الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
 |  | from | 103 |  |  |
| | | from | 103 | | |
Abstract
Studies on the effect of Egyptian clover and alfalfa structural es on the diversity of selected arthropods (Insecta and Araneida)”.
Alfalfa and Egyptian clover are important forage and animal feed crops in A.R.E. These crops are unique among field crop
)groecosystems. The former represents a relatively long-lasting, well
frstablished perennial systems that has been planted as a fodder crop in
relatively large areas in newly-reclaimed desert ecosytems. Clover, on
the other hand, is an annual that has been traditionally planted in the typical valley agroecosy stems.
,J1 H
Cultivated fields of these crops support numerous arthropod
species (Insecta and Araneida) and they are generally considcred good rvoires for certain potentially destructive phytophagous msecl pests
as well as naturally-occurring biocontrol agents especially arthropod
?redators and parasitoids. -
Therefore, this study was initiated to relate the plant structural diversity (foliage and blooming stages) to species composition of
selected predaceous Heteroptera: Oriu.s (Anthocoridae), Nabis (Nabidae), Geocoris (Lygaeidae) and Deraeocoris (Miridae). Thus, the
prime objective of this study is to relate the plant structural niches in time (growing seasons) and in space (Nile Valley and semi-arid
I ecosystems) to species diversity represented in these ecosystems.