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In a field survey, 16 eriophyoid mite species were collected from eight species of fruit trees, among which two species were found to be new record to Egypt. They were Tegolophus guavae (Boczek, 1960) on Psidium guajava L. (Myrtaceae) which causes rust on leaves, and Aceria ziziphi Mohanasundaram, 1990, vagrant without damage on Ziziphus spina-christi Willd (Rhamnaceae). These species were redescribed and illustrated from local material. A total of 65 eriophyoid mite species in superfamily Eriophyoidea has been recorded in Egypt due to literature. These species belong to three families, seven sub families, seven tribes and 27 genera. A list of these species has been constructed and presented herein.

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A new eriophyoid mite species, Heterotergum zaheri sp. nov. from Ziziphus spina-christi (L.) Desf (Rhamnaceae) is described and illustrated. This mite is vagrant in the tender apical shoots (between hairs) and on the lower surface of young leaves. It causes no apparent damage. In addition, a supplementary description of Vittacus bougainvilleae (Keifer, 1959) comb. nov. (transferred from Phyllocoptes), is provided; it is recorded for the first time in Egypt, infesting Bougainvillea glabra Choisy (Nyctaginaceae). Moreover, Aculops guajavae Abou-Awad, Al-Azzazy & Afia, 2016, which causes rust on terminal leaves of Psidium guajava L. (Myrtaceae), is set as a junior synonym of Tegolophus guavae (Boczek, 1960) and redescribed.

Developmental times and reproduction rates of the date palm dust mite Oligonychus afrasiaticus (McG.) were studied on three different date Palm tree parts (i.e. kamry fruit stage (characterized by the green color of fruits), yellow khelal stage and inner frond) of Khalas variety at laboratory conditions of 15, 25 & 35 ± 2°C; 30 & 70 ± 5% R.H. and 16:8 L:D. The mite failed to develop at 15°C. Immatures developmental time was fastest on kamry stage (10.60 days) followed by yellow khelal (12.35 days) then inner fronds (12.71 days). Adult female longevity averaged 15.08, 14.62 and 13.83 days on kamry and khelal yellow stages and inner frond, respectively. The shortest generation time was 9.5, 11.32 and 16.04 days at 35°C & 30% R.H., while the longest was 22.74, 26.74 and 26.68 days at 25°C & 70% R.H. on kamry, yellow khelal stage and inner frond; respectively. Sex ratio was affected by temperature as proportion of females increased with temperature increase. In addition, the values of r m , R 0 and λ increased with temperature increase and decreased with R.H. increase. The mean generation time (T) and generation doubling time (DT) values decreased with temperature increase and R.H. decrease; thus the reproduction of mite increase. This mite favored high temperature and low R.H. Also immature date (kamry stage) was the favorable followed by yellow khelal then inner frond.

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.

The objective of this study was to evaluate the toxicity and repellency effect of Rosemary, Rosmarinus officinalis L. (herb) and Coriander, Coriandrum sativum L. (fruits) essential oils against Eutetranychus orientalis (Klein). Essential oils were extracted using aqueous extract. The chemical composition of the extracted essential oils was characterized by GC. The main components were Linalool and camphor, respectively. Concentrations of 0.5, 1, 2, 3 and 4% were tested. Results indicated significant differences in efficiency of the tested essential oils on the developmental stages of E. orientalis. Coriander essential oil was more toxic for controlling different stages of E. orientalis than Rosemary ones. For eggs, LC50 and LC90 were 4.82%, while for Rosemary; it was 1.49 and 7.94%, respectively after 7 days. Relative values after 3 days for larval stage were: 0.160, 1.340, 0.280 and 20.080 respectively. For nymphal stage relative values were: 0.21, 1.52, 0.20 and 4.37. For adult stage relative values were: 0.77, 4.09, 0.37 and 6.10, respectively. It was concluded that Coriander essential oil was more potent to E. orientalis than Rosemary ones. Repellency of different tested concentrations for adult females indicated significant effects of the two oils, concentration and time. Coriander was significantly more repellant than Rosemary. Repellency significantly increased with concentration increased and decreased by time increase. It was concluded that Coriander and Rosemary essential oils could potentially used for the management of E. orientalis. More efforts are suggested to evaluate these oils and their components as natural ones for controlling this pest.

The invasive weed cogon grass Imperata cylindrica (Poaceae) is a perennial grass not only in crops but also in natural areas, causing economic and environmental damages. In this paper, five new eriophyoid mites (subfamily Phyllocoptinae) infesting Imperata cylindrica are described from Egypt: three new species from genus Abacarus (A. imperatus sp. nov., A. aegyptiacus sp. nov., and A. gizaensis sp. nov.) and two new species from genus Aculodes (A. tinaniensis sp. nov. and A. skorackae sp. nov.). These species are vagrants in grooves between veins on the upper leaf surface; no visible damage was observed. However, A. gizaensis was found wandering mainly on upper young leaves, often near the tips causing discoloration of the leaves. Both adult sexes and immature stages are described and illustrated. The genus Aculodes is recorded from Egypt for the first time.