An experiment was conducted for two summer seasons (2000 and 2001) to study the effect of nitrogenous and phosphatic fertilizers on performance of rainfed pearl millet (Pennisetum glaucum L.) grown on clay loam soil at University of Zalingei site, Western Darfour states, Sudan. The experimental design used was spilt-plot design with five replications. Four nitrogen treatments (0, 30, 60 and 80 kg N/ha) and four phosphorus treatments (0, 15, 30 and 60 kg P/ha) were used. Nitrogen treatments were assigned to the main plots and phosphorus levels were allotted to the sub-plots. Urea (46% N) and triple superphosphate (48% P2O5) were used as sources of nitrogen and phosphorus, respectively. Phosphorus treatments were applied at sowing, whereas nitrogen fertilizer was split into two equal doses, one was added four days after emergence and the second was three weeks after sowing.  Results of the experiments showed that application of nitrogen increased the plant height over the control. The increments were in range of 5.7% - 16.1%. Leaf area index (LAI), grain and stover yields were significantly affected by nitrogen application. The increments over control were in the range of 39% - 92.3%, 10.1% - 112.7% and 34.1% - 126.9% for LAI, grain yield and stover yield, respectively. Regarding phosphorus, the results revealed that phosphorus addition had a significant effect on plant height, LAI, grain and stover yields. The increments over control ranged from 2.4% - 11.3%, 6.3% - 17.9%, 6.7% - 24.6% and 6.8% - 35.4% for plant height, LAI, grain and stover yields, respectively. The interaction between nitrogen and phosphorus had a significant effect only on LAI and plant height at the sixth week measurement in the first and second seasons, respectively. The tallest plants were obtained from 3N × 3P treatment whereas the greatest LAI was obtained by 3N × 2P treatment

The present study was carried out to maintain aromatic extracts of Melissa using different techniques (water distillation, steam distillation and extraction with acetone). The volatile components of these extracts were identified. Likewise, the antioxidative properties and antimicrobial activity of these extracts were determined.  Data confirmed that the yield percent of acetone oleoresin extract was higher than both of water distillation and steam distillation extracts. Moreover, fractionation of volatile components using GC/MS technique showed the ability of acetone to extract more components than that of other techniques. In addition to being more effective in extracting higher amounts of sesquiterpene and phenols fractions.  Odor threshold level confirmed that the concentration up to 1000 ppm from either water distillation or steam distillation extracts could be mixed with sunflower oil without affecting its odor, while acetone oleoresin extract could be used at concentration up to 800 ppm. Likewise, the different aromatic extracts of melissa exhibited antioxidative properties on sunflower oil. However, acetone oleoresin was markedly superior to that of water distillation as well as steam distillation extracts as antioxidant agents. This could probably attributable to the high content of some active components such as phenolic compounds in the acetone oleoresin extract. Also, antioxidant synergistic effect was observed for a mixture of 200 ppm tested extracts and BHT at 100 ppm. However, a mixture includes acetone oleoresin extract was the most effective as an antioxidant on sunflower oil. In conformity with antimicrobial activity, all tested extracts exhibited antimicrobial activities, however acetone oleoresin extract appeared the most potential antimicrobial spectra.

Black cumin is one of the important medicinal plant and well known to flok remedy. Balady, Sori and Turki cultivars belong to black cumin are variated in chemical composition and antiviral activity. The results reflected significant heritability between the three cultivars in length and number of capsule per plant and number of branches per plant, while non-significant values of plant height, number of locules capsule, and seed yield per plant. Eight fatty acids methyl esters were detected in seeds of three cultivars by GLC. It was found change quantitatively of fatty acid between three cultivars. SDS-PAGA showed change qualitatively of poly peptides content accompanying three cultivars. A similarity of about 90% was found between Balady and Sori cultivars in relation to heritability. Water seed extracts, in vitro reduced ToMV infectivity to 6.73; 6.78 and 5.08% of Balady, Sori and Turki respectively. Four hours post and pre ToMV inoculation were most sensitive period to ToMV replication for three cultivars. On the other hand, the antiviral event changed in conformation and chemical structure of virion, coat protein and nucleic acid of ToMV with black cumin seed extract by spectroscopy. Balady, Sori and Turki; black cumin  cultivars were varieted based on heritiability, chemical composition according to fatty acid GLC and polypeptide fraction SDS-PAGE analysis as well as antiviral activities against tomato mosaic tobamovirus.

Twenty nine actinomycetes isolates were isolated from Burullos Lake and characterized taxonomically for 62 phenotypic traits including morphological; biochemical, nutritional, substrate utilization and anti-microbial activities.  The results were analyzed by numerical techniques using the simple matching coefficient (SSM) and UPGMA clustering. At 54% similarity level, the majority of the isolates were grouped into six phena (A, B, C, D, E and F). Only two isolates were grouped separately and formed two single clusters at the same level of similarity. A representative isolate from each phenon was identified. The isolates were found to be Streptoverticillum morookaense, Nocardia brasiliensis, Streptomyces alanosinicus, Streptomyces globosus and Streptomyces gancidicus

New fruit juice blends which contain several potent antioxidants (carotenoides, ascorbic acid and selenium) in combination with other favorable aspects of flavor and color were tried. The trial included locally produced fruits such as Kaki, Papaya, Guava and Pomegranate. Five blends were prepared with different percentages of the prepared juices in trying to maximize the required nutrients such as carotenoides, ascorbic acid and other micro-nutrients. The best blend which had the highest content of ascorbic acid 45.73mg/100gm was blend No.(2) which contained 30% kaki, 30% papaya, 30% guava and 10% pomegranate  whereas blend No.(4) (50% kaki, 30% papaya, 10% guava, and 10% pomegranate had the highest content of carotenoids (33.58 mg/100gm). Selenium content of different blends were almost always the same. Organoleptic scores revealed that the best consumer preference was for blends No. (2 and 4). As for main components of different blends a slight difference could be observed between percentages of sugars and titratable acidity.

The study aimed at identifying both knowledge and skill levels of farmers in regard of technical recommendations of rationalizing irrigation water use and its various management systems, determine the deficit in their knowledge and skills degree in that regard as a step to propose an extension program that hope to remedy this gap. The study was conducted in Al-Wady Al-Gadid governorate on beneficiaries of “Darb Al-Arbe’en” project, with a random sample of 160 represent about 25% of total beneficiaries (640). Data were collected through a personal interview questionnaire during (August-September) 2005, and the following statistics were used: frequencies, percentages, arithmetic mean, standard deviation, simple correlation coefficients, F test and multiple regression analysis (Stepwise).

This investigation was carried out in the plastic house of Horticulture Research Institute, Agriculture Research Center, Giza during two consequent seasons (2002 – 2003) and (2003 – 2004). The study was aimed to enhance growth of Casimiroa rootstock seedlings to reach grafting size in a short time, beside defineding the suitable method of grafting. In this concern, results revealed that seed soaked in MgSO4 at 5 % for 15 min. and planted in media consists of peat and sand at 1 : 1, was increased seed germination percentage (92.1 and 94.8 %) and minimized the germination period (19.1 and 19.3 days), as compared with the other treatments. Thus it reached to the grafting size at a period of (179 and 180 days) in both seasons, respectively. However, Dormex (hydrogen cyanamide) treatment at 2% gave the highest root length (24.6 and 24.8 cm), and number of roots per plant (19.4 and 19.0). Results also showed that shield budding by using soft wood grafts, gave the highest percentage of success (69.2 and 72.4%), shortest  period of bud / scion (23.0 and 24.0 days), highest values of scion length (26.5 and 25.7 cm) and highest leaf area (38.28 and 40.67 cm2). However, cleft grafting with softwood grafts increased average number of leaves per sprouted graft (6.0 and 6.6) and shoot scion diameter (0.6 and 0.5 cm). Generally, seeds treated with MgSO4 at 5% berfore sowing in media consists of peat and sand at 1 : 1 in volume, induced healthy and sizeable rootstocks in a short time. Moreover, grafting rootstocks by soft wood grafts was the best method.

This investigation has been performed in Mariout Research Station, Desert Research Center (D.R.C.) throughout two successive growing seasons of 2002 / 2003 and 2003 / 2004. Canary grass plants were raised under 9 treatments which were the combinations of 3 biofertilizer sources i.e. Azotobacter, Azospirillum and uninoculated control and 3 micronutrients i.e. 2% FeSo4, 1% MnSO4 and control. The treatments were arranged in split-plot design with three replications.           The important results obtained can be summarized as follows: 1-    Maximum values of all growth parameters tested of canary grass plants were obtained when seeds were inoculated with Azotobacter compared to inoculation with Azospirillum or uninoculated control. Fresh and dry forage yields followed the same trend of growth parameters in their response to the different biofertilizer resources. 2-     All growth and forage yield traits of canary grass plants were increased when the plants were sprayed with 2% FeSo4 compared to spraying with 1% MnSo4 or control treatment.

In field study, Eleven mango varieties, (Mangiferae indica L.) at Sharkia, Ismailia, and Fayoum Governorates, were examined to estimate the population fluctuation of the bud mite Eriophyes mangiferae Sayed, their susceptibility to mite infestation, the relation between the mite infestation and chemical contents of mango buds and the correlation between the bud mite and malformation disease. The highest population occurred during Sept. to Jan. or Feb. and the lowest population was existed during Mar. to Jun. Temperature and relative humidity had no significant effect on the mite population. The highest level of mite infestation was recorded at Sharkia followed by Fayoum and Ismailia Governorates. Mango varieties were differed in their susceptibility to E. mangiferae infestation. Zebda, Taimour, Ewais and Arnaba were the most susceptible varieties, while Mabrouka, Company, Excellent Succari and White Succari were the least susceptible ones. On the other hand Mesk, Geolck and Alphonse varieties showed moderate susceptibility to mite infestation. Buds of some high susceptible varieties possessed a lower values of total carbohydrates and total soluble sugars than some moderate or susceptible varieties to mite infestation. Phenol contents recorded a higher levels in the most of susceptible varieties while a lower levels were found in the most of moderate and low susceptible varieties. The total soluble proteins and amino acids recorded a higher values in some susceptible varieties. The susceptible characteristic was positively correlated with total soluble proteins and amino acids while negatively correlated with the total carbohydrates and total soluble sugars. However the phenol content showed no clear trend. Obtained results also revealed that mango varieties had varying degrees of floral malformation, Company, Alphonse and Geolck were the most susceptible varieties, while Zebda var. was the most resistant one. Statistical analysis showed a negative correlation between the eriophid bud mite and the incidence of malformation disease. Zebda var. harboured the highest number of mites but exhibited the lowest percentages of malformation, whereas the opposite trend was observed with company var

Laboratory and field trials were carried out at Koom Hamada district and Etay El-baroud research station during 2004/ 2005 season to clarify the molluscicidal ac-tivities of the following: indoxacarb, lufenuron, Bacillus thurringiensis, kurestaci (Bt.) and methomyl against glassy clover snails Monacha cartusiana (Müler). Re-sults indicated that all tested pesticides decreased snails population compared with control. Under the field conditions, the efficiency of the tested compounds were 98.0, 93.4, 93 and 71.58% for methomyl, lufenuron, indoxacarb and Bt. after 5, 6, 13, and 28 days of treatment, respectively. Moreover the effect of LC50 and 0.5 LC50 of these compounds were investigated on some biochemical parameters in vivo. The activities of acetylcholinestrase (AChE), alanine aminotransferases (ALT) , as-partate aminotransferases (AST) and protein contents at different time intervals were evaluated. The specific activity of AChE reached 0.009, 0.002, 0.006 and 0.001 mole/ mg protein/ min for indoxacarb, lufenuron, Bt. and methomyl, respectively, after one day of treatment with (LC50 for each compound). In general, Bt. and in-doxacarb caused slight inhibition on AChE enzyme. All treatments decreased ALT and AST enzyme activity in the tested animals. However, Bt. Showed slight effect on the activity of aminotransferases enzymes.