Five decades of research on phytoplasma-induced witches' broom diseases.

2021 ◽  
Vol 16 (002) ◽  
Author(s):  
Chamran Hemmati
Keyword(s):  
Plant Species ◽  
Ornamental Plants ◽  
Fruit Trees ◽  
The Other ◽  
Economic Losses ◽  
Common Disease ◽  
Vegetable Crops ◽  
Management Options ◽  
Disease Symptoms ◽  
Broom Disease

Abstract Phytoplasmas, prokaryotic wall-less microorganisms, are important pathogens of several plant species in most parts of the world. Phytoplasmas have been reported associated with various symptoms on hundreds of plant species. Witches' broom disease (WBD) is one of the most common disease symptoms, which is caused by phytoplasma strains belonging to different phytoplasma groups. Symptoms of the disease differ from one host to the other as well as from one phytoplasma strain to the other. However, WBD symptoms are usually characterized by the production of a large number of small leaves, accompanied in some host plants by the production of several branches/shoots. Phytoplasma strains belonging to more than 13 groups and 39 subgroups have been reported associated with WBD in more than 116 plant species. Most of the phytoplasma strains causing WBD symptoms in plant species belong to the 16SrII and 16SrI groups, mainly 16SrII-D and 16SrI-B subgroups. The current review provides information on the different types of phytoplasma strains associated with WBD symptoms in ornamental plants, medicinal plants, forest trees, weeds, vegetable crops, field crops, and fruit trees. Emphasis is on WBD on acid limes, almonds, peanuts, jujube, and cassava that have resulted in significant economic losses in different countries. Description of the symptoms, phytoplasma groups, and management options is also provided for some of the diseases.

THE OCCURRENCE OF FUSARIUM SPECIES IN CANADA: VI. TAXONOMY AND GEOGRAPHIC DISTRIBUTION OF FUSARIUM SPECIES ON PLANTS, INSECTS, AND FUNGI

1959 ◽  
Vol 37 (2) ◽  
pp. 257-290 ◽  
Author(s):  
W. L. Gordon
Keyword(s):  
Geographic Distribution ◽  
Fusarium Species ◽  
Ornamental Plants ◽  
The Other ◽  
Vegetable Crops ◽  
Fruit Crops ◽  
Field Crops ◽  
First Time ◽  
Trees And Shrubs ◽  
Botanical Varieties

The present investigation was commenced in 1932 and has been continued annually since that time with the object of determining the identity, host range, and geographic distribution of the Fusarium species in Canada. Approximately 9000 isolates of Fusarium were studied. These isolates were obtained from 173 species and botanical varieties of plants, 14 species of insects, and 4 of fungi. Of the various species and botanical varieties of plants from which isolates were obtained, 19 were cereals and grasses, 19 were vegetable crops, 15 were fruit crops, 13 were field crops, 52 were ornamental plants, 31 were trees and shrubs, and 24 were common weed plants. Less than 1% of the total isolates was obtained from insects and fungi. Although most of the isolates originated in Manitoba, some were obtained from each of the other provinces of Canada except Newfoundland.A total of 18 species, 3 varieties, and 18 formae of Fusarium, classified in nine sections of the genus, were identified among the isolates from plants, insects, and fungi. These species, varieties, and formae are: F. chlamydosporum Wr. & Rg., F. poae (Pk.) Wr., F. sporotrichioides Sherb. (section Sporotrichiella); F. arthrosporioides Sherb., F. avenaceum (Fr.) Sacc. (Roseum); F. concolor Rg., F. semilectum Berk. & Rav. (Arthrosporiella); F. acuminatum (Ell. & Ev.) Wr., F. eauiseti (Cda.) Sacc. (Gibbosum); F. culmorum (W. G. Sm.) Sacc, F. graminearum Schwabe, F. heterosporum Nees emend. Raillo, F. sambucinum Fuckel, F. samb. var. coeruleum Wr., F. samb. f. 6 Wr. (Discolor); F. moniliforme Sheld., F. moniliforme var. subglutinans Wr. & Rg. (Liseola); F. lateritium Nees (Lateritium); F. oxysporum Schl. emend. S. & H., F. oxysporum var. redolens (Wr.) Gordon, F. oxysporum f. betae (Stewart) S. & H., f. callistephi (Beach) S. & H., f. cepae (Hanz.) S. & H., f. conglutinans (Wr.) S. & H., f. dianthi (Prill. & Del.) S. & H., f. fabae Yu & Fang, f. gladioli (Massey) S. & H., f. lilii Imle, f. lini (Bolley) S. & H., f. lycopersici (Sacc.) S. & H., f. melonis S. & H., f. narcissi S. & H., f. pini (Hartig) S. & H., f. tuberosi S. & H. (Elegans); F. solani (Mart.) App. & Wr. emend. S. & H., F. solani f. eumartii (Carp.) S. & H., f. phaseoli (Burk.) S. & H., f. pisi (Jones) S. & H., F. coeruleum (Lib.) Sacc. (Martiella).F. chlamydosporum, F. heterosporum, F. moniliforme var. subglutinans, as well as 14 formae of F. oxysporum and 3 formae of F. solani, are reported to occur in Canada for the first time in this series of papers.The six species isolated most commonly, as indicated by the number of hosts from which they were obtained, are F. oxysporum, F. acuminatum, F. solani, F. equiseti, F. avenaceum, and F. poae.The conidia and chlamydospores of F. chlamydosporum and F. heterosporum are illustrated by drawings.

scholarly journals The Promotion of Beekeeping and Bee Product and By-Product Development at PSAU, Philippines

2020 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Norman De Jesus
Keyword(s):  
Ornamental Plants ◽  
Fruit Size ◽  
Fruit Trees ◽  
Wild Plants ◽  
Farm Size ◽  
Vegetable Crops ◽  
Tropical Fruit ◽  
Global Trends ◽  
Hands On ◽  
By Products

The study is divided into two components, namely; the beekeeping status and contribution of bees as pollinators and the development of its by-products.  The first component is on documentation of existing beekeeping activity and honey utilization in Region III; Inventory of bee plants surrounding Mt. Arayat and the contribution of the honeybee as pollinators to selected tropical fruit trees and vegetable crops. The second component, which is on the development of products and by-products came up with a honey wine formulation and eight wellness products. The general objective of this project is to promote beekeeping, its products, and by-products developed among various communities in the vicinity of Mt. Arayat and nearby municipalities of Pampanga. Beekeepers are members of the Beekeeper Association, Luzon Chapter. The type of race usually found in the research places is Apis millifera where the number of colonies of the Beekeepers ranges from 4 to 48. The farm size for beekeeping ranges from 1000 to 5000sq.m. Beekeepers observed proper hive placement, density, water, and management. As to training needs the beekeepers said that they need training on the global trends in beekeeping, a quality race of bees (queen) and packaging technology for honey. Eight forest trees, 12 vegetables, five field crops, 13 fruit trees, six ornamental plants, and four wild plants have so far been identified and were found within PAC surroundings and vicinity of Mount Arayat. These plants varied in their flowering time which makes them good sources of nectar and pollen all year round for the honeybees. There are plants bearing either nectar or pollen, and there are also plants that possess both the nectar and pollen. The study showed that honeybees could affect the fruit size and harvest of cashew, squash, cucumber, and tamarind fruits. The honey wine developed is very much acceptable in terms of appearance, aroma, and taste. The wellness products were very effective in the specific study conducted such as acne, wound healing, and rashes, among others. There were about 500 individuals who were afforded with either of the following technology transfer: hands-on training, seminar, orientation and the likes

scholarly journals Distribution and Host Range of the Burrowing Nematode in Puerto Rican Soils

1969 ◽  
Vol 47 (1) ◽  
pp. 28-37
Author(s):  
Alejandro Ayala ◽  
Jessé Román
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Host Range ◽  
Plant Species ◽  
Root Rot ◽  
Ornamental Plants ◽  
The State ◽  
The Other ◽  
Burrowing Nematode

Because of quarantine recently established by the State of California on ornamental material imported from Puerto Rico, Hawaii, and Florida, a study was undertaken in 1955, which lasted until 1960, to determine the distribution of the burrowing nematode in Puerto Rico. Six of the most important ornamental nurseries and several localities in which economic important crops are grown were sampled. Eight different ornamental plants were found infected with burrowing nematodes in three of the nurseries. The nematode was found to be widely distributed and a serious problem in one of the nurseries, where it was presumably introduced with infected banana material. In the other two the nematode was present in limited numbers only and infected very few plants. The nematode was well distributed in banana and plantain, in which it caused a root rot condition that usually destroyed whole plantations. The distribution of the nematode and symptoms caused to these crops are discussed. Coffee and noncultivated cotton were also found to be attacked by the nematode. Five of the twelve plant species here reported as hosts of the burrowing nematode in Puerto Rico are probably newly reported hosts.

scholarly journals Salt tolerance of sweet pepper seedlings

2002 ◽  
Vol 8 (2) ◽  
Author(s):  
K. Slezák ◽  
I. Terbe ◽  
N. Kappel ◽  
K. Tóth
Keyword(s):  
Salt Tolerance ◽  
Plant Species ◽  
Filter Paper ◽  
Sweet Pepper ◽  
The Other ◽  
Vegetable Crops ◽  
Soil Mixture ◽  
Parallel Tests

Laboratory germination tests have been made with three white fruit pepper varieties and with one spice pepper in filter paper rolls wetted with KCl solutions of different concentration. Parallel tests have been conducted with the other species (lettuce, tomato, kohlrabi) to compare the salt tolerance of paprika with that of other vegetable crops. In greenhouse, the action of KCl has been investigated with transplants raised in soil mixture, in rockwool and with seedlings transplanted from rockwool into soil mixture. Like the trials in the laboratory, the experiments in soil mixture have been made with other plant species, too.

scholarly journals Jackfruit trees as seed attractors and nurses of early recruitment of native plant species in a secondary forest in Brazil.

2021 ◽  
Author(s):  
Milena Gomes ◽  
Eliana Cazetta ◽  
Ricardo Bovendorp ◽  
Deborah Faria
Keyword(s):  
Exotic Species ◽  
Plant Species ◽  
Native Species ◽  
Secondary Forest ◽  
Fruit Trees ◽  
Seed Rain ◽  
Native Plant ◽  
Management Options ◽  
Native Plant Species ◽  
Early Recruitment

Abstract The Atlantic Forest is one of the most threatened tropical forests in the world, being drastically reduced, fragmented and disturbed. The drastic process of anthropic occupation and exploitation of this biome has, in many cases, led to the introduction of exotic species, such as the jackfruits (Artocarpus heterophyllus). However, studies on the influence of jackfruits on the native biota are still scarce. Here we investigated the influence of fruit trees on the seed rain and early recruitment of seedlings in native remnants, comparing these patterns with those observed for a native species tapirira (Tapirira guianensis), which similarly to jackfruits, produces many fruits thruought the year, attracting a variety of frugivore species. Seed rain and seedlings observed under the jackfruits were both more abundant and equally rich to the assemblages reported under the native tapirira trees. In both species, co-specifics comprise a large part of the number of seeds (> 70%) and seedlings (> 45%) individuals and, although they attract similar seed assemblages, seedling composition diverge, particularly when co-specifics are excluded. We reported that jackfruits can attract a diverse seed and seedling assemblages, and we find no evidence that the presence of jackfruits negatively affects the arrival and initial recruitment of native plant species in the study area. These results should be analysed with caution but considered when evaluating costs and benefits of management options to control exotic species.

Some Ornamental Plant species of Tarai region of Kumaun, Uttarakhand

2014 ◽  
Vol 37 (2) ◽  
pp. 207-212
Author(s):  
Anjali Mathur ◽  
Hema Joshi
Keyword(s):  
Plant Species ◽  
Ornamental Plants ◽  
Ornamental Plant ◽  
The Other ◽  
Religion And Science ◽  
Number Of Plant Species

The present study was conducted in the central tarai region of Kumaun, Uttarakhand in the year 2008-2011.The study area located in Lalkuan, Kichha and Pantnagar. Sixty three ornamental plant species were found during study period which is also used as utilitarian. The number of plant species which was introduced from the other native places was 47. Ornamental plants play important roles in society, religion and science.

Ahara as Pathya and Apathya in Amlapitta - A Review.

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Rakshith . ◽  
Shivakumar . ◽  
Sreeharsha . ◽  
Divyasree .
Keyword(s):  
Physical Health ◽  
Review Article ◽  
The Other ◽  
Social Health ◽  
Present Review ◽  
Common Disease ◽  
The Core ◽  
Common Disorder ◽  
The Common

The core principles in Ayurveda give prime importance to Agni, Prakriti, Ahara (food) and Vihara (lifestyle) in maintaining health. Present era people are scheduled to one or the other works due to which they are following unrightful food and habits which lead the manifestation of one of the common disorder which troubles person a lot - Amlapitta. By excess “Hurry, Worry and Curry” GIT disorders are the most common, not only affecting physical health but also psychological and social health. Amlapitta is one of that and it is a burning problem of the whole World. Amalpitta is composed of word Amla and Pitta. Amlapitta is a very common disease caused by Vidagdha Pitta with features like Amlodgara, Tiktodgara, Hrit, Kantha Daha etc. Pathya recommended in Amlapitta are Yava, Godhuma, Purana Shali, Mudga Yusha, Lajasaktu etc. Apathya recommended in Amlapitta are Navanna, Avidugdha, Masha, Kulattha, Dadhi and etc. So this present review article throws light on Pathya (conducive) and Apathya (non conducive) in Amlapitta.

scholarly journals First Report of Tomato chlorotic spot virus in Hoya wayetii and Schlumbergera truncata

2015 ◽  
Vol 16 (1) ◽  
pp. 29-30 ◽  
Author(s):  
Carlye A. Baker ◽  
Scott Adkins
Keyword(s):  
Plant Species ◽  
Vegetable Crops ◽  
Spot Virus ◽  
First Report ◽  
Chlorotic Spot ◽  
Production Space ◽  
Related Plant ◽  
Diverse Plant Species ◽  
Diverse Plant

To the best of our knowledge, this is the first report of TCSV infection of H. wayetii and S. truncata from any location, although other tospoviruses are known to infect these and related plant species. The identification of these two diverse plant species as the first reported natural ornamental hosts of TCSV has implications for TCSV epidemiology and management in ornamental and vegetable crops, which frequently share production space. Accepted by publication 15 January 2015. Published 25 February 2015.

scholarly journals THE GRASS IS ALWAYS GREENER ON THE OTHER SIDE OF THE FENCE: THE FLORA IN URBAN BACKYARDS OF DIFFERENT SOCIAL CLASSES

2017 ◽  
Vol 20 (1) ◽  
pp. 1-20 ◽  
Author(s):  
FABIO ANGEOLETTO ◽  
JUAN PEDRO RUIZ SANZ ◽  
RICARDO MASSULO ALBERTIN ◽  
FREDERICO FONSECA DA SILVA
Keyword(s):  
Biodiversity Conservation ◽  
Plant Species ◽  
Plant Diversity ◽  
The Other ◽  
Social Classes ◽  
Metropolitan Region ◽  
Woody Vegetation ◽  
Endangered Plant ◽  
Diversity Patterns ◽  
Flora Diversity

Abstract Home gardens have considerable biodiversity conservation potential. However, these spaces are unplanned, and there is little information about the flora diversity in the backyards of different social classes. The current study has quantified and compared plant diversity in the backyards of two neighborhoods located in the metropolitan region of Maringá - RMM (Paraná, Brazil), namely, Conjunto Triangulo and Zona 02. The diversity patterns were markedly different when the neighborhoods were compared. Therefore the present study has set some planning guidelines aiming at increasing the presence of woody vegetation, as well as at contributing to biodiversity conservation, including the conservation of endangered plant species, in the backyards of the RMM.

scholarly journals Angolan vegetable crops have unique genotypes of potential value for future breeding programmes

2016 ◽  
Vol Volume 112 (Number 3/4) ◽  
Author(s):  
José P. Domingos ◽  
Ana M. Fita ◽  
María B. Picó ◽  
Alicia Sifres ◽  
Isabel H. Daniel ◽  
...  
Keyword(s):  
Strong Dependence ◽  
The Other ◽  
Vegetable Crops ◽  
Cucurbita Maxima ◽  
Capsicum Chinense ◽  
Local Markets ◽  
Potential Value ◽  
Wide Range ◽  
Different Types ◽  
Breeding Programmes

Abstract A survey was carried out in Angola with the aim of collecting vegetable crops. Collecting expeditions were conducted in Kwanza-Sul, Benguela, Huíla and Namibe Provinces and a total of 80 accessions belonging to 22 species was collected from farmers and local markets. Species belonging to the Solanaceae (37 accessions) and Cucurbitaceae (36 accessions) families were the most frequently found with pepper and eggplant being the predominant solanaceous crops collected. Peppers were sold in local markets as a mixture of different types, even different species: Capsicum chinense, C. baccatum, C. frutescens and C. pubescens. Most of the eggplant accessions collected belonged to Solanum aethiopicum L. Gilo Group, the so-called ‘scarlet eggplant’. Cucurbita genus was better represented than the other cucurbit crops. A high morphological variation was present in the Cucurbita maxima and C. moschata accessions. A set of 22 Cucurbita accessions from Angola, along with 32 Cucurbita controls from a wide range of origins, was cultivated in Valencia, Spain and characterised based on morphology and molecularity using a set of 15 microsatellite markers. A strong dependence on latitude was found in most of the accessions and as a result, many accessions did not set fruit. The molecular analysis showed high molecular variability and uniqueness in the collected accessions, as shown by their segregation from the set of global controls. In summary, the material collected is quite valuable because of its uniqueness and the potential of the breeding characteristics it possesses.

Sign in / Sign up

Export Citation Format

Share Document