2 edition of effects of inoculum density and environmental factors on wilt and root rot of chickpea (Cicer arietinum L.) found in the catalog.
effects of inoculum density and environmental factors on wilt and root rot of chickpea (Cicer arietinum L.)
Muhammad Aslam Bhatti
Written in English
|Statement||by Muhammad Aslam Bhatti.|
|The Physical Object|
|Pagination||xi, 132 leaves, bound :|
|Number of Pages||132|
The effect of inoculum density on the antibacterial activity of cephalosporins was also tested by disk diffusion. The diameters of the inhibition zones obtained with 10 5 and 10 7 CFU/mL were similar, independent of the antibiotic and the type of β ‐lactamase (results not shown). Legumes are among the most important crops worldwide for human and animal consumption. However, yield inconsistency due to susceptibility to pests and diseases strongly affects its production. Among diseases affecting legumes, Fusarium wilt caused by the soil-borne pathogen Fusarium oxysporum Schltdl. (Fo) is one of the major factors limiting production worldwide. This disease can cause total. The intensity of root infection, as a measure of infectivity, was determined by evaluating the quantity of zoosporangia present in epidermal cells and root hairs of the whole, stained root system. A correlation was obtained between the intensity of root infection and the cystosorus inoculum density . The inoculum concentration at the upper asymptote was then regressed on temperature. For the effect of leaf wetness duration, leaf age and temperature on infection and disease development, disease severity (L) were square root transformed (√L) to reduce heterogeneity in the variance. Because there were no significant differences between.
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A large-seeded kabuli chickpea (cv. Burpee ) and a small-seeded desi chickpea (cv. JG) were grown at different temp. (10, 15, 20, 25 and 30°C) with a range of inoculum densities of 4 root pathogens. Root rot or wilt increased with inoculum levels of Fusarium solani pisi, F. oxysporum ciceris, Pythium ultimum and Thielaviopsis by: The incremental root length of all plants decreased and root discoloration increased as inoculum concentration of the pathogen increased.
Changes were more intensive among low levels of zoospore concentrations and no significant differences in disease severity were found for inoculum densities higher than zoospores mlCited by: The effect of a composite endo mycorrhizal inoculum is tested on the occurre nce of Fusarium wilt, caused by Fusarium solani, in chickpea plants.
Eight weeks after inoculation, the aerial part. Rhizoctonia solani causes seedling blight and root rot in lentil, which reduces plant populations and the vigour and yield of surviving plants. Factors in the seedling environment, such as inoculum density, temperature, seeding depth, seeding date, and fungicidal seed treatment were studied to determine the degree to which they affect the impact of R.
solani on lentil by: 6. When a low root density and a high inoculum level were combined, the amount of roots which became infected was greater than expected. These conditions favoured a longer exponential phase in the development of by: The effect of inoculum density, management practices, and environmental factors on the development of Verticillium dahliae Kleb.
on cotton. View/ Open. GRANT-THESISpdf (Mb) Date Author. Grant, James. Metadata Show full item record. Different biotic and abiotic factors can affect the survival and activity of the applied bacteria and consequently plant growth and phytoremediation efficiency.
The effect of inoculum density on the abundance and expression of alkane-degrading genes in the rhizosphere of plant vegetated in hydrocarbon-contaminated soil has been rarely observed.
Among the biotic factors, the inoculum den- sity can aï¬€ect bacterial colonization and activity in the rhizosphere of a plant. However, the eï¬€ect of inoculum density on the persistence and metabolic activity of the inoculated bacteria during the phytoremediation of organic pollutant-contaminated soil has been rarely studied.
Isolation and identification of tomato wilt and root rot pathogens: Effect of environmental factors on the growth of pathogenic fungi Effect of pH: In general, pH 8 (initial level; just when prepared and before autoclaving) promoted the best growth of all fungi tested except for F.
oxysporum f. are the two most important environmental factors and temperature on root rot and wilt of chickpea. Plant out at 25°C to determine the effects of inoculum density of Fusarium oxysporum f.
Effect of inoculum density on Fusarium corm rot disease of Gladiolus. and 2, 4 and 8 g chickpea carried fungal inoculum per g of soil. Disease incidence of % was recorded in 4%. Crop rotation with non-host crops, especially monocots, has been shown to reduce the inoculum density of T.
basicola in soil and the incidence of black root rot (Holtz and Weinhold, ). Rotation with other host plants may contribute to the cumulative increase of inocula from year to year, such as the use of soybean in cotton farming systems.
The effects of fungicide seed treatments on root rot caused by Fusarium avenaceum and Rhizoctonia solani, and the effect of inoculum density on seedling emergence, nodulation, root rot severity.
Effect of Inoculum Density and Soil Tillage on the Development and Severity of Rhizoctonia Root Rot K. Schroeder and T. Paulitz USDA-ARS Root Disease and Biological Control Unit, Washington State University, Pullman Accepted for publication 26 October ABSTRACT Schroeder, K.
L., and Paulitz, T. Artificial inoculation experiments were carried out at 25°C to determine the effects of inoculum density of Fusarium oxysporum ciceris races 0 (Foc-0) and 5 (Foc-5) and susceptibility of chickpea cultivars P and PV on development of Fusarium wilt.
Foc-5 proved much more virulent than Foc Increasing the inoculum density of F. oxysporum ciceris caused an exponential. effect of inoculum density on disease se- and wilt of chickpea.
Plant Dis. 20, 25, and 30 C) with a range of inoculum densities of four root pathogens. Root rot or wilt increased. Fusarium oxysporum i causes severe wilting in carnation (Dianthus caryophyllus L.) worldwide.
The pathogen is present in the soil profile in which carnation roots are distributed and may infect the plants at any time during the growing season. To minimize the losses induced by Fusarium wilt, growers use carnation cuttings free ofFusarium spp.
and fumigate the soil with methyl. Abstract. In root disease epidemics, inoculum is but one part of the disease triangle with host and environment.
Although inoculum is a critical factor in the development of root disease epidemics, the role of a favorable environment and presence of a host also contribute to root disease epidemics. The effects of inoculum density and environmental factors on wilt and root rot of chickpea (Cicer arietinum L.).
Ph.D. Dissertation, Department of Plant Pathology, Washington State University, Pullman, Washington, pp. Google Scholar Chen, W., Coyne, C.
J., Peever, T. L., & Muehlbauer, F. redolens was found associated with foot-rot symptoms on pea and bean, root rot on soybean, and vascular wilt on lentil, root rot, crown rot and spear rot in asparagus and wilting in chickpea. Recently F. redolens was also reported in Tunisian fields for the first time causing yellowing symptom in chickpea [.
Effect of inoculum density and soil tillage on the development and severity of rhizoctonia root rot. Schroeder KL(1), Paulitz TC.
Author information: (1)USDA-ARS Root Disease and Biological Control Unit, Washington State University, PullmanUSA. The effects of inoculum density (0, × 10 7, × 10 8, and × 10 8 cfu∙mL −1), temperature (10, 20, and 30 °C), and plant genotype (cultivars Celebrity, Blazer, Scotia, and Mountain Delight) on bacterial colonization and plant growth promotion were investigated in a gnotobiotic in vitro dual culture of tomato (Lycopersicon esculentum L.) plantlets and a Pseudomonas sp.
High occurrence of root rots is attributed to continuous and inappropriate cropping systems, low soil fertility levels, low moisture in soil, use of farm saved seeds and use of root rot susceptible bean (Phaseolus vulgaris L.) varieties. This study evaluated the effect of soil fertility and intercropping on the incidence and severity of root rot diseases of common bean.
Effects of the hosts, the pathogen, the environment and their interactions on Fusarium wilt in carnation. Phytoparasit Bhatti MA, Kraft JM.
Effect of inoculum density and temperature on root rot and wilt of chickpea. Plant dise Chand H, Khirbat SK. Chickpea wilt and its management – A review.
Bhatti MA, Kraft JM. Effect of inoculum. Agrios GN. Environmental effects on the. density and temperature on root rot and wilt of. development of the infectious disease. (in) Plant. Rain intensity and duration are environmental factors that growers cannot manipulate, PAGE 27 27 h owever when using plastic mulch as a ground cover, growers can rely on cultural practices such as higher plant density to reduce disease spread.
Inoculum dispersal can be reduced with increased plant density (Madden and Boudreau, ). Wilt and root rot are the common and frequently occurring diseases of chickpea and causes considerable yield loss (Haware et al., ; Kaur and Mukhopadhyay, ).
Fusarium oxysporum f. ciceri (Padwick) Synd. and Hans. is considered to be the primary cause of wilt disease in chickpea (Chattopadhyay and Sen Gupta, ).
root rot is also a threat to apple, walnut and kiwi production . Laminated root rot is the most damaging disease of young-growth Douglas-fir and other conifers in the Pacific Northwest region of the U.S.
This disease is caused by the fungus Phellinus weirii, which survives for 50 years or more in roots after trees are harvested . Different inoculation methods have been used to for the infectivity of wilt in chickpea but in lentil very limited work has been conducted [12, 98, 99].
The inoculum density of about 10 6 conidia ml −1 is generally been used to establish the pathogen. Wild species are an invaluable source for disease resistance. The relationship between inoculum density (number of microsclerotia per gram of air-dried soil) of Verticillium dahliae at the time of planting and the severity and incidence of root discoloration of horseradish at harvest was investigated in a 2-year study conducted in the greenhouse, microplots, and commercial production fields.
fungal pathogens, the wilt pathogens have a more specialized host range (classified as forma speciales) and are adapted to grow in the vascular system of their host. The Fusarium vascular wilt is a disease of many agricultural and horticultural crops, including banana, tomato, cotton, chickpea.
Effect of microelements in controlling root rot and wilt diseases of roselle. The in vitro study showed that copper and manganese were the most effective elements in inhibiting the linear growth of F. oxysporum, F. solani, and M. ore, these microelements were used in field trials at concentrations of and ppm.
J.H. Litchfield, in Encyclopedia of Microbiology (Third Edition), Inoculum Development. Inoculum development is an important step in lactic acid production. Both the nutrient content of the inoculum medium and the size of the inoculum (number of colony-forming units (cfu) per milliliter and cell concentration (dry weight) or spores per milliliter) are important determinants of cell.
Using the three above-mentioned methods to measure the inoculum density or inoculum potential in the soil, we obtained very reliable results with the flax isolation technique where r, the correlation coefficient, was comparatively higher than (Table I, Fig.l, 3 and 7).
Effect of soil temperature and inoculum density on pre-emergence damping-off of canola caused by Rhizoctonia solani. Canadian Journal of Plant Pathology: Vol. 10, No. 2, pp. EFFECTS OF ENVIRONMENTAL FACTORS ON DECAY RATES OF SELECTED WHITE- AND BROWN-ROT FUNGI Wood species had no effect on MOR losses, but wood durability did influence fungal effects on MOR.
The white-rot fungus caused comparable MOE losses to the brown-rot fungi but had a much decreased effect on MOR. was used as the fungal inoculum for the. Fusarium root rot in common bean (Abawi and Pastor-Corrales ; Berni et al.
; Paula Júnior et al. Toledo-Souza et al. () found that soil-borne Fusarium spp. inoculum was higher in no-till than in conventionally tilled fields, except when beans were planted on residues of Brachiaria brizantha.
Hall and Phillips ()showedevi. In conclusion, the results show a significant effect of the inoculum density on cell expansion, differentiation and production of hiPSCs, emphasizing the importance of the inoculum density for downstream applications of hiPSCs. Furthermore, the bioreactor technology was successfully applied for controlled and scalable production of hiPSCs for.
Root rot severity was significantly (P inoculum density from x 10(2) CFU/g of soil to x 10(3) CFU/g of soil. Disease severity was higher at 20 degrees C compared with 15 and 25 degrees C and at MPa soil moisture compared with and MPa. Since the relationship between increasing incidence of charcoal rot on melon and irrigation type is unknown, studies were initiated to determine the effects of edaphic factors on inoculum density.
Soil samples were collected once from fields irrigated by subsurface drip, with and without plastic mulch, and by furrow at 10, 20 and 30 cm depths. adjustment of the inoculum density to a McFarland turbidity standard.
The original Bauer-Kirby method should have an inoculum derived fromabroth culture in log phase (8). It has been demonstrated that a suspension of growthfromaprimaryculture plate less than24 h old also provides an acceptable inoculum for the Bauer-Kirby test (7, 9, 10). () 6(5): Table.2 Effect of cropping system on per cent disease incidence of root rot/wilt of fenugreek Cropping system Name of the villages PDI Sole cropping Atharga Bailahongal Bankapura Effects of inoculum to substrate ratio, substrate mix ratio and inoculum source on batch co-digestion of grass and pig manure.
Dechrugsa S(1), Kantachote D(2), Chaiprapat S(3). Author information: (1)International Postgraduate Program in Environmental Management, Graduate School, Chulalongkorn University, BangkokThailand; Center of.