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Search Results: 1 - 10 of 62 matches for " Dona Dakouo "
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Inventory, Geographical Distribution of Caryedon Species in Burkina Faso, and Evaluation of Their Impact on Stored Groundnut  [PDF]
Issoufou Ouedraogo, Mbacke Sembene, Dona Dakouo
Advances in Entomology (AE) , 2017, DOI: 10.4236/ae.2017.52005
Abstract: To understand the mechanism of infestation of stored groundnut in farming areas, studies on the inventory and geographical distribution of Caryedon species were carried out in the tree savannah and in producers’ storage structures. The incidence of C. serratus in stored groundnut was evaluated. Inventory and geographical distribution of insects belonging to Caryedon genus was achieved through a sampling in the savannah and producers’ granaries. The inventory and geographical distribution of insects was made throughout Burkina Faso whereas the evaluation of the perforations of groundnut pods was made in the western zone of the country. The results of the inventory showed the presence of two species belonging to Caryedon genus which are C. serratus and C. crampelii. These species are found on the agro-ecological zones of the country. The survival and maintenance of Caryedon species genus are ensured by the presence of plants belonging to various families such as Caesalpiniceae and Mimosaceae. The evaluation of the losses caused by C. serratus in producer’s stored groundnut revealed that the pods perforation rate varied according to the locality. In?Toussiana, the rate of perforated pods ranged from 53.72% to 100% in five months while in?Karangasso Sembla, for the same conservation time, the rate was in the range from 2.8% to 35%. However it is C. serratus which is responsible for the losses observed in the stored groundnut. Indeed, in the western area of Burkina Faso where more than 25% of the production is realized, 70% of
Incidence of the African Rice Gall Midge (AfRGM), Orseolia oryzivora H. & G. in Relation with Period of Rice Transplanting in the Kou Valley, Burkina Faso  [PDF]
Karim Sama, Souleymane Nacro, Cheikh Thiaw, Dona Dakouo
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.42011
Abstract: The African Rice Gall Midge, Orseolia oryzivora H. & G., is an important insect pest recorded in 20 countries in Sub-Sahara Africa. In Burkina Faso, the insect pest particularly prevails in Western and South-Western of the country where both biotic and abiotic conditions favor its development. The insect pest can damage up to 60% of rice tillers in Western Burkina Faso. A study was conducted during the 2011 wet season in the Kou Valley, located 25 km North-West of Bobo-Dioulas- so, Western Burkina Faso. Its objective was to evaluate the damage of this insect pest in farmers’ fields in relation with rice transplanting periods. The Kou Valley rice scheme, 1200 ha, was divided into two zones within which 48 farmers’ fields were randomly selected in relation with rice transplanting periods: P1: 1st period; P2: 2nd period and P3: 3rd period; that is 16 fields per period. Both agronomic and entomological evaluations were performed each week starting from the 21th day after transplanting (DAT) up to 84 DAT. Results showed that the highest average damage level (16% of galls) was recorded in the 3rd transplanting period. The highest larval and pupal parasitism was recorded in P3 at 84 DAT. Pupal parasitism due to Aprostocetus procerae Risbec was higher than larval parasitism due to Platygaster diplosisae Risbec. Lastly, the lowest yield (4.78 t/ha) was recorded in P3. These results can be used in the implementation of an integrated pest management strategy for this insect pest in the Kou Valley.
Influence of Host Plants on the Development of Caryedon serratus Olivier (Coleoptera: Chrysomelidae, Bruchinae), Insect Pest of Groundnut Stocks in Burkina Faso  [PDF]
Issoufou Ouedraogo, Sacamba Aimé Omer Hema, Wendgoundi Guenda, Dona Dakouo
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.45029
Abstract:
The beetle Caryedon serratusOlivier is a major insect pest responsible for the infesta-tion and damage on groundnut during storage. To understand the infestation mecha-nism of groundnut stocks, studies have been carried out on this insect biology under laboratory conditions in relation with its host plants. The results have demonstrated that the pre-oviposition on groundnut lasts on average 1.28 days. The oviposition pe-riod is 12.04 days, during which 80.42 eggs on average are laid. From hatching to adult stage, C. serratus larvae development goes through four stages with variable durations according to the stage. Three families of host plants (Papilionaceae; Caesalpiniaceae and Mimosaceae) were selected for females C. serratusto lay on their seeds. The re-sults showed that more eggs were laid on the seeds of Papilionaceae (98.75% of in-fested seeds) followed by Caesalpiniaceae (28.59% of infested seeds). Studies were carried out on the laying behavior of C. serratus under laboratory conditions and have revealed that whatever the conditions, C. serratus?females lay on all the plant species seeds exposed. Insects’ development duration has varied according to the plant species seeds used.
Inventory and Distribution of Mango Mealybugs Species in Western Burkina Faso: Relative Abundance and Population Fluctuation  [PDF]
Karim Nébié, Souleymane Nacro, Issoufou Ouédraogo, Dona Dakouo, Lenli Claude Otoidobiga
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.43020
Abstract: Rastrococus invadens was the only reported mealybug species on the mango tree in Western Burkina Faso. This study aimed at carrying out the inventory and showing the importance and distribution of other mealybug species associated with the mango tree. It was also important to determine the periods of abundance of these species vis-a-vis R. invadens. For this purpose, the density of mealybugs was assessed in three study sites (Toussiana, Bérégadougou and Orodara) in Western Burkina Faso. The observations were made from June 2014 to June 2015 at a frequency of 15 ± 1 days. They focused on 20 leaves (5 leaves/cardinal point) levied on each mango tree. The species identified as Ferrisia virgata Cockerell and Icerya aegyptiaca Douglas were collected from mangos infested by R. invadens representing 98% - 99% of the density of the observed mealybug species. The periods of abundance of F. virgata and I. aegyptiaca were respectively the dry season and the rainy season. The effect of temperature, relative humidity and rainfall on the populations of F. virgata and I. aegyptiaca was also discussed. These results highlight the distribution range of F. virgata and I. aegyptiaca worldwide including Burkina Faso. R. invadens was the main mealybug species on mango in Burkina Faso in general and in the Western region of the country in particular.
Influence de la succession des générations de cicadulina mbila naudé dans les conditions artificielles d\'élevage sur l\'efficacité de transmission du virus de la striure du ma s au Burkina Faso
Traoré Nafoni Seydou, Dabiré Anogmain Rémy, Dakouo Dona, Zida Kaditiatou, Ouedraogo Issoufou
African Crop Science Journal , 2004,
Abstract: L\'étude de l\'influence de la succession de quatre générations d\'une population de Cicadulina mbila Naude (Homoptera: Cicadellidae) sur la transmission du Maize Streak Virus (MSV) réalise au Burkina Faso a montre qu\'au cours des générations successives, l\'insecte vecteur voit son efficacité de transmission du virus diminuée de + 26% tandis que la période d\'incubation de la maladie augmente de 3,11 jours. Les femelles de la quatrième génération sont plus aptes a transmettre efficacement le virus (73,33%) que les males (57,21%). La période d\'incubation de la maladie est de 5,83 jours pour les femelles contre 6,16 jours pour les males. Cette étude a montre que le taux de transmission du virus obtenu avec les quatre générations de C. mbila, issues de l\'élevage artificiel, et est toujours supérieur au taux de 35% recommandé par l\'IITA et peut donc être accepté par les tests de sélection du ma s pour la résistance au virus du MSV. Mots clés: Cicadelles, élevage artificiel, ma s, générations, virus ABSTRACT The study of the influence of the succession of four generations of Cicadulina mbila Naude (Homoptera: Cicadellidae) on Maize Streak Virus (MSV) transmission in Burkina Faso showed that over successive generations, the insect vector loses its virus transmission efficiency by ± 26%, and the disease incubation period increases by 3.11 days. Females are more efficient in transmissing the virus (73.33%), than the males (57.21%). The disease transmission period is 5.83 days for the females compared to 6.16 days for the males. Finally, this study showed that the transmission rate obtained over four generations of mass reared C. mbila is always higher than the recommended rate of 35% for maize breeding and therefore, can be used in breeding for MSV virus resistance. Key Words: Cicadella, mass rearing, maize, generations, virus African Crop Science Journal Vol.12(4) 2004: 343-349
Listeria monocytogenes
Dona Benadof
Revista chilena de infectología , 2008,
Abstract:
A solution to Ahmed's Integral(II)
Dona Ghosh
Mathematics , 2014,
Abstract: In the year 2000, Ahmed proposed a family of integrals in the American Mathematical Monthly which invoked a considerable response then. Here I would like to present another solution to this family of integrals. I propose to call this as Ahmed's Integral (II) in the light of the well known Ahmed's Integral.
Fusarium especie
Dona Benadof F
Revista chilena de infectología , 2010,
Abstract:
Neisseria sicca
Dona Benadof F
Revista chilena de infectología , 2009,
Abstract:
BIOANALYTICAL METHOD DEVELOPMENT AND VALIDATION OF PIRFENIDONE BY RPHPLC METHOD AND ITS APPLICATION TO THE DETERMINATION OF DRUG FOOD INTERACTION STUDY IN WISTER RATS
N. Tamilselvi,Dona Sara Kurian
International Journal of Pharmaceutical and Biological Research , 2012,
Abstract: A simple precise, accurate RP-HPLC method has been developed and validated for bioavailability study of pirfenidone in wister rat plasma. The separation and quantization of pirfenidone was achieved on a C18 reversed phase column using the mobile phase in gradient mode constituting of eluant A HPLC grade water (adjusted to pH 3.5) and eluant B 20% acetonitrile and 15% of methanol in the ratio of 60: 40 at a flow rate 1 mlmin-1. Eluted components were detected at 324 nm. The method showed good linearity for Pirfenidone in the range of 50–250ng mL-1, Y=54.97x - 349.5and correlation coefficient R2 is 0.998 respectively. The limit of quantitation (LOQ) and limit of detection (LOD) were found to be 12 and 20 ng mL-1respectively.Thedeveloped method shows good accuracy and precision. . Accuracy ranges from 98.49% to 99.37% with the precision 6.43% to 7.67% in inter-day method. Intra-day method the accuracy ranges from 98.64% to 99.33%with the precision 5.64% to 6.93 %. For bioanalytical study, parameters like Cmax, Tmax, AUC0-t,AUC 0-∞,Keli and T1/2 are compared by statistical analysis. The maximum concentration (Cmax) obtained for pirfenidone before and after food was found to be 1020.76 ng mL-1 and 836.5ng mL-1 respectively. The half life (T1/2) of pirfenidonebefore and after food were calculated and found to be 2.732158 h and 4.009485 h respectively. Area under the curve t AUC.0 of pirfenidone before food was calculated as 3060.95nghr mL-1 and 0 AUC was found to be 3053.07ng mL-1. Area under the curve t AUC.0 of pirfenidone after food was calculated as 2534.16nghr mL-1 and 0 AUC was found to be 2510.64ng mL-1. Elimination rate constant for Pirfenidone was found to be 0.004228 h-1and 0.002881 h-1 respectively. This method was successfully applied to the bioavailability study of pirfenidone.
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