The olive leaf moth Palpita unionalis (Lepidoptera: Pyralidae) is an economic pest of the commercial olive groves in Egypt and different Mediterranean countries. The present study was conducted aiming to assess the effects of Novaluron, a chitin synthesis inhibitor, on survival, growth, development and metamorphosis of this pest. The newly moulted last instar (6th) larvae had been treated with six concentrations (100.0, 10.0, 1.00, 0.10, 0.01 and 0.001 ppm), via the fresh olive leaves, as food. Different degrees of toxicity were recorded on all developmental stages. LC 50 was calculated in 0.97 ppm. The somatic weight gain of larvae was drastically reduced and the larval growth rate was severely regressed, regardless the concentration. The larval duration was generally shortened but the pupal duration was remarkably prolonged, in a dosedependent manner. The pupation rate was regressed, especially at the higher four concentrations. The metamorphosis program was impaired, since larvalpupal intermediates had been produced at some concentrations. In addition, the pupal morphogenesis was disrupted, since some pupal deformities had been observed at some concentrations.

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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 greater wax moth, Galleria mellonella is an important pest of wax combs of the honey bee in the world. The current investigation aimed to assess the effects of Apitoxin on the most important adult life parameters and reproduction of this pest. The freshly ecdysed 3 rd instar larvae were treated with a series of Apitoxin concentrations (4000, 2000, 1000, 500, 250, 125 ppm) via the artificial diet. The present results can be summarized as follows. The adult emergence was slightly blocked only at the higher three concentration levels. Apitoxin failed to affect both adult survival and morphogenesis. The total longevity was significantly shortened, in a dosedependent course. The ovarian maturation (pre-oviposition) period was prolonged, except the highest one at which this period was slightly shortened, as an odd datum. The reproductive lifetime (oviposition period) was remarkably shortened, in no certain trend. Also, the post-oviposition period was considerably shortened. Apitoxin exerted a diverse action on the reproductive efficiency of adult females since the oviposition rate was enhanced or inhibited, depending on the concentration, but in no certain trend. Both fecundity and fertility had been significantly reduced, in a dose-dependent course. The incubation period was considerably prolonged in a dose-dependent manner.