الفهرس 
Disease surveyOnly 14 pages are availabe for public view
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Abstract
Soilborne fungi causing root rot and wilt diseases on geranium plants in Beni- Suief, Minia and Fayoum governorates were found to be of great importance in
Egypt, since they caused economic losses in stand, plant growth parameters and oil yield. Using fungicides in minimizing disease losses and in maximizimg plant yield is the main strategy in Egypt. Unfortunately, use of the chemical fungicides posed a serious threat to human beings and environment. Therefore, the present study is aiming to define some effectives, safe measures to control these important diseases under naturally and artificially infested soil. The main findings of this study may be summarized as followes : (1) Root rot and /or wilt fungal diseases were always detected in fields of ten districts of Beni-Suief , Minia and Fayoum governorates during 2008/2009 and 2009/2010 seasons. Mean percentages of infection on (2, 4, 7&12 months - old) during the two seasons ranged between (25.3, 22.3, 28.6, 30.7 %) respectively. (2) During the experimental course of isolation, infected cuttings and plants yield six identified fungi i.e.Fusarium oniliforme,F.oxysporum, F.semitectum,
F.solani,M phaseolina and Rhizoctonia solani. F.oxysporum (21.62%) and F. moniliforme (19.31%), however, were the most frequently fungi isolated from infected
cuttings, followed by F.semitectum (15.44%) and F.solani (12.74%). whereas, F.oxysporum (21.50%) and R.solani (21.17%) gave the highest occurrence (%)
from root rotted and or wilted plants, followed by F.semitectum (18.89%) and F. moniliforme (17.92%) In contrast, M.phaseolina (11.58%), M.phaseolina (9.77%) and F.solani (10.75%) were isolated at low frequencies plants, respectively. (3) Results of laboratory experiments : Production of root rot and wilt-free pelargonium plants
using tissue culture technique through three stages (starting stage,multiplication and rooting stage ) and then adaptation process in green house before transferring to the open field . (3) Under greenhouse conditions: Root rotted and / or wilted plants caused by F.oxysporum, F.semitectum , R.solani and F.solani were significantly lower in most cases ,than the control with all control measures tested,i.e.biofertilizers ( Biogen , Nitrobien & Rhizobacterein), plant extracts and essential oils (marjoram & thyme ), biocides (Rizo N & Plant Guard ), fungicides (Topsin M& Vitavax - Thiram) , /
Ascopien , Potasien, Yeast , Garlic , Micro elements and Macro elements . Rizo – N and Topsin M were superior in decreasing infection (%) than the other treatments.