A trial study was managed to estimate the efficacy of neem oil and cinnamic oil on cowpea aphid, Aphis craccivora Koch (Hemiptera: Aphididae) which infest a wide host range of plants caused serious damage. Due to the problems of chemical pesticides to organisms and environment, natural control replaced pesticides. The data obtained in this study showed that neem oil was more effective in controlling A. craccivora where LC 50 was 125.26 ppm comparing with cinnamic oil which LC 50 recorded 378.68 ppm. GC/ MS analysis of Neem oil showed the presence of saturated and unsaturated fatty acids by 99.34%, where it was found to contained eight different fatty acids. The linoleic acid represents the highly proportion with 34.69%.

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

The biological aspects and life table parameters of the spider mite, Tetranychus urticae Koch were studied under laboratory conditions on two kinds of host plants, tomato leaves and cucumber leaves. The study showed that the incubation period, the total immature stages, life cycle and generation of T. urticae on tomato leaves were higher than them on cucumber leaves. The life cycle was 13.58 and 9.52 days on tomato leaves and cucumber leaves, respectively. The generation period was 15.91 and 11.19 days on tomato leaves and cucumber leaves, respectively. On the other hand, longevity and life span of T. urticae were higher on cucumber than on tomato. Longevity was 15.33 and 19.97 days on tomato leaves and cucumber leaves, respectively. The life span was 28.91 and 29.49 days on tomato leaves and cucumber leaves, respectively. Also, the daily main number of laid eggs was higher on cucumber, 5.36, than on tomato, 4.71. Also, the results demonstrated that the population of T. urticae had the ability to multiply about 1.91 and 2.53 on tomato and cucumber leaves, respectively.

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

A trial study was conducted to evaluate the impact of using magnetized sea water MSW on the adult emergence of E. zinckenella and to monitor the effect of MSW on M. incognita infecting cowpea plant. A total numbers of E. zinckenella pupa were incubation on plastic containers including soil irrigation with MSW in three concentrations. Although results indicated that, the magnetic concentrations were low, the mortality rate of the E. zinckenella pupa was high on the other hand, when the concentrations increased, the total mortality was increased. Total mortality of pupal stage was 13.75 %, 32.5% and 41.25 %, respectively when, using of magnetic sea water in concentrations 10, 20 and 40 ml.t compared with untreated treatment.In addition, this experiment was carried out to evaluate the effects of magnetizing irrigation water on naturally growing of cowpea infected with root-knot nematode M. incognita in sandy soil at three concentrations 10, 20 and 40 ml.t. The obtained results indicated that irrigation cowpea plants with magnetic water induced positive significant effect on the most of studied parameters. The percentage improvement ranged between 63.33, 78 and 97.97, 94.59 in fresh and dry weight.