الفهرس 
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Abstract
Wheat is considered one of the most important cereal crops m
Egypt and in most of the world countries. The annual production of
wheat in Egypt is estimated by approx. 4.6 million ton. The total acarage
grown to wheat (Ca. 2.1 million Faddan.) during 1993/1994. The balance
amount (Ca. 5.4 million ton) is imported therefore from the principale
wheat producing countries. Imported amounts are subject to progressive
annual rise to meet the rapid increase in population.
Wheat is attacked with many diseases in Egypt, i.e. rusts, smuts,
barley yellow dwarf (BYD) Powdry mildew and other diseases of minor
importance. Most of the new released wheat cvs. are considered to be
resistant to loose smut. However an infection with the disease has been
recorded during 1984/85 on the two wheat commercials i.e Sakha 61 and
Salcha 69 and thereafter, on the wheat cv. Giza 163. Consequently, it was
necessary to study that disease in Egypt, since the available references
lacked to such study.
The present study aimed at identifying the physiological races of
the pathogen in Egypt. Histological studies were carried out aiming at
following up and detecting the smut mycelium in the tested embr)ros and
seedlings. Inheritance of resistance to loose smut was one of the main
objective of this study for its importance in selection and breeding of
wheat against the pathogen in certain local wheat cvs. Some physiological
changes associated with the disease i.e. enzymatic activity (Peroxidase
l!i