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Wyszukujesz frazę "Wubneh, Wasihun Yaregal" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Parthenium hystrophorus in Ethiopia: Distribution, Impact and Management - A Review
Autorzy:
Wubneh, Wasihun Yaregal
Powiązania:
https://bibliotekanauki.pl/articles/1066272.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ethiopia
Parthenium hystrophorus
distribution
impact
management
Opis:
Parthenium, an aggressive invasive weed, is believed to be a native to North and South America. Due to its allelopathic effect and adaptability to different environmental conditions, it is now distributed throughout the world including Ethiopia, where it was reported first in 1988, in the eastern and later in the north-eastern parts of the country. Some scholars believe that Parthenium came to Ethiopia together with the donated grain when the country was hit by famine. Othersopine that entered into the country during the Ethio - Somalia war in 1976/77 through military vehicles from Somalia. Still others also presume it has slipped into Ethiopia from the neighboring countries like Kenya. The weed aggressively invaded several rangelands in the country due to its allelopathic effect, capacity to produce copious amount of seeds and its ability to compete for resources to survive. It can affect the biodiversity, agriculture, human and animal health and the economic activities of society. Although several mitigation methods, mechanical, cultural, chemical, biological and utilization methods are used to control it, there is no single effective method, as each method suffers from limitations. This noxious weed can be managed by public awareness and participatory integrated approaches. There is a need to encourage the research on utilization of this weed for insecticidal properties and try to evaluate the potential on pests of different crops. Therefore, managing this troublesome weed through integrated and eco-friendly approaches is suggested for an effective management.
Źródło:
World Scientific News; 2019, 130; 127-136
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological control of chickpea pod borer, Helicoverpa armigera Hubner (Lepidoptera: Noctuidae): A global concern
Autorzy:
Wubneh, Wasihun Yaregal
Powiązania:
https://bibliotekanauki.pl/articles/1192108.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
bioagents
Cicer arietinum
Helicoverpa armigera
integrated pest management
Opis:
Chickpea (Cicer arietinum L.) is grown widely in the world because the seeds are rich source of protein for the rapidly increasing population. However, the production and productivity of chickpea have been experienced drastically because of biotic and abiotic stresses. It is vulnerable to a broad range of pathogens and the mainly severe pest being gram pod borer, Helicoverpa armigera. For the management of this serious pest, application of insecticides has several adverse effects on living organisms and the environment as a whole, the use of biological agents for chickpea improvement appears to be appropriate approach. Various studies by different scholars on the effect of different bio-agents against H. armigera have been carried out and found to confer resistance to pod borer. The use of Bacillus thuringiensis (Bt) based microbial insecticides have become an integral part of IPM approaches, particularly because these preparations provide an environmentally suitable alternative to the generally hazardeous broad-spectrum chemical insecticides. These bacterial insecticides like Nuclear Polyhedrosis Virus (NPV), which is target specific and exert no effect on beneficial organisms (e.g. parasitoids and predators). Most natural populations of H. armigera have at least some degree of infection by species-specific NPVs. When the degree of NPV infection can be enhanced, H. armigera larval population can be decimated, without deleterious effects on any other organisms. Various potentially effective parasitoids, like ichneumonid, Campoletis chloridae and Trichogramma spp., are found parasitizing eggs and larvae of H. armigera infesting chickpea. Various insectivorous birds and use of bird perches have long been observed to be effective predators of H. armigera larvae. Similarly various plant extracts have shown insecticidal properties and can be used effectively on field crops. Use of different bio-agents and botanicals having easy ways of formulation, cost effective, environmentally suitable and no or
Źródło:
World Scientific News; 2016, 45, 2; 92-110
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of diseases on rice (Oriza sativa L.) in major growing fields of Pawe district, Northwestern Ethiopia
Autorzy:
Wubneh, Wasihun Yaregal
Bayu, Flagote Alemu
Powiązania:
https://bibliotekanauki.pl/articles/1190131.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
disease
distribution
incidence
Oriza sativa
prevalence
severity
Opis:
Disease survey was carried out on 37 rice fields in Pawe woreda of Metekel zone to evaluate the prevalence and distribution of different diseases on rice. 0.5m by 0.5m (0.25m2) quadrates was used to assess the type of diseases prevailed in the field. Disease prevalence was calculated as the proportion or percentage of fields showing the disease, out of the total number of fields assessed. Disease incidences were determined as the proportion of plants showing symptoms, expressed as a percentage of the total number of plants assessed. The diseases prevalence, incidence and severity were leaf blast showed the highest prevalence, incidence as well as severity rate 80.08, 75 and 5.2%, respectively at vegetative growth stage as compared to other diseases. From vegetative to heading growth stage leaf blast, panicle blast and bacterial panicle blight were radically increased in prevalence, incidence and severity percentage; leaf blast recorded 80.08, 75, 5.2% at vegetative while 100, 96 and 7.21%, respectively at heading, panicle blast recorded 13.51, 11.15, 1.15 at vegetative while 100, 100 and 10.3% at heading stage and bacterial panicle blight was recorded 9.67, 13.46, 0.9% at vegetative while 21.2, 32.3 and 4.2%, respectively at heading growth stage. In general, the future rice diseases management research direction should be on the diseases with high incidence and severity such as leaf blast, panicle blast and bacterial panicle blight.
Źródło:
World Scientific News; 2016, 42; 13-23
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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