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...

many fungi cause sugar beet root rot during various stages of the plant growth. among them rhizoctonia spp. induce crown rot, dry rot and violet root rot on sugar beet (whitney and duffos,1986). root rot caused by phytophthora drechsleri has been observed in fields with excessive moisture (habibi,1975). pythium aphanidermatum has been recognized as one of the causal agents of sugar beet, dampin...

abstract a total of 270 bacillus strains were isolated from bulk soil and rhizospheric of cucumber in the tonekabon fields (mazandaran province). antifungal activity of bacillus strains was evaluated against pythium aphanidermatum and p. ultimum using dual culture method. 13 strains with more than 10 mm inhibition zone were selected for further study. morphological, physiological, biochemical a...

Corn yield reduction following a cereal rye cover crop has been attributed to, among other factors, allelochemicals released from decomposing residue. The allelopathic effect of 6-methoxy-2-benzoxazolinone (MBOA) was evaluated on corn seedling growth, mycelial growth seven pathogenic species Pythium, and root rot seedlings caused by Pythium spp. at 13, 16, 22 to 23°C (room temperature) using pl...

A low glucosinolate content (21.8 mmol g) Brassica napus seed meal (RSM) applied to orchard soils altered communities of both pathogenic and saprophytic soil micro-organisms. RSM amendment reduced infection by native and introduced isolates of Rhizoctonia spp. and recovery of Pratylenchus spp. from apple roots. Root infection by Rhizoctonia solani AG-5 was also suppressed in split-root assays w...

Five strains of Trichoderma with known biocontrol activities were assessed for their effect upon pea growth and their antagonistic activity against large Pythium ultimum inocula. The effect of Trichoderma inocula upon the indigenous soil microflora and soil enzyme activities in the presence and absence of Pythium is assessed. In the absence of Pythium, Trichoderma strain N47 significantly incre...