scholarly journals Coniferous Diseases In The Andijan Region

2020 ◽  
Vol 02 (12) ◽  
pp. 1-4
Author(s):  
Nodira Kamiljanovna Siddikova ◽  
◽  
Mukaddam Kamiljanovna Mirzaitova ◽  
Keyword(s):  
Fusarium Oxysporum ◽  
Frequency Of Occurrence ◽  
Verticillium Dahlia ◽  
Adult Plants

The article provides data on the composition of diseases of decorative coniferous crops in the Andizhan region. In total, 11 species of micromycetes were identified. In the nursery, during the lodging of seedlings, species of the river were noted. Fusarium: Fusarium oxysporum Schlecht. and F. solani (Mart.) Sacc., Verticillium dahlia Klebn. By the frequency of occurrence, Fusarium blight was noted much more often. Lodging of seedlings was also caused by Pythium debaryanum Hesse. Among the diseases of adult plants, we have identified - rust juniper (exc. - Gymnosporangium confusum Plowr.), defeat of needles (phomosis, rust), shoots and branches (diplodiosis, phomosis). drying of needles and juniper shoots and black needles (Hormiscium pinophilum (Nees.) Lind., Fumago vagans Pers.).

Reactions of black bean seedlings and adult plants to infection by Fusarium oxysporum f. sp. phaseoli

2017 ◽  
Vol 96 ◽  
pp. 221-227 ◽  
Author(s):  
Marlon C. de Borba ◽  
Felipe R. Garcés-Fiallos ◽  
Marciel J. Stadnik
Keyword(s):  
Fusarium Oxysporum ◽  
Black Bean ◽  
Adult Plants

scholarly journals Fungal Diversity in the Rhizosphere and Rhizoplane of Okra (Abelmoschus esculentus L.) Moench. in Nsukka, Enugu State, Nigeria

2020 ◽  
pp. 14-22
Author(s):  
C. N. Onaebi ◽  
A. C. Okoro ◽  
E. Anyaogu
Keyword(s):  
Aspergillus Niger ◽  
Physicochemical Properties ◽  
Fusarium Oxysporum ◽  
Growth And Development ◽  
Fungal Diversity ◽  
Organic Matter Content ◽  
Penicillium Citrinum ◽  
Frequency Of Occurrence ◽  
Mucor Racemosus ◽  
Colony Forming Unit

Aim: The growth and development of economically important crops are usually affected positively or negatively by the microbes present in the rhizosphere and rhizoplane. Based on this, the study was carried out to determine the fungal diversity in the rhizosphere and rhizoplane of okra plant. Methods: Okra seeds were purchased from an agricultural shop in Nsukka main market and were planted at Botanic garden, Department of Plant Science and Biotechnology, University of Nigeria, Nsukka. Physicochemical properties of the soil sample were evaluated prior to planting and as the plant aged. Rhizosphere and rhizoplane samples were collected at two weeks interval and dilution plate method was used in fungi isolation after which they were identified. The frequency of occurrence and the colony forming unit per gram of the sample (cfu/g) were evaluated. Results: The Physicochemical properties of the soil samples fluctuated as plant aged at two weeks intervals. The pH was slightly acidic to neutral which is ideal for most plant to grow. The water retention capacity, moisture content and organic matter content increased from 11.47-27.90 ml/g, 5.03-21.07% and 2.35-3.68% respectively at two weeks interval but fluctuates at subsequent weeks. A total of eleven (11) fungi were isolated from the rhizosphere and were identified as, Aspergillus niger, Aspergillus fumigatus, Aspergillus flavus, Aspergillus bertholletius, Fusarium oxysporum, Galactomyces candidum, Helminthosporium solani, Rhizopus stolonifer, Mucor racemosus, Penicillium citrinum and Trichoderma viride. All fungi were present in the rhizoplane except Aspergillus bertholletius and Penicillium citrinum. Rhizosphere had a greater number of fungi than the rhizoplane. Aspergillus species were predominant in both the rhizosphere and rhizoplane. A. niger had the highest frequency of occurrence of 58.67% on the 6th week and 65.79% on the 4th week in rhizosphere and rhizoplane respectively. The colony forming unit (cfu/g) of Aspergillus niger was significantly different from all other isolates at P≤0.001 followed by Mucor racemosus and Fusarium oxysporum with significant differences at P≤0.05 and P≤0.01 respectively. Conclusion: The rhizosphere and rhizoplane of okra plants has been shown to be rich in fungal diversity and a greater number were obtained from the rhizosphere. The data obtained from this work could be exploited by microbial ecologist to ascertain ecological associations and biomass increase by the fungal communities which also forms part of ecosystem. The fungi had no pathological effect on the plant which suggest positive effect on the growth and development of okra plant as the plant aged.

scholarly journals Influence of organo-mineral fertilizers on the basis of the precipitation of sewage on micromycetes cenosis

2015 ◽  
Vol 16 (1-2) ◽  
pp. 75-81
Author(s):  
V. M. Gryshko ◽  
O. N. Korinovskaya
Keyword(s):  
Fusarium Oxysporum ◽  
Field Experiments ◽  
Trichoderma Viride ◽  
Steppe Zone ◽  
Control Site ◽  
Shannon Index ◽  
Mineral Fertilizers ◽  
Frequency Of Occurrence ◽  
Microscopic Fungi ◽  
A Site

One from actual problems of ecological safety of the modern industrial cities development is utilization of sewage. One of solutions of this problem is studying of possibility of use of ecologically safe organo-mineral fertilizers on the basis of a precipitation of city sewage. Therefore studying of influence of organo-mineral fertilizers on the basis of a precipitation of sewage (Dnipropetrovsk) in comparison with complex fertilizer ammophos on the number and specific structure of soil micromycetes was the purpose of researches. Field experiments were made on sites of 5 m2 in the following variants: control without fertilizers; introduction of ammophos and organo-mineral fertilizers on the basis of a precipitation of city sewage in number of 10 and 30 t/hectare. Experiments were made in triple frequency on fields of Erastovsky experimental station of Institute of agriculture of steppe zone NAAS of Ukraine (Pyatikhatsky area, Dnipropetrovsk region). The soil (chernozem usual) selected from depth of 0–10, 10–20 and 20–30 cm under crops of summer barley of a sort «Galaxies» in a phase of full maturing of seeds. Quantity of soil micromycetes considered on Capek agarized medium. Structure of soil microscopic fungi cenosis estimated using indicators of frequency of species occurrence, similarity of communities (Serensen coefficient), extents of species domination in cenosis (Berger-Parker index), specific wealth (Simson index) and a specific variety (Shannon index). In a layer of soil 0–10 cm of a site at introduction of 30 t/hectare of organo-mineral fertilizers on the basis of a precipitation of city sewage the quantity of microscopic fungi increased by 1.5 times in comparison with control. In the bottom layers (10–20 and 20-30 cm) – in 1.3 and 1.6 times –espectively. The increase in quantity of micromycetes is noted and in the soil of sites after introduction of 30 t/hectare of ammophos. In a layer of soil 0–10 cm their number increased by 2.3 times, and in the bottom layers – in 1.9 and 2.1 times respectively in comparison with control. From soils of a site of a field experiment are allocated and identified 13 species from 10 genuses of microscopic fungi. Soils of sites of various variants of experience differed on the frequency of occurrence of microscopic fungi. From the chernozem usual of control site are allocated 4 species of micromycetes. In micocenosis dominated Fusarium oxysporum with a frequency of occurrence 100 %, to subdominant species (frequency of occurrence 40 %) belonged F. solani. The least similar on the control was micocenosis of site at introduction of 30 t/hectare of ammophos. Micocenosis of soils in variants of experience at introduction of ammophos in number of 10 t/hectare and organo-mineral fertilizers from a precipitation of city sewage in number of 30 t/hectare were very close to control variant. In the soil of site at introduction of organo-mineral fertilizers from a precipitation of city sewage in number of 30 t/hectare 6 species of microscopic fungi are identified. In micocenosis dominated P. vinaceum (frequency of occurrence 80 %), Trichoderma viride (frequency of occurrence 40 %) belonged to subdominants. On the basis of determination of micromycetes frequency of occurrence, coefficient similarities of communities, indexes of domination, specific wealth and variety, it is proved that entering into the soil of organo-mineral fertilizers on the basis of a precipitation of sewage promotes to increase of specific variety of microscopic fungi. It is shown that use of organo-mineral fertilizers on the basis of a precipitation of sewage considerably reduces the frequency of occurrence of a phytopathogenic specie Fusarium oxysporum which is the activator of root decay at plants.

TEM studies of tweed microstructures in annealed amelia albite

1990 ◽  
Vol 48 (4) ◽  
pp. 1064-1065
Author(s):  
Y. J. Kim ◽  
D. M. Henderson
Keyword(s):  
Annealing Time ◽  
The Other ◽  
Frequency Of Occurrence ◽  
Systematic Trend ◽  
Tweed Structure

Natural Amelia albite (Ab99.3An0.1Or0.6) annealed at 1073° and 924°C for various periods up to 140 days has been studied by NMR. TEM studies of the same sample revealed a distinct tweed microstructure in some samples annealed at both 1073°C and 924°C. On the whole, the quasi-regular tweed has a periodicity of 100 - 200 Å in both directions, one nearly normal to b* and the other approximately parallel to b*, which gives rise to two-directional streaking in SADP’s (Fig. 1 and 2). However, there are some differences in the tweed structure developed on annealing at 1073°C and at 924°C in albite.Albite samples annealed at 1073° show a systematic trend in their development of tweed structures: the regularity, periodicity, and frequency of occurrence increase with annealing time during the first 3 days, and then decrease gradually until no tweed microstructures are seen in samples annealed for more than 15 days. The tweed structure proceeds locally to form one-directional twin-like microstructures.

An Investigation of the Assumptions Underlying the Scoring System of the Arizona Articulation Proficiency Scale: Revised

1979 ◽  
Vol 10 (4) ◽  
pp. 241-245
Author(s):  
Richard J. Schissel ◽  
Linda B. James
Keyword(s):  
Scoring System ◽  
Frequency Of Occurrence

This study examines the assumptions underlying the scoring system of the Arizona Articulation Proficiency Scale: Revised. Twenty-one children between the ages of four years two months and six years 11 months were administered the Arizona Articulation Proficiency Scale: Revised and the Screening Deep Test of Articulation. The subjects' performance on the two tests was compared for the phones: [s], [l], [r], [t∫], [θ], [∫], [k], [f], and [t]. Results suggested that 1) the production of most sounds in only two contexts does not necessarily reflect the accuracy of production of those sounds in other contexts, and 2) for the sounds tested, the weightings assigned on the basis of their frequency of occurrence rather than the frequency with which they were misarticulated overestimated the extent of many articulation errors.

Teachers' Stereotypes of Children Who Wear Hearing Aids

1981 ◽  
Vol 12 (3) ◽  
pp. 139-144 ◽  
Author(s):  
Cletus G. Fisher ◽  
Kenneth Brooks
Keyword(s):  
Elementary School ◽  
School Child ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Social Implications ◽  
Elementary School Child ◽  
Classroom Teachers ◽  
Frequency Of Occurrence ◽  
Service Training

Classroom teachers were asked to list the traits they felt were characteristic of the elementary school child who wears a hearing aid. These listings were evaluated according to the desirability of the traits and were studied regarding frequency of occurrence, desirability, and educational, emotional, and social implications. The results of the groupings are discussed in terms of pre-service and in-service training.

Direct coding for frequency of occurrence

1991 ◽  
Author(s):  
Iohn Jonides ◽  
Caren M. Jones
Keyword(s):  
Frequency Of Occurrence

Computerization of the Patient History -Patient Answers Compared with Medical Records

1986 ◽  
Vol 25 (04) ◽  
pp. 222-228 ◽  
Author(s):  
M. J. Quaak ◽  
R. F. Westerman ◽  
J. A. Schouten ◽  
A. Hasman ◽  
J. H. Bemmel
Keyword(s):  
Internal Medicine ◽  
Medical Records ◽  
Patient Record ◽  
Frequency Of Occurrence ◽  
History Taking ◽  
Patient History ◽  
Patient Complaints ◽  
Computerized Patient Record ◽  
Extensive Information ◽  
Experienced Physician

SummaryComputerized medical history taking, in which patients answer questions by using a terminal, is compared with the written medical record for a group of 99 patients in internal medicine. Patient complaints were analysed with respect to their frequency of occurrence for all important tracts, such as the respiratory, the gastro-intestinal and the uro-genital tracts. About 36% of over 3,200 patient answers were identical in the patient record and the written record, but a considerable percentage of complaints (56%), that were present in the patient record, were missing in the written record; the reverse was true for 4.5%. A computerized patient record appears to contain more extensive information about patient complaints, still to be interpreted by the experienced physician.

Utilizing next-generation sequencing to identify prey DNA in western North Atlantic grey seal Halichoerus grypus diet

2020 ◽  
Vol 655 ◽  
pp. 227-240
Author(s):  
KR Flanders ◽  
ZH Olson ◽  
KA Ono
Keyword(s):  
Next Generation Sequencing ◽  
Feeding Habits ◽  
Atlantic Menhaden ◽  
Halichoerus Grypus ◽  
Frequency Of Occurrence ◽  
Grey Seal ◽  
Next Generation ◽  
Significant Difference ◽  
Generation Sequencing ◽  
Seal Diet

Increasing grey seal Halichoerus grypus abundance in coastal New England is leading to social, political, economic, and ecological controversies. Central to these issues is the foraging ecology and diet composition of the seals. We studied grey seal feeding habits through next-generation sequencing of prey DNA using 16S amplicons from seal scat (n = 74) collected from a breeding colony on Monomoy Island in Massachusetts, USA, and report frequency of occurrence and relative read abundance. We also assigned seal sex to scat samples using a revised PCR assay. In contrast to current understanding of grey seal diet from hard parts and fatty acid analysis, we found no significant difference between male and female diet measured by alpha and beta diversity. Overall, we detected 24 prey groups, 18 of which resolved to species. Sand lance Ammodytes spp. were the most frequently consumed prey group, with a frequency of occurrence (FO) of 97.3%, consistent with previous studies, but Atlantic menhaden Brevoortia tyrannus, the second most frequently consumed species (FO = 60.8%), has not previously been documented in US grey seal diet. Our results suggest that a metabarcoding approach to seal food habits can yield important new ecological insights, but that traditional hard parts analysis does not underestimate consumption of Atlantic cod Gadus morhua (FO = 6.7%, Gadidae spp.) and salmon Salmo salar (FO = 0%), 2 particularly valuable species of concern.

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