in leaf litter. This species is not associated with any disease. Information is included on its geographical distribution (Costa Rica, Cuba, Dominican Republic, Guadeloupe, Haiti, Puerto Rico, Colombia, Guyana and Venezuela) and hosts (dead leaves of Clusia rosea and Clusia sp.).

Lophodermium balaramii. [Descriptions of Fungi and Bacteria].

2018 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Geographical Distribution ◽  
Conservation Status ◽  
Himachal Pradesh ◽  
Fallen Leaves ◽  
Rhododendron Campanulatum

Abstract A description is provided for Lophodermium balaramii found on dead fallen leaves and petioles of Rhododendron campanulatum. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (India (Himachal Pradesh)) and host (R. campanulatum).

Melampsora lini. [Descriptions of Fungi and Bacteria].

1965 ◽  
Author(s):  
G. F. Laundon
Keyword(s):  
Geographical Distribution ◽  
Growing Season ◽  
Common Source ◽  
Linum Usitatissimum L ◽  
Light Yellow ◽  
Melampsora Lini ◽  
Orange Yellow ◽  
Sources Of Infection ◽  
North And South America ◽  
North And South

Abstract A description is provided for Melampsora lini. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Linum usitatissimum, L. catharticum and other species of Linum. The American Aecidium lini Dearness & House on L. virginianum differs from M. lini in having cupulate, not caeomoid, aecia. DISEASE: Flax rust. Characterized by light-yellow to orange-yellow sori containing pycnia and aecia on leaves and stems early in the growing season, followed by reddish-yellow uredia on leaves, stems and capsules during the growing season, and later, brown to black telia covered by the epidermis, chiefly on the stems. Causes serious damage to flax by weakening and disfiguring the fibres and reduces the quality and yield of linseed. GEOGRAPHICAL DISTRIBUTION: Africa, Asia, Australasia, Europe, North and South America. (CMI Map 68, 2nd Ed.) TRANSMISSION: Sporidia produced in the spring from teliospores over-wintering on crop refuse are the most common source of primary inoculum. Teliospores may also be carried on fragments of infected host tissue with the seed. Volunteer flax plants, including some wild species, may also serve as important sources of infection (Millikan, 1951), and provide a means of over-wintering of the uredial stage in New Zeland (32: 79).

Mycovellosiella phaseoli. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
J. Ingham
Keyword(s):  
Phaseolus Vulgaris ◽  
South America ◽  
Geographical Distribution ◽  
French Bean ◽  
Wind Dispersal ◽  
Leaf Surfaces ◽  
Severe Infections ◽  
Yellow Mottling

Abstract A description is provided for Mycovellosiella phaseoli. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Phaseolus vulgaris, the french bean. DISEASE: Floury spot of bean or Mancha harinosa. The name derives from the white tufty growth of the fungus on the lower leaf surfaces. Yellowish spots develop on the leaves and in severe infections these appear as a yellow mottling. In old infections the spots become brown with a yellow margin. Infection is confined to the leaves and progresses upwards from the base where it can cause severe defoliation (37, 749). GEOGRAPHICAL DISTRIBUTION: Africa, Asia, Europe, South America (CMI Map No. 436, ed. 2, 1977). TRANSMISSION: By wind dispersal of air-borne conidia.

scholarly journals Extent of variability in fruit morphological characters of local mango germplasm

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Gurbir Singh ◽  
Sukhdev Singh
Keyword(s):  
Mangifera Indica ◽  
Morphological Characters ◽  
Fruit Shape ◽  
Fruit Colour ◽  
Light Yellow ◽  
Greenish Yellow ◽  
Orange Yellow ◽  
Fruit Skin ◽  
Yellow Orange ◽  
Medium Type

  A study was conducted on twenty five genotypes of seedling Mangoes to examine fruit morphological characters. Fruit shape of the evaluated germplasm varied enormously and fruits of obovoid, elliptic, round and oblong shapes were found. Fruit apex shape in the evaluated plants was round, acute and obtuse. Depth of fruit stalk cavity was either absent, shallow and of medium type, whereas, fruit neck prominence was absent to slightly prominent in the tested plants. Shape of fruit ventral shoulder was varied and found to be slopping abruptly, rising and then rounded and long curve type in the evaluated germplasm. Fruit beak varies from pointed to perceptible type and fruit sinus was absent to shallow type in the fruits from different plants. Fruit attractiveness varies from very good to excellent and fruit colour from greenish yellow to green colour of fruit skin at maturity was noted in fruits from selected trees. Peel colour of AA-15 was different amongst all the genotypes which were green with red blush. Pulp colour varied from light orange, yellow orange, orange yellow, yellow and light yellow, whereas, pulp texture was soft to intermediate in the evaluated germplasm. Key words: Mangifera indica; Genotype susceptibility; Punjab; India.  

A new distinctively banded species of Pseudolithoxus (Siluriformes: Loricariidae) from the upper Orinoco River

Zootaxa ◽  
2011 ◽  
Vol 2941 (1) ◽  
pp. 38 ◽  
Author(s):  
NATHAN K. LUJAN ◽  
JOSE L. O. BIRINDELLI
Keyword(s):  
New Species ◽  
Type Material ◽  
Caudal Fin ◽  
Orinoco River ◽  
Light Yellow ◽  
Black Spots ◽  
White Spots ◽  
Amazonas State ◽  
A New Species ◽  
Fish Distributions

Pseudolithoxus kelsorum is described as a new species based on type material from the upper Orinoco in Amazonas State, Venezuela. Pseudolithoxus kelsorum is diagnosed from all other Pseudolithoxus by having dark brown to black base color with eight to 11 (usually nine) light yellow vertical or oblique transversal bands between orbits and caudal fin, bands wide and rarely but sometimes incomplete or contorted as swirls (vs. dark brown to black base color with 18 or more thin, light yellow, frequently contorted transversal bands between orbits and caudal fin in P. tigris; black base color with small white spots in P. anthrax and P. nicoi; and light brown base color with dark brown to black spots in P. dumus). Distributions of P. kelsorum and other Ancistrini taxa support the presence of a zoogeographic filter limiting fish distributions across a reach of the Orinoco River between the Ventuari-Orinoco confluence and the Maipures rapids.

Isolation and characterization of starch from light yellow, orange, and purple sweet potatoes

2020 ◽  
Vol 160 ◽  
pp. 660-668 ◽  
Author(s):  
Honglu Wang ◽  
Qinghua Yang ◽  
Uzizerimana Ferdinand ◽  
Xiangwei Gong ◽  
Yang Qu ◽  
...  
Keyword(s):  
Sweet Potatoes ◽  
Light Yellow ◽  
Isolation And Characterization ◽  
Yellow Orange
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