الفهرس 
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Abstract
Alfalfa and Egyptian clover are important forage and animal feed crops in Egypt. These crops are unique among field crop agroecosystems.
Cultivated fields of these crops support numerous arthropod species and they are generally considerd good reservoirs for certain potentially destructive phytophagous insect pests, as well as, naturallyyoccurring biocontrol agents especially arthropod predators and parasitoids.
On the other hand, in Egypt broad bean is one of the most sources of proteins for human and animal nutrition. Faba bean plants are attack by several insect pests. The broad bean beetle, B. rujimanus is considerd one of the most economic pest infesting faba bean.
The results of these studieds could be summarized as follows:
Effect of alfalfa and Egyptian clover structural niches on the diversity of selected arthropods:
1- Faunistic composition of arthropods associated with alfalfa and clover plants as forage crops:
Survey of arthropods associated with alfalfa and clover fieds in Mallawi region, Minia Governorate, Middle Egypt indicated the presence of 39 species belonging to 23 familes affiliated to 12 orders. Among the survayed arthropods, 23 species were regards as insect pests, 14 species plus true spiders are known predators, 2 species are pollinators and visitors.
2- Field studies on major pests infesting alfalfa and clover fields and their associated predators:
2-1 Dominant degree of certain insect pests, predators and pollinators associated with alfalfa and clover fields:
2-1-1 Dminant degree of certain insect pests, associated with alfalfa fields:
The data clear that, the most dominant and serious species are A. gossypii, T. tabaci, Empoasca spp., M persicae and H brunneipennis. These species representing about 73.91,78.86 and 84.19% in 2003/2004, 2004/2005 and 2005/2006, respectively.
Other species ( 2003/ 2004, 200412005
The data also indicated that the subdominant species infesting alfalfa plants were S. lividipes, N viridula, A. craccivora and B. tabaci. These species comprise about 5.6, 6.01 and 4.71% in 2003/2004, 2004/2005 and 2005/2006, respectively.
Other species (10 ;species) representing about 0.63, 0.48 and 0.29% in 2003/2004, 2004/2005 and 2005/2006, respectively.
2-1-3 Dominant degJ fields:
The data sl
undecimpunctata, P.
Scymnus syriacus, I were considerd a St Other predators SI representing 0.63, 2003/2004, 2004/2
2-1-4 Dominant I fields:
2-1-2 Dominant degree of certain insect pests species associated with clover fields: