Nematodes associated with soybean (Glycine max) in upper Egypt

Dix-sept espèces de nématodes phytoparasites ont été récoltées dans les champs de soja des Gouvernorats de Menia, Assiut et Sohag, en Haute Egypte. Les espèces #Helicotylenchus pseudorobustus, Longidorus pisi, Pratylenchoides ritteri, P. variabilis, rotylenchulus parvus et #Tylenchorhynchus annulatus sont signalées pour la première fois en Egypte. #Merlinius brevidens est rencontré avec une fréquence relativement élevée tandis que #Pratylenchus zeae est présent en populations assez denses. #Meloidogyne javanica, M. incognita, Pratylenchus zeae, H. pseudorobustus, R. parvus et #Xiphinema sp. pourraient également avoir une grande importance dans les champs de soja de Haute Egypte. Les populations de #Meloidogyne javanica et #M. incognita sont plus élevées dans les sols sableux que dans les sols sablo-argileux ou argileux. #Pratylenchus zeae et #M. brevidens sont présents en populations élevées dans les trois types de sol, et plus particulièrement dans les sols sableux. Les populations de #H. pseudorobustus sont relativement élevées dans les sols argileux, tandis que pour #R. parvus les sols sablo-argileux sont plus favorables. (Résumé d'auteur

OSCILLATION of SECOND-ORDER HALF-LINEAR NEUTRAL NONCANONICAL DYNAMIC EQUATIONS

In This Paper, We Shall Establish Some New Criteria for the Oscillation of Certain Second-Order Noncanonical Dynamic Equations with a Sublinear Neutral Term. This Task is Accomplished by Reducing the Involved Nonlinear Dynamic Equation to a Second-Order Linear Dynamic Inequality. We Also Establish Some New Oscillation Theorems Involving Certain Integral Conditions. Three Examples, Illustrating Our Results, Are Presented. Our Results Generalize Results for Corresponding Differential and Difference Equations

The log exponential-power distribution: Properties, estimations and quantile regression model

Recently, bounded distributions have attracted attention. These distributions are frequently used in modeling rate and proportion data sets. In this study, a new alternative model is proposed for modeling bounded data sets. Parameter estimations of the proposed distribution are obtained via maximum likelihood method. In addition, a new regression model is defined under the proposed distribution and its residual analysis is examined. As a result of the empirical studies on real data sets, it is observed that the proposed regression model gives better results than the unit-Weibull and Kumaraswamy regression models

A new flexible family of continuous distributions: the additive Odd-G family

This paper introduces a new family of distributions based on the additive model structure. Three submodels of the proposed family are studied in detail. Two simulation studies were performed to discuss the maximum likelihood estimators of the model parameters. The log location-scale regression model based on a new generalization of the Weibull distribution is introduced. Three datasets were used to show the importance of the proposed family. Based on the empirical results, we concluded that the proposed family is quite competitive compared to other models

The extended gamma distribution with regression model and applications

This paper introduces a new extension of the gamma distribution, named as a new extended gamma distribution, via mixture representation of xgamma and gamma distributions. The statistical properties of the proposed distribution are derived such as moment generating and characteristic functions, variance, skewness, and kurtosis measures, Lorenz curve, and mean residual life function. The maximum likelihood, parametric bootstrap, method of moments, least squares, and weighted least squares estimation methods are considered to obtain the unknown model parameters. The finite sample performance of estimation methods is discussed via a simulation study. Using the proposed distribution, we propose a new regression model for the right-skewed response variable as an alternative to the gamma regression model. Two real data sets are analyzed to convince the readers for the usefulness of the proposed model