النشر العلمي

  • Efficacy of a Sudanese Strain of Entomopathogenic Fungus, Metarhizium anisopliae Met. Sorokin on Puparia of Bactrocera dorsalis Hendel, Under Laboratory Conditions. In: Niassy S., Ekesi S., Migiro L., Otieno W. (eds) Sustainable Management of Invasive Pests in Africa

   Fruit flies (Diptera: Tephritidae) are among the main constraints that limit horticultural production in Sudan. The country has an enormous potential for horticultural production, over its wide range of climatic conditions and diverse ecosystems. However, it is threatened by an invasion of exotic fruit flies over its long borders with neighbouring countries, and by its weak interception and quarantine procedures. Although entomopathogenic fungi are known to attack fruit flies, very few efforts have been exerted to confirm their efficacy in integrated pest management (IPM) strategies against fruit flies. The fungus Metarhizium anisopliae Sorokin has been found on the dead body of a larva of white grub, Schizonycha sp. (Coleoptera: Melolonthidae), at Kenana Sugarcane Farm. A laboratory experiment was undertaken by applying four different concentrations (20 × 10⁶, 10 × 10⁶, 5 × 10⁶ and 2.5 × 10⁶) of the fungus on the pupae of Bactrocera dorsalis in order to inhibit adult emergence. The results showed that adult emergence from the pupae of B. dorsalis was inhibited by the tested concentrations of M. anisopliae. The inhibition increased with increasing concentrations. LC50 and LC90 values for the fungus were 10 × 10⁶ and 18 × 10⁶ conidia/ml, respectively. The mentioned fungus can be incorporated in fruit fly management strategy.

published in Sustainability in Plant and Crop Protection, vol 14. Springer, Cham. Pp 303.

  • Composition and Distribution of Aquatic Weeds in some Minor Canals, Gezira Scheme, Sudan (2018)

      Excessive growth of aquatic weeds in irrigation systems is a worldwide problem. In Sudan, many irrigation schemes have been greatly affected by aquatic weeds such as Gezira scheme. The objective of the study was to evaluate the community composition and distribution of aquatic weeds in some minor canals in the Gezira scheme in 2018. The study area covered six minor canals at Centre Group at Gezira Scheme. Each minor canal was divided into three sections; head, middle and tail (18 sampling sites). The sites were surveyed once in every month for a period of three months during summer and winter seasons. The community composition of aquatic weeds was detected by visual observation, whereas the distribution of aquatic weeds was determined by calculation of percentage of relative frequency. Data were subjected to descriptive analysis and to analysis of variance. The results indicated that the community composition in the six minor canals consists of four groups of aquatic weeds as follows; floating, emergent, submergent and bank aquatic weeds and consisted of 12 species belonging to nine families. Results showed considerable differences in distribution throughout the year. The most dominant species within the groups were; Vossia cuspidata (33% - 41%) within the group of floating weeds, Cyperus alopecuroides (87% - 55%) within the group of emergent weeds and Cynodon dactylon (75% - 83%) within the group of bank aquatic weeds during both summer and winter seasons. Submergent weeds present only in winter season in one species Najas pectinata. Also, results of relative frequency within all aquatic species showed that Vossia cuspidata and Cynodon dactylon were the most dominant species. These finding gives many insights about the problems of aquatic weeds in minor canals and would be useful in the management and control of aquatic weeds.

published in International Journal of Innovative Approaches in Agricultural Research, 4(3): 283-293

  • Jackal Food (Hydnora spp.): A Review of some Botanical Aspects

Hydnora species (Hydnora spp.), holoparasitic flowering plants belong to the family Aristolochiaceae, growing on the roots of some species of the families Euphorbiaceae, Fabaceae and Burseraceae in arid and semiarid regions of Africa, Madagascar and Arabian Peninsula. The objective of this article was to review and evaluate the past and current status of knowledge of some botanical aspects regarding Hydnora spp. and to identifying gaps in this knowledge. Available literature on this plant was carefully reviewed in details. The results of this reviewing showed that several studies have been carried and out and made some significant advances in the understanding of the taxonomy, identification, description, distribution and host range of the Hydnora species as well as biology, physiology, anatomy and ecology in addition to the management. Moreover, Hydnora plants have an economic importance, as it can be used as human food and animal feed, as well as medical, health and pharmaceutical uses in addition to energy production and the preservation of biological diversity. On the other hand, the plants are parasitic on the trees of Acacia and Euphorbia, which are known for their economic importance. In conclusion, much remains to be learned about the botany of this strangest plant. More studies are also necessary to evaluate the economic importance of Hydnora plants.

published in International Journal of Academic Multidisciplinary Research, 4 (9): 55-63.

  • Distribution and Mapping of Aquatic Weeds in some Minor Canals, Gezira Scheme, Sudan

Aquatic weeds have various problems in water bodies, irrigation and drainage systems around the world. Sudan have been greatly affected by aquatic weeds in many irrigated schemes such as Gezira scheme. The objective of this study was to evaluate the distribution and mapping of aquatic weeds in some minor canals in the Gezira Scheme in 2018. The study area covered six minor canals at Centre Group at Gezira Scheme; namely: Barakat I, Barakat II, Barakat III, El sonni, El ibrahim and Haj elnour which were divided into 18 sampling sites (3 sections for every canal). The distribution (percentage of frequency) of aquatic weeds of each site was determined. Geographical distribution of aquatic species was determined using the geographical positioning system (GPS). Data were subjected to descriptive analysis and to analysis of variance (ANOVA). The results showed that considerable differences in distribution of aquatic weeds throughout the year with different frequency as follows; floating weeds (50% - 61%), emergent weeds (18% - 24%), submergent weeds (0% - 13%) and bank aquatic weeds (61% - 67%).The most dominant species were Vossia cuspidata and Cynodon dactylon (100%) in both summer and winter seasons. Also, the results showed that the percentages of frequency of most aquatic weed species in the six minor canals were higher in the winter season than summer season, in addition to differences in the geographical distribution of aquatic species throughout the year. All these findings give many insights about the problems of aquatic weeds in minor canals and would be useful in the management of aquatic weed species.

published in International Journal of Academic Multidisciplinary Research, 4 (9): 9-17

  • Efficacy and Selectivity of Oxyfluorfen 240 Ec for Weed Control in Soybean (Glycine max (L.) Merr.), Gezira State, Sudan.

   Soybean, Glycine max (L.) Merr., is one of the most important oil crops of the world which also has tremendous importance as a food legume. In the past decade, interest in the soybean crop in Sudan has increased due to increased demand for the crop as an important crop in the food industry. Weeds are considered one of the major limiting factors in soybean production. The aim of the present study was to evaluate the efficacy and selectivity of the herbicide oxyfluorfen on weed control in soybean at Gezira State, Sudan. A field experiment was carried out at Gezira Research Station Farm, Wad Medani, Sudan during summer season 2018/19. The oxyfluorfen (Harris 240 EC®) was applied at three doses as pre-emergence treatment. The rates were 0.2678, 0.3371 and 0.446 Kg a.i./ha. Weeded and un-wedded treatments were included for comparison. The treatments were arranged in a randomized complete block designed with four replicates. Data were subjected to descriptive analysis and analysis of variance procedure (P ≤ 0.05). Significant means were separated using Duncan’s Multiple Range test. The results showed that all herbicide treatments were effective in weed control. They significantly reduced weed infestation compared to un-weeded control and significantly promoted the yield and various growth characters of soybean over un-weeded control treatment.  Application of oxyfluorfen at the rate 0.3371 and 0.446 Kg a.i./ha significantly controlled grasses and broad leaf weeds in soybean. It also found superior in respect of various growth and yield attributes. Oxyfluorfen at the rates 0.3371 and 0.446 Kg a.i./ha gave comparable seed yield (979.1 and 1079.2 kg /ha, respectively). Chemical analysis of soybean seeds showed that no residues of the tested herbicide are detected. It concluded that the tested pre-emergence herbicide at the rate 0.3371 kg a.i./ha could be used effectively and safely in controlling weeds in soybean crop.

published in University of Bakht Alruda Scientific Journal, 30: 97-109.

© 2016 University Of Gezira. All rights reserved | Design by Informatics Administration