Tar oil was prepared as soluble liquid 95% and evaluated against the two spotted spider mite, Tetranychus urticae (Koch) infesting soybean plants (Glycin max) in Beni Suef Governorate and its associated predacious mites at different concentrations 1, 1.5 and 2% (V./V.). Its acaricidal effect increased with increasing concentration and time after application up to 12 days. 2% concentration was suitable for controlling the two spotted spider mite, T. urticae with less effect against predacious mites.

I 'q*".number of mites are known associated with different varieties of date palm throughout the world. Their distributional pattern is, however not constant eve4rwhere, which varies according to climatic factors. These mite species could be either Phytophagous, Parasitic, Predators, Phoresy in addition to" suproptugous and Fungivorous species' In this study 37 mite species representing 31 genera, 17 families, three Sub-ordeis, ictinedida; Gamasida and Acaridida were recorded. These mite species were c-lasiified according to their feeding habiis into four categories; plant feeders of both leaves and fruits, parasitic and predaceous that ptay irole as bioconirol ut"nir or different insect and mite pests and fungivorous as well as those of uncertain f""aing behavior. The poluiation fluctuation of the phyophagous mites; Eutetranychus orientol.is; oligonychus ajrasiaricus (Tetranychid:;;;; ";;;;i;" irri), PJ.wllo-tetrlnychus aegyptiacas Sayed (Tenuipalpidae) on sewi variery"was higher than o.r Zughtort variety as well as in Gila thq in Sohag during the two seasons, 2010-and,2011. The popiation oipredac"or, *a"furusitic mites associated with different pests infesting date palm increased.as well as the poiulation of pests increased. Therefore, the biocontrol agents suppress the populations of different pests in both varieties of date palrnin the two localities

No abstract

Three field experiments were conducted during the season 2006, at the private farm at Nubaria region: the first trial included releasing the predatory mite Phytoseiulus persimilis (A.-H.) with rate of 15-20 mites / hill. While the other trials included evaluation of some environmentally safe materials and study the effect of different fertilizers adding in different ways on spider mites population. Obtained results cleared that the predatory mite P. Persimilis minimizing the spider mites population 72.8% after 9 weeks of releasing and the infestation level was under threshold level during the season .The environmental safe compounds indicated that mixture of Vertimec and Super-misrona mineral oil exhibited the highest reduction (91.4%) followed by Vertemic (87.5%), mineral oil (72.9%), Oshar extract (58.4%), Enab El-Deab extract (54.6%) and Bioranza (53.6%).Foliar application of KP and micro-elements reduced the mite population (52.8 and 50.7 %) while soil spray bacteria solubility of potassium and phosphorus gave (43.7 and 12.9 %) ,respectively. It's cleared that different fertilizes were minemized the number of mites and also they improved plant health and crop yield.

Field and laboratory trials were carried out to evaluate six maize hybrids of each single and three-way crosses for their relative susceptibility to spider mite, Tetranychus urticae Koch infestation, in relation to leaves phytochemical analysis. Obtained data cleared that the triple hybrids were more infestation than single crosses hybrids during the course of study. The level infestation of single crosses hybrids could be divided into two categories; resistance and moderate infestation, while the triple crosses hybrids could be divided into three categories, moderate, susceptible and highly susceptible to spider mite infestation. Phytochemical components, the total carbohydrates, total protein, nitrogen, phosphorus and potassium were estimated and demonstrated that there were correlation between spider mite level infestation and leaves phytochemical constituents.