Ultrastructure study revealed two types of fly larvae Przhevalskiana silenus (Brauer, 1858) and Cochliomyia hominivorax (Coquerel, 1858) that causes myasis in Goats in Saudi Arabia, The study recorded that the exact composition of these two genus showed differences in morphological characteristics, which cannot be identified using an optical microscope. All previous studies recorded on the same region never before carried out ultrastracture studied.

This study presents the Mallophaga and Anoplura lice which affects farm animals (camels sheep and goats), a local area east of the Saudi Arabia of different ages, races, classes. Study the classification of lice were recorded as using the optical microscope and electronic scanning. The study shows scanning electron microscopy micro-structure of the species: Bovicola(Damalinia) ovis, Linognathus africanus and the study showed the installation of a portfolio of head lice, and the distribution of filament head, chest and abdomen, as shown over the centuries, the difference in the form of remote sensing and Swallows in the sexual lice, the first study in this area.

Farm animals have a high economic importance because of their important products such as meat, milk, hair as well as skin, not only in our country but also all over the world. These animals can be infected by serious pathogens, external and   internal parasites causing severe damage, which result in losses of animal production. Accordingly, the study of external parasites with light microscope and scanning electron microscope were recorded, to clarify the exact composition of species. Also, differences in the morphological characteristics between the two Myiasis species: Oestrus ovis (Linnaeus, 1758)and Cephalopina titillator (Clark 1797), were investigated.

Vegetable production provide great value in the agricultural production sector in the Kingdom of Saudi Arabia. Growers and agricultural engineers need a comprehensive database in Arabic lan-guage that can be available for use any time any where. Therefore, this research project was initiat-ed. The computer program was developed using Visual Basic Net 2005 which is one of the ad-vanced visual programming languages. We took into consideration easy usage and coherence be-tween all program components. Main results in-clude computer program with the data base, which includes: vegetable crops, diseases, insect pests and other pests that attacks vegetable crops, management tactics, cultural practices, irrigation requirements, planting dates, data search. Fur-thermore, field trips have been carried out to some vegetable farms in all the Kingdom regions. A digit-ized map of the Kingdom has been added to the program in addition to crop water and heat re-quirements. Various search capabilities have been developed in the program. After the completion of the program build up, verification trips have been carried out for five regions in the presence of farm-ers and extension specialists of the different direc-torate of the Ministry of Agriculture to test the accu-racy of steps used in the program. A manual for the computer program as well as leaflet on pro-gram set up and usage have been included. It is recommended to make this program available at the internet and distribute copies to the Ministry of Agriculture and its directorates as well as farmers.

The red palm weevil (RPW) Rhynchophorus ferrugineus (Coleoptera: Curculionidae) is the most destructive pest of date palm Phoenix dactylifera L. in Middle East particularly in ArabGulf countries. Distribution of RPW infestations in relation to some factors was studied in date palm farms in Qatif Governorate, EasternSaudi Arabia. For these studies, 80 farms containing over 11000 date-palm trees were inspected. A scale for grading the infestation severity was developed. Numerical, but not statistical differences were in infestation levels with RPW, were found among farms due to their location (desert or oasis), irrigation system (dripping or flooding), intercropping (with or without) and pruning condition (pruned or unpruned). However, too small farms (less than 100 palm trees/farm) or too large farms (over 1000 trees) were highly infested while farms of 400-800 trees/farm were the least infested. Over 42% of infestations were concentrated at or below the soil surface. Light or surface infestations formed 45% while severe or deep infestations formed 19% of total infestations. Trees of 5-10 years old were the most infested while trees over 15 years were the least infested.

The present work aimed to investigate the stimulating and attractive effects of five volatile oils on honey bee colonies food consumption. These oils were added to sugar syrup and pollen substitutes. The consumption of sugar syrup and percentage of dead bees in caged honeybee work-ers were determined. Multi-choice test inside the honey bee colonies was carried out to determine the food consumption rate from different pollen substitutes. Positive effect was recorded by adding Coriander oil 0.03% followed by Fennel 0.15% and Spearmint oils 0.03% while nigella oil showed a repellent effect on honey bee workers. The mor-tality percentage was very low with no significant differences between treatments. Results indicated that addition of 5% pollen grains and three volatile oils increased significantly pollen substitute’s con-sumption. The highest consumption rate was rec-orded with coriander oil 0.03%. Results obtained indicated that the consumption of diets that con-tain Coriander, Fennel, and Spearmint volatile oils was more successful than control.