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Abstract. Fruit flies (Diptera: Tephritidae) are amongst the world's worst pests of fruits that cause enormous losses in orchards. Due to their economic importance, fruit flies are severe pests of Mango Mangifera indica L. fruit, and their monitoring and infestation estimation are essential in order to formulate integrated pest management program. For practical field implementation, two variables such as flies per trap per weak were monitored by installation of Steiner traps hung on tree baited with Methyl eugenol attractant and percent fruit infestation through fruit host samplings. Surveillance for flies per trap was done each week by counting trap catches, recording and removing any flies that have been collected in traps and identifying the species. The percentage of fly infestation for mango fruit was examined by randomly analyzing a total of 100 fruits and observing number of fruits showing fruit fly oviposition or injury marks. The results showed that tephritid fruit fly Bactrocera zonata (Saunders) was the predominant species (more frequent and constant) at experimental site. Surveillance of fruit fly populations in mango orchard revealed that peak population of B. zonata (40-30 per trap per week) and fruit infestation (9.05-7.45%) were recorded in June, July and August. The availability of host fruit and its productivity were critical factors affecting population fluctuations of the B. zonata fly. All of this information gives fruit fly activity in an area, an estimate of the population, species composition, sex, growth stage and determining whether the number of pests are increasing or decreasing to decide implementation of pest control operation.

seasons to study the effect of chicken manure fertilizer rates (0, 3 and 6 ton.fed-1) on yield and its components of some barley cultivars. The experimental design was randomized complete block design (RCBD) in split plot arrangement. The results indicated that Giza 123 and Giza 134 were superior the rest cultivars in almost studied traits. Increasing rates of chicken fertilizer from 0 to 3 or 6 ton.fed-1 resulted in an increase in all studied traits under this study except harvest index which was decreased. The interaction affects significantly biological yield and spike length in both seasons, while for grain yield was in the first season, and straw yield in the second season. The application of chicken manure by the rate of 3 or 6 ton.fed-1 reducing the mean values of soil pH and calcium carbonate (CaCO 3) content after the first and second seasons. On the other hand, the electric conductivity (EC) and organic matter (OM) levels were significant increased with increasing the level of chicken manure. The high level of chicken manure (6 ton.fed-1) gave the highest mean values of N, P, and K after the first season than the second season.