The journal of Toxicology and pest control is one of the series issued twice by the Egyptian Academic Journal of Biological Sciences, and is devoted to publication of original papers related to the interaction between insects and their environment. The goal of the journal is to advance the scientific understanding of mechanisms of toxicity. Emphasis will be placed on toxic effects observed at relevant exposures, which have direct impact on safety evaluation and risk assessment. The journal therefore welcomes papers on biology ranging from molecular and cell biology, biochemistry and physiology to ecology and environment, also systematics, microbiology, toxicology, hydrobiology, radiobiology and biotechnology. www.eajbs.eg.net Provided for non-commercial research and education use. Not for reproduction, distribution or commercial use.

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The Aphids, Aphis craccivora (Koch) is a serious pest in agricultural fields in Egypt. Entomopathogenic fungi are biological control agents of insects. The study was carried out on the aphid by using of Bio Catch, Verticillium lecanii, Bio Power, Beauveria bassiana and Bio Magic, Metarhizium anisopliae on A. craccivora. Laboratory experiments were done to measure the pathogenicity of three commercial compounds from entomopathogenic fungi, Bio Catch, V. lecanii, Bio Power, B. bassiana, and Bio Magic, M. anisopliae against adults and nymphs of A. craccivora. Three concentrations were used from all compounds, 107 , 108 and 109 spores/ml. at 22 ± 2°C and 75 ± 5 R.H. The concentration (109 spores/ml.) gave 100% mortality with V. lecanii and B. bassiana then M. anisopliae. The Lowest LC50 value of 2.1 x 106 spores/ml. was recorded by V. lecanii, which showed higher virulence compared to other entomopathogenic fungi. The LC50 values of V. lecanii, B. bassiana and M. anisopliae were 2.1 x 106 , 4.3 x 106 and 6.4 x 107 spores ml., respectively. At the highest concentration of 109 spores/ml., the Median LT50 values for V. lecanii, B. bassiana and M. anisopliae were 4.2, 5.2 and 7.0 days, respectively.

was higher on sandy soil (518 individuals / 120 leaves) than the clay soil (332 individual / 120 leaves), These results revealed significant positive effects of maximum and minimum temperature and DP on population density of P. operculella during the first season 2014 in clay soil and sand soil. The combined effect (E.V) of these ecological factors on P. operculella showed that these factors were responsible as a group for 84 %, 15% and 35 % effects on the population density of P. operculella throughout seasons (2014, 2015 and 2016) in clay and sandy soil , also, these factors were responsible as a group for 72 %, 64% and 26 % effects on the population density.

This study was carried out to study the biology and life table parameters of Duranta aphid, Aphis durantae Theobald under laboratory conditions throughout three different temperatures degrees (winter, spring and summer) during 2018 year. Data obtained showed that the spring season more suitable for A. durantae living (biology) more than winter and summer seasons, respectively. This showed clearly from life table's parameters which showed that the nymphal stages of A. durantae in spring season were less than in winter and summer, respectively. Also, life cycle, mean generation time, live span and longevity duration in spring season were less than in winter and summer seasons respectively. Lastly, the important parameter in the life table, intrinsic rate of increase (rm) in spring season was more than in winter and summer seasons, respectively.