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

Two bio-insecticides, Biomctin and Tracer were evaluated for their toxicity as baits against peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae), in the laboratory, also their effects on some biochemical constituts of the fly were investigated. The results showed that, both Biomectin and Tracer showed toxic effects to B. zonata flies with LC 50 values of 2.39, 0.45 and 87.62, 5.61 ppm and LC 90 to 849, 83.85 and 11359, 139.45 ppm at 24 hrs and 48 hrs, for Biomctin and Tracer respectively. Results of biochemical analysis showed that, the amount of protein level decreased in treated flies to 54.5 and 29.2 mg/g. b.wt of Biomectin and Tracer respectively compared to 61.1mg/g. b.wt in the control. The activity of acetylcholine esterase also decrease in treated individuals to 692 and 727 µg/g.b.wt respectively compared to untreated ones 738 mg/g.b.wt. Level of alpha-esterases increased to 730.7 and 573 µg/g.b.wt. compared to control flies to 563.3 µg.g.b.wt. while the amount of beta-esterase showed no significant difference 193 and 182 µg/g.b.wt respectively after treatment compared to 189 µg/g.b.wt in the untreated flies. The amount of glutamic oxaloacetic transaminase (GOT) decreased in treated flies 28.7 and 43.7 Ux 10 3 /g.b.wt less than the untreated 113.3 Ux 10 3 /g.b.wt, while the amount of glutamic pyruvic transaminase (GPT) increased after treatment with Biomectin and decreased after treatment with Tracer 2707 and 1582 Ux 10 3 /g.b.wt, respectively compared to control ones 1937 Ux 10 3 /g.b.wt. Level of phenoloxidas increased in treated individuals 19.1 and 17.6 O.D. units/min/g.b.wt, respectively, than control 12.9. Level of lactate dehydrogenase also more in treated flies 718 and574 Ux 10 3 /g.b.wt more than control 496.3 Ux 10 3 /g.b.wt. This study improves that the two biopesticides cause toxic effects and biochemical changes in B. zonata and this may help to use them in its control instead of chemical insecticides.

he objective of this study was to show the susceptibility of different immature stages (eggs, larvae and pupae) of potato tuber moth Phthorimaea operculella (Zeller) (Lepidoptera: Glechiidae) to the entomopathogenic fungus (EPF) Beauveria bassiana, and the effect of irradiating full-grown male pupae of ph. operculella at sub-sterilizing doses 100 and 200 Gy of gamma irradiation (alone and in combination with LC50 of B. bassiana) on some biological aspects of resulting F1 larvae, the results showed that, the EPF B. bassiana was pathogenic to all immature stages with LC50 values of 5.5x10 3 , 28.56 and 1.1x10 5 conidia/ml, respectively, larvae were more susceptible to infection by B. bassiana than eggs and pupae. The percents of larval and pupal mortality were increased as the radiation doses increased while the percents of pupation and adult emergence were decreased as the radiation dose increased. Combination of gamma radiation and B. bassiana was more effective than either treatment of them alone.

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The present study aimed to estimate different stability statistics to evaluate the behavior of some sesame genotypes grown under12 diverse environments in four successive summer seasons of 2011, 2012, 2013 and 2014. Forteen sesame genotypes, in addition to one check cultivar, were planted in three locations of upper Egypt, [Shandaweel (Sohag), El-Mataana (Luxor) and Mallawi (Elmenia)]. The design used was randomized complete blocks design with three replications as well as using four stability methods [Eberhart and Russell (1966), Tai 1971, shukla (1972 and Kang and Magari (1995)]. The studied characters were plant height, length of fruiting zone, number of capsules/ plant,1000 seed weight, seed weight/plant (g) and seed yield (ardeb/fed). Results indicated that the genotypes significantly differed for all the studied traits. Also genotype x environment (GxE) interaction was highly significant for all the studied traits. Genotype No.12 (N.A.653) was phenotypically and genotypically stable using the three stability procedures of Eberhart and Russell (1966), Tai (1971), and Kang and Magari (1995) for plant height. Considering fruiting zone length, genotype No. 4 (B21) was stable using the three stability methods while the genotype No. 6 (N.A. 463) was stable for number of capsules/ plant using the same three methods of stability. Concerning 1000 seed weight, genotype No. 6 (N.A. 463) was stable by using Shukla (1972) and Kang and Magari (1995) methods of stability. The results revealed that genotype No. 5 (Hybrid167), No. 10 (N.A.542) and No.12 (N.A.653) for seed weight/plant, and genotypesNo.4 (B21), No.5 (Hybrid167) and No.10 (N.A.542) for seed yield (ardab/fed), were stable by using two methods of stability Eberhart andRussell, 1966 andMagari, 1995 . In light of the current results, it can be concluded that genotype No. 5 (Hybrid167) may be recommended to be released as a commercial stable genotype for seed weight/plant (g) and seed yield (ardab/fed) by using two methods of stability (Eberhart and Russell (1966) and Kang and Magari (1995), and incorporated to be as a breeding stock in any future breeding program.