Studies on some root rots fungal diseases of turfgrass in Egypt and their control
2012
El-Hareedy, A.M.
Some factors were evaluated for controlling root rots affecting ýPaspalum vaginatum plants. Fungi belonging to 10 genera were isolated ýfrom the diseased plants. The survey showed a difference in the ýfrequency of the isolated fungi. In general, Fusarium semitectum, ýHelminthosporium tetrmera, Macrophomina phaseolina, Pythium ýsplendens and Rhizoctonia solani were found to be the most frequently ýisolated fungi. The percentages of post-emergence damping-off caused ýby the tested fungi were decreased by using all the tested treatments ýcompared with the check ones. Some of physiological studies were ýcarried out using the tested fungi. Several rates of inoculum potential of ýthe tested fungi were studied and found that the percentages of 3 and ýý4% were the favourable inoculums since they gave 50% infested plants. ýThe root exudates of paspalum plants help fungi to growth under ýspecific conditions. Irrigation regime has an effect on plant health and ýthe daily irrigation is the favorite one. Fertilization with nitrogen ýsources such as urea, ammonium and ammonium nitrate were ýevaluated. Biofertilization, such as microbin, phosphoren and ýpotassiumag were studied using the tested fungi in vitro and in vivo. ýChitosan and salicylic were also studied in vitro and in vivo. Each of ýchemical and biological control were studied on paspalum plant in vitro ýand in vivo.ý
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