Alternate host plants, hibernation sites and survival strategy of Cylas puncticollis Boh.: A new pest of cotton

Survey and field experiments from 2001 – 2005 were carried out on cotton farms and surroundings to determine the alternate host plants, hibernation and survival strategy of Cylas puncticollis Boh. (Coleoptera: Brentidae) in the Northern Guinea Savannah zone of Nigeria. Trials were also conducted on five malvaceous crops (cotton, kenaf, okra, red and white calyx roselle) in a completely randomised block design in three replications at Ngurore the ‘hot spot’ zone for the weevils. C.puncticollis was found on the following plants Astripomeoa lachnosperma,  Ipomoea eriocarpa, Corchorus spp., Celeosia spp., Commelina spp., Boerhavia spp., Hibiscus spp. and Abelmoschus spp. Peak period C. puncticollis was Nov. 1st with about 12 weevils/5plants. Hibernation for the adult weevils were cotton bracts, exposed roots of cotton, thrash debris and cracked soils. Pupae and adults of C. puncticollis were found within 1 – 15cm cracked soil depths around cotton and Ipomoea weeds. Adult weevils prefers dark corners and when disturbed moves at a faster speed or fain/fake death to escape enemies. Keywords: Alternate hosts, survival, hibernation, Cylas, Ipomoea, pest

Comunicación corta. Cultivares de algodón con resistencia moderada a African cotton mosaic virus

A 3 year screening of 25 long staple cotton cultivars for resistance to African cotton mosaic virus (ACMoV) conducted in northern Nigeria during the 1999-2001 wet seasons indicated that no cultivar was immune or resistant. Two cultivars, Pima S1 and Pima S4 were moderately resistant (16% infection), four cultivars Pima S2, Pima S3, Giza 45 and Giza 69 were moderately susceptible (31% infection), while the remaining 19 cultivars were highly susceptible. The moderately resistant cultivars are high yielding, have high quality lint characteristics such as crin percentage, bundle strength, and micronaire fineness. They can be used to reduce the menace caused by ACMoV on cotton in Nigeria.Se llevó a cabo durante tres años, durante las estaciones húmedas de los años 1999-2001, en el norte de Nigeria, una búsqueda de resistencia al African cotton mosaic virus (ACMoV) entre 25 cultivares de algodón de fibra larga. Ningún cultivar fue inmune o resistente. Dos cultivares (Pima S1 y Pima S4) fueron moderadamente resistentes (16% de infección), cuatro cultivares (Pima S2, Pima S3, Giza 45 y Giza 69) fueron moderadamente susceptibles (31% de infección) y los 19 cultivares restantes fueron altamente susceptibles. Los cultivares moderadamente resistentes dieron una producción alta y tienen una hiladura de alta calidad. Estos cultivares pueden ser utilizados para reducir la amenaza producida por ACMoV en algodón en Nigeria

Insights from Global Project Managers: Career Advice for Successful International Assignments

Qualitative analysis techniques were used to identify recurring themes from project manager interview summaries undertaken by 120 project management students. The themes and the resulting conceptual framework provide evidence for the factors that support the development of successful global project managers. Such factors were found to include taking the initiative to acquire an in-depth understand the local environment and to develop culture and language competence

Ethnomedicinal Survey and Phytochemical Screening of Plants Used To Treat Epilepsy by Traditional Healers in Etche, Rivers State, Nigeria

Epilepsy is one of the oldest recorded medical ailments. Ethnomedicinal survey was carried out to identify and take a detailed list of the medicinal plant species used to treat epilepsy and assess how they are used in Etche Local Government Area (LGA) of Rivers State, Nigeria. Semi-structured questionnaires were used during the survey to conduct interviews with traditional healers and other knowledgeable individuals on the use of medicinal plants in the treatment of epilepsy. Twelve communities were randomly selected while a total of 54 respondents were purposively selected. The respondents consist of 82.5% males and 12.3% females, 43.9% were above 60 years while 28.1% were between 51-60 years. Traditional medicine practitioners (TMP) formed 75.4% of the respondents, primary occupation of other knowledgeable respondents on plants used for epilepsy were civil servants (8.8%), farming and trading (3.5%). A total of 25 medicinal plant species were recorded during the survey. Phytochemical screening was carried out on five medicinal plants based on frequency of mention, the screening showed presence of alkaloids, triterpenoids, steroids, saponins, tannins, flavonoids, anthraquinones, cardenolides and carbohydrates. Plant resources employed in the local treatment of epilepsy in Etche were documented. Further research on isolation of active compounds on frequently used plants for epilepsy is encouraged to harness their potentials

Schlieren visualisation and measurement of axisymmetric disturbances

International audienceSynthetic schlieren is a new technique that allows one easily and inexpensively to visualise density variations, such as those caused by internal waves propagating in a density stratified fluid. In the special case of two-dimensional internal waves (for example, those created by an oscillating cylinder), synthetic schlieren allows one to measure non-intrusively the wave amplitudes everywhere in space and time. The technique works by measuring the apparent displacement of points in a digitised image (such as a grid of horizontal lines), which is observed by a CCD camera through the experimental test section. Synthetic schlieren is sufficiently sensitive that it can measure sub-pixel-scale disturbances. In this work, we report on the first step toward measuring fully three-dimensional disturbances. We perform laboratory experiments in which internal waves are generated in a uniformly salt-stratified fluid by a vertically oscillating sphere. Theory predicts that the resulting wave-field is in the form of two cones emanating above and below the sphere. Using inverse tomographic techniques, we exploit the axisymmetry of the wave-field to relate the apparent displacement of pixels in an image to the wave amplitudes

Morphometric Observations of the tongue of the domestic duck (Anas platyrhynchos domestica).

A Biometric study was conducted on the tongue of twenty-five (25) adult domestic duck collected from the Sokoto metropolitan poultry and fish modern market, over a period of seven days . A pair of scissors, a scalpel and a blade was used to incise, excise, separate or debride various parts of the oral cavity to expose the organ for research. Results showed that the tongue is characterized by an elongated triangular format. At a point, approximately 2/3 the length of the lingual corpus there is a distinct depression, separating the caudal one-third of the lingual corpus from its rostral two-third. On the dorsal surface of the apex and body of the tongue, a median groove is found. A unique feature of the tongue in domestic Duck is the presence of many fine overlapping needle-shaped processes at both lateral sides of the caudal lingual apex. A single row of large conical papillae is observed symmetrically in the marginal region between the body and root of the tongue. Biometrically the mean dimensio

Kinetics and Mechanism of the Oxidation of Orange II by Chlorate Ion in Aqueous Hydrochloric Acid

Communication in Physical Sciences 2020, 5(2):165-170 Authors: B. Myek, S. O. Idris, A. D. Onu and M. K. Yakubu Received 05 March 2020/Accepted 03 May 2020 The kinetics of the oxidation of orange II (OR-) by ClO3-was studied in aqueous hydrochloric acid where the ionic strength and other parameters of the reaction mixture was, I = 0.50 mol dm-3 (NaCl), [H+] = 5.0 10-2 mol dm-3 (HCl) and T = 21 +/_ 1o C. The redox reaction displayed a stoichiometry of 1:2 and obeys the rate law given as,−????[????????−]/???????? = ????[????][????????][???????????? ]. The observed second order rate constant was found to increases with increase in hydrogen ion concentration. The rates of reaction displayed a zero salt effect and was inhibited by some added cations and anions. From the Michaelis-Menton Buck plot, there was no evidence for the formation of intermediate during the course of the reaction. Based on the results obtained, the outersphere mechanism was proposed for the reaction.&nbsp