Showing 7 results for Beet
Gildana Moayedi1 , Reza Mostowfizadeh-Ghalamfarsa,
Volume 1, Issue 2 (9-2012)
Abstract
Trichoderma form-species are among of the important antagonists of plant pathogenic fungi and also induce resistance in field crops. Therefore their isolation and identification could be helpful for applying them in biological control. They isolate by pour soil diluted suspension on Dawet, Peptone – Rose Bengal, or modified Potato- Dextrose-Agar mediums. Species can identify based on colony characteristics, growth characteristics and morphological characteristics of conidiophores, phialids, and conidia. Eighty-five isolates of Trichoderma from 25 soil samples, from 8 regions of the Fars province sugar beet fields, isolated and purified with this method. With studied their characteristics eight form-species of Trichoderma identified with names: T. asperellum, T. atroviride, T. brevicompactum, T. harzianum, T. longibrachiatum, T. spirale, T. tomentosum and T. virens . Methods of isolation, identification and morphological characteristics of these fungi described.
Mehdi Sadravi,
Volume 2, Issue 1 (3-2013)
Abstract
Powdery mildew fungi are important obligate parasites of plants. They produce white cover on aerial parts of host plants, which then turn to yellow. The diseased plant becomes yellow and then wilted result in reducing quality as well as quantity of products in field and vegetable crops and also fruit trees. Among all of the control measures against powdery mildew, the most common method is application of the chemical fungicides, after disease incidence. Regarding to the hazards of agrochemicals and also considering the probability of incidence of resistant races of the pathogen, the biological control is considered as a safe and useful method for controlling the disease. The fungi Ampelomyces quisqualis, Pseudozyma flocculosa and Lecanicillium longisporum the bacterium Bacillus subtilis the mite Tydeus lambi and twenty-spotted lady beetle Psyllobora vigintimaculata , have been used effectively against the powdery mildew of cucumber, squash, tomato, pepper, grape and rose. Some of these biological agents have been introduced to the market, commercially.
Mehdi Nasr Esfahani , Mohammad Ali Karimkhah,
Volume 2, Issue 2 (9-2013)
Abstract
Powdery mildew disease of beet, cause by the fungus Erysiphe polygoni, is highly epidemic on table beets which are mostly cultivated in cooler regions of Isfahan province. Severity of the disease in fodder beets is lower than that of table beets. Studies on this fungus revealed that there is ascocarp formation as yellow spots which then turned to light to dark brown and then to black spherical bodies on upper, lower and petiols of the leaves, at the end of the season. Asci contain ellipsoid ascospores . Disease symptoms, characters of the pathogen and methods of disease management are described.
Somayeh Mousavi, Mahdi Arzanlou,
Volume 5, Issue 2 (8-2016)
Abstract
Mousavi S. & Arzanlou M. 2016. Cercospora leaf spot disease of sugar beet. Plant Pathology Science 5(2):13-22.
Cercospora leaf spot disease is one of the most important foliar diseases of sugar beet. Over one third of the sugar beet cultivation areas of the world has been affected by this disease. Cercospora beticola is the causal agent of this disease and a high level of interspecific variation of its morphology and genetics has been reported. Disease management is mainly achieved by a combination of cultural practices, cultivation of resistant varieties and application of fungicides. Due to the economic importance of the disease in Iran, some of the different aspects of Cercospora leaf spot disease, including the introduction of disease as well as the biology of the fungus, disease cycle and the efficient measures of disease management, has been reviewed in this paper.
Leila Motieeian, Mehdi Nasr Esfahani,
Volume 5, Issue 2 (8-2016)
Abstract
Motieeyan L. & Nasr-Esfahani M. 2016. Management method of sugar beet cyst nematode. Plant Pathology Science 5(2):32-41.
Sugar beet, is one of the basic source of the raw material for sugar industry in Iran. The beet cyst nematode, Heterodera schachtii Schmidt, 1871, is one of the most damaging pathogens of sugar beet. This nematode has a wide host range, including 218 plant species from 95 genus and 23 families, which include some of the important field crops, ornamental plants and weeds. Nematode management methods include avoiding of cultivation in highly infested soils, disease scape by early cultivation, crop rotation, using resistant varieties, application of bioagents, applying of organic fertilizers, animal manure, plant waste materials, compost, vermicompost and also soil solarization and chemical control are described here.
Mounes Bakhshi,
Volume 7, Issue 1 (3-2018)
Abstract
Bakhshi M. 2018. Important criteria for identification of the Cercospora species. Plant Pathology Science 7(1):1-14.
Species of the genus Cercospora are important plant pathogenic fungi with worldwide distribution. They are often associated with leaf spots, occurring on a wide range of hosts in almost all major families of dicots, most monocot families, and even some gymnosperms and ferns. Different characteristics, such as morphology, toxin production and host specificity were used to distinguish species. New research findings have shown that a polyphasic approach, combining morphological, ecological and phylogenetic species concepts, which are discussed in this article, proved the most effective method to distinguish species of the genus Cercospora. Accurate identification of these plant pathogens is the first step to adopt the appropriate management strategies for their disease control. Therefor, it is recommended that, in order to accurate identification of the species of the genus Cercospora, they should be studied and reviewed on the basis of these criteria.
Marzieh Mehrabioun Mohammadi, Narges Ahmadi, Mahdi Arzanlou,
Volume 9, Issue 1 (3-2020)
Abstract
Mehrabioun Mohammadi M, Ahmadi N, Arzanlou M (2020) Dutch elm disease. Plant Pathology Science 9(1):91-100. DOI: 10.2982/PPS.9.1.91.
Elm trees are one of the most important ornamental trees and are widely used in the design of urban green spaces. Dutch elm disease is recognized as one of the most important elm diseases in the world. The disease has become an epidemic worldwide and at least three species of Ophiostoma including O. ulmi, O. novo-ulmi and O. Himal-ulmi that differ in geographical distribution and invasion power, are involved in this disease. In Iran, O. ulmi and O. novo-ulmi are known to involve in this disease, with O. novo-ulmi being more virulent. Management of the disease is mainly achieved through preventive and quarantine methods, health measures, resistant cultivars and the use of chemical compounds. Various aspects of the disease, including disease symptoms and signs, pathogen biology and ecology, disease management methods are reviewed in this paper.
