| fertility status and distribution of mating type alleles of the rice blast fungus, magnaporthe grisea in northern iran. | this study was carried out using 155 monoconidial isolates collected from different areas of two major rice growing provinces in northern iran, including 94 isolates from guilan and 59 isolates from mazandaran. among 94 isolates from guilan, 92 and two isolates recovered from rice and crabgrass (digitaria sp.), respectively. all 61 rested isolates from mazandaran were recovered from rice. all isolates were evaluated for in vitro sexual fertility and mating type status by pairing with mat 1-1 and ... | 2004 | 15756836 |
| diazinon resistance in different selected strains of chilo suppressalis (lepidoptera: crambidae) in northern iran. | asiatic rice borer, chilo suppressalis (walker) (lepidoptera: crambidae), is a cosmopolitan and destructive pest in rice fields of the world. this pest was reported in 1973 in iran, and it has since spread widely in rice, oryza sativa l., fields throughout the country. in this study, we tried to evaluate comparative toxicity of diazinon in five colonies of c. suppressalis, collected from babol (ba), amol (am) of mazandaran province and rasht (ra), sheikhmahale (sh), and gourabzarmikh (go) of gui ... | 2009 | 19610437 |
| the influence of continuous rice cultivation and different waterlogging periods on morphology, clay mineralogy, eh, ph and k in paddy soils. | the effect of different rice cultivation periods on the properties of selected soils in alluvial plain were studied in mazandaran province (north of iran) in 2004. soils were sampled form 0, 6, 16, 26 and over 40 years rice cultivation fields. in each treatment three soil profiles and six nearby auger holes were studied. the present study results indicated that continuous rice cultivation have changed soil moisture regime from xeric to aquic, soil color from brown to grayish, surface horizons fr ... | 2007 | 19090186 |
| investigation the growth, yield and yield components of rice varieties in rotation with garlic, faba bean, lettuce, pea and fallow in north of iran. | in order to investigating the effects of second crop cultivation on growth, yield and yield components of rice, a field experiment was conducted at the rice research institute of iran-deputy of mazandaran (amol) during 2004 and 2005. tarom as a traditional variety and fajr as a improved variety were used in this research. faba, pea, lettuce and garlic were used as a second crop in rotation with rice. second crop cultivation, variety and interaction between them had a significant effect on tiller ... | 2007 | 19070083 |
| study of water stress effects in different growth stages on yield and yield components of different rice (oryza sativa l.) cultivars. | a field experiment was conducted during 2001-2003 to evaluate the effect of water stress on the yield and yield components of four rice cultivars commonly grown in mazandaran province, iran. in northern iran irrigated lowland rice usually experiences water deficit during the growing season include of land preparation time, planting, tillering stage, flowering and grain filing period. recently drought affected 20 of 28 provinces in iran; with the southeastern, central and eastern parts of the cou ... | 2008 | 18817260 |
| the assessment of the rice cultivars/lines resistance to blast disease in mazandaran province, iran. | blast, caused by magnaporthe grisea, is one of the most important diseases in rice production regions of the world including iran. to determine progress of rice blast disease on the selective cultivars and lines also to assay some components of partial resistance, a set of iranian rice cultivars (local and breeding) along with near-isogenic lines (nils) and breeding lines from international rice research institute (irri) were tested with some field races of the fungus in blast nursery and five o ... | 2004 | 15756856 |