abstract pythium aphanidermatum is one of the most important agent of root and foot rot of cucumber, particularly in the warm humid climate. induction of host resistance by microorganisms or by the synthetic compounds is recently considered as one of the biological control method of disease. trichoderma harzianum bi is a good candidate for induction of resistance in plant against diseases. the ...

Historically, root diseases have been a production-limiting problem for the strawberry industry worldwide. Even though this disease is of great economic importance, etiology remains unresolved. However, soilborne fungal pathogens, particularly Pythium and Rhizoctonia spp. implicated as major role players. Presence nematodes in soil favourable environmental conditions also play significant devel...

objective: the aim of this study was to estimate genetic variability and phonetic relationships of 50 isolates of p. sojae from iran. methods: during 2005–2007, 142 isolates of phytophthora sojae were collected from soil samples and diseased soybean plants from lorestan, mazandaran, golestan and ardabil provinces. races of the isolates were determined. dna of p. sojae fifty isolates was amplifi...

One root disease complex often associated with strawberry plants grown in nonfumigated soil is referred to as black root rot. While not currently a widespread problem in properly fumigated commercial production fields, with the impending phase out of the use of methyl bromide and alteration of current fumigation practices this disease complex may once again become a problem. In other strawberry...

One of the major diseases shallots is basal rot disease caused by Fusarium oxysporum f.sp. cepae (FOC). Biocontrol agents can be used as an environmentally friendly control method. Some yeasts isolated from rhizosphere may have potencies to soilborne plant pathogen such FOC. This study was objected obtain yeast isolates that rot. The first step isolation and were then tested for their in suppre...

abstract the pythium spp. are known as the principle agents of seedling blight, damping-off and root rot of cucurbits. this study was performed for determination of pythium species involved in this diseases as well study their pathogenecity on different cucurbits. the numerous samples were taken at cultivation seasons 2006- 2007 from the fields of cucumber, tomato, egg plant, muskmelon, cucurbi...

Charcoal rot of sorghum caused by the fungus Macrophomina phaseolina is a root & stalk rot disease of great destructive potential in most sorghum glowing regions. Improved, high yielding cultivars under great management tends to be very susceptible to the disease. M.phaseolina is a common soil borne, non aggressive and plurevourous pathogen that attacks plants. Whose vigor has been reduced by u...

The increasing number and proportion of aged individuals in the population warrants knowledge of normal physiological changes of left ventricular (LV) biomechanics with advancing age. LV twist describes the instantaneous circumferential motion of the apex with respect to the base of the heart and has an important role in LV ejection and filling. This study sought to investigate the biomechanics...

The effect of calcium on saprophytic growth and pathogenicity of Phytophthora cinnamomi Rands was studied as well as the influence of calcium on the resistance of avocado to root rot caused by the pathogen. Saprophytic growth of the pathogen was increased significantly by calcium, although the pathogenicity of the fungus was not influenced significantly. Ungrafted Edranol, Duke 7 and Martin Gra...