ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Blackwell Publishing Ltd  (24)
  • 1
    Electronic Resource
    Electronic Resource
    DAMAGE BY ROSY RUSTIC MOTH LARVAE IN SCOTLAND, 1956 (1957)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 6 (1957), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1957.tb00801.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effects of temperature on the development of light leaf spot (Pyrenopeziza brassicae) on oilseed rape (Brassica napus) (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 44 (1995), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effects of temperature on the development of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape were investigated in controlled-environment experiments. The proportion of conidia which germinated on leaves, the growth rate of germ tubes, the severity of light leaf spot and the production of conidia increased with increasing temperature from 5 to 15 C. The time to 50% germination of conidia and the incubation and latent periods of light leaf spot lesions decreased when temperature increased from 5 to 15°C. At 20°C, however, light leaf spot severity and production of conidia were less and the incubation and latent periods were longer than at 15 C. There were differences between P brassicae isolates and oilseed rape cultivars in the severity of light leaf spot, the production of conidia and the length of the incubation period but not in the length of the latent period. The responses to temperature for lesion severity and incubation and latent periods appeared to be approximately linear over the temperature range 5-15°C and could be quantified using linear regression analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1995.tb02715.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A rapid test to evaluate in vitro sensitivity of Septoria tritici to flutriafol, using a microtitre plate reader (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 43 (1994), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The sensitivity of Septoria tritici to the sterol biosynthesis inhibiting fungicide flutriafol was assessed using a quick and objective technique based on light absorbance to measure fungal growth. Microtitre plates were inoculated with suspensions of pycnidiospores taken directly from single pycnidia on leaves, after which glucose peptone broth containing different fungicide concentrations was added. After 10 days’ incubation in the dark at 17°C, growth was measured using a spectrophotometer at 405 nm. A dose-response curve fitted to the absorbance data was used to estimate the fungicide concentration reducing absorbance by one half (EC50). The method was precise, quick, reproducible and objective, with substantial advantages over conventional techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1994.tb01612.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effects of temperature, leaf wetness and cultivar on the latent period of Mycosphaerella graminicola on winter wheat (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 39 (1990), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: After inoculation of winter wheat cv. Longbow at a single time, lesions of M. graminicola were produced over a long interval starting 15–35 days after inoculation, dependent on temperature. There was no evidence that a single infection gave rise to more than one lesion. After the initial infection period at 100% relative humidity (r.h.), keeping leaves wet for c. 10 h per day did not shorten latent period on seedlings. Experiments in controlled-environment chambers demonstrated a minimum latent period at approximately 17°C Variation in the latent period of individual lesions was also minimum at this temperature. The latent period varied among the cultivars tested, cv. Longbow having the shortest, cv. Avalon having almost the longest. Field observations broadly confirmed the results of experiments in constant-environment chambers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1990.tb02501.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Factors determining the severity of epidemics of Mycosphaerella graminicola (Septoria tritici) on winter wheat in the UK (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 42 (1993), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Epidemics of disease caused by Septoria tritici were studied in detail in 11 crops of winter wheat cv. Longbow over 4 years. Serious damage to the uppermost two leaf layers was caused by splash-borne infection from lower in the crop early in the life of the leaves, followed by one or rarely two cycles of multiplication within a leaf layer. Infection conditions rarely limited damage, even in a dry year; the timing and, to a lesser extent, amount of initial inoculum movement to an upper leaf layer was of greater importance. Timing of initial infection was determined by when rain splash occurred in relation to emergence of a leaf layer. Occurrence of infections soon after a leaf layer started to emerge allowed more time for multiplication of disease within that layer. These infections tended to be more severe because the leaves were closer to inoculum sources within the crop. Slight differences in phenology between locations explain why initially random disease distributions sometimes become aggregated. Early-sown crops are at greater risk because they mature more slowly, allowing more disease multiplication and better transfer between leaf layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1993.tb02674.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Airborne inoculum as a major source of Septoria tritici (Mycosphaerella graminicola) infections in winter wheat crops in the UK (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The pattern and extent of primary infection by Septoria tritici were compared over a period of 3 years in winter wheat grown at sites with differing histories and from seed stocks obtained in different countries, in the open, under airtight cover and in sterilized soil. Only the airtight cover altered the number of lesions found, substantially reducing it. Lesions were evenly distributed. Lesions were found throughout the autumn and occasionally in the winter and spring on wheat seedlings exposed in trays to the open air for periods of 1 week, then given good conditions for infection to occur. This was true even at a site 0.4 km distant from wheat residues. The results show that the main source of primary infection of winter wheat in these experiments was evenly dispersed and airborne. It probably consisted mainly of ascospores of Mycosphaerella graminicola.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb01425.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A model of the evolution of polygenically controlled fungicide resistance (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A simple model of the evolution of polygenically controlled fungicide resistance is presented. The basic model contains four parameters, all of which are experimentally measurable. The first, β, describes how much a given change in fungicide sensitivity alters the fitness of a clone of the organism in the presence of fungicide. The second, γ, describes the strength of stabilizing selection, which tends to restore sensitivity to an optimal value. The third, σ2, specifies the variance in fungicide sensitivity existing among genotypes in the population. The fourth parameter is the heritability, h2. of fungicide sensitivity; it applies only to pathogens reproducing sexually. The model suggests that changes in sensitivity of populations to fungicide will only be weakly dependent on the concentration applied, but will be mainly controlled by the slope of the graph for fungicide sensitivity against fitness in the presence of fungicide. Unless stabilizing selection is very strong, it will only slightly modify the rate at which sensitivity changes. Loss of resistance in the absence of the fungicide will be, at most, half as fast as its initial gain. If the heritability, h2, is close to 1, annual sexual reproduction will scarcely affect the conclusions drawn above; if h2, is small, long-term changes will be substantially slowed down and a cycle in population fungicide sensitivity may occur within each year. In suitable fungi, limits could be placed on the strength of stabilizing selection by looking for changes in variance in fungicide sensitivity between clones before and after sexual reproduction. Data to test the model are sparse, but do not contradict it.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb01426.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Seasonally induced chaotic dynamics and their implications in models of plant disease (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 43 (1994), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Two models of plant disease in crops regulated by a virus disease or by a hyperparasite are introduced. If the host crop is annually harvested or dies back, the pathogen population at the end of each year may fluctuate indefinitely and irregularly in a way which depends very precisely and for ever on the initial populations. This means that even in an environment which is identical every year, the pathogen populations in each year vary enormously and erratically. However, the combinations of pathogen and virus incidence or hyperparasite infection that can occur exhibit very well defined patterns, even if parameters in the model exhibit substantial random annual variation. It is important that pathologists should be aware that population fluctuations may not be caused by environmental fluctuations and may be, in principle, unpredictable by a deterministic model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1994.tb01623.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Interacting effects of interrupted humid periods and light on infection of wheat leaves by Mycosphaerella graminicola (Septoria tritici) (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 40 (1991), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Septoria tritici conidia require a long period at 100%, humidity to infect wheat plants successfully. When periods of 100% relative humidity were interrupted by up to 48 h at 75% relative humidity, infection by S. tritici on winter wheat cvs Longbow and Avalon was only slightly reduced. Breaks at 50% relative humidity had larger effects, but still allowed infection to occur. Infection was reduced more by a break in humidity which began in the light, but previous and subsequent light regimes strongly influenced the final outcome in all cases. When a wet period was interrupted twice, the two dry breaks interacted strongly under some circumstances; in these cases the probability of infection was much greater than expected from multiplying the effects of the single breaks. Under other conditions two breaks had more nearly multiplicative effects, or interacted to reduce the probability of infection below that expected from the individual breaks. There was evidence that light reduced the probability of successful infection earls in the infection process, but stimulated it later. The data were consistent with infection occurring faster on cv. Longbow, but otherwise being affected in qualitatively similar ways on both cultivars. The complexity of the effects and their interactions suggests that it will not be possible to find a simple set of infection conditions to apply in the field. The data rule out a number of simple mathematical models of the infection process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1991.tb02424.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    OVERWINTERING OF MYZUS PERISCAE (SULZER) IN NORTH-EAST SCOTLAND (1955)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 4 (1955), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1955.tb00064.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...