Grain sorghum [_Sorghum bicolor_ L. (Moench)] is subjected to infection by certain diseases causing great and substantial damage to the crop. _Fusarium_ stalk rot of sorghum caused by _F_. _moniliforme_ (J. Sheld) represents the common stalk rot in Egypt and many areas of the world. The tested sorghum cultivars reacted differently to _F.__moniliforme_ in the two tested seasons. Giza15 sorghum ... إقراء المزيد

_Fusarium verticilliodes_ (Sacc.) Nirenberg (G) is a well known phytopathogenic fungus capable to infect a wide range of plants including maize. In addition; its toxic metabolites fumonisin (FB1 and FB2) are associated with Equina Leukoencephalo Malacia and induced hepatotoxic and carcinogenic effects in animals. Twenty two isolates of _F. verticilliodes_ obtained from corn samples and grown on Barley medium, were ... إقراء المزيد

_Fusarium_ fungi, including _F. graminearum_, cause seedling blight, foot rot and head blight diseases in wheat resulting in yield loss. Trichothecene mycotoxins are a group of toxic fungal secondary metabolites. This group of toxins is found associated with _Fusarium_ diseases in wheat in numerous countries worldwide. Five isolates of _F. graminearum_ were examined for their degree of disease severity (virulence) ... إقراء المزيد

The effect of lime, thyme, comphore oils against _Penicillium digitatum_, the causes of green mould disease of orange fruits, was evaluated for their inhibitory effect _In vitro_ and _In vivo_ during storage conditions. _In vitro_ experiments, different concentration of each essential oil at 1, 5 and 10% (v/v) was tested on the growth of _P. digitatum_. The best concentration at ... إقراء المزيد

_Fusarium oxysporum_ f.sp. _fabae_ (Schlecht) Snyder &.Hansen (FOF) is a serious pathogen on faba bean causing wilt disease. In greenhouse experiments, the three tested isolates of the pathogen were differed in their virulence on faba bean cultivars (Giza 29, Giza 4 and Misr 1). Isolate (FF1) was the most virulent one. Faba bean cultivars reacted differently to the infection by ... إقراء المزيد

المطلوب من طلاب المستوي الثاني تجميع بعض النباتات التي يظهر عليها أعراض مرضية تمهديا لاجراء الاختبارات المعملية المختلفة عليها لمحاولة الحصول علي الفطريات المسببة من هذه العينات إقراء المزيد

المطلوب من طلاب المستوي الثالث تجميع عينات من التربة بهدف عزل وتنقية أنواع من الميكروبات التي لها قابلية للاستخدام كمقاوم حيوي تمهيدا لاجراء الاختبارات المعملية عليها . تعقيم أطباق بترى وعمل البيئة اللازمة لعزل الميكروبات من العينات التى تم جمعها. إقراء المزيد