Imperial College London
Michael J Jeger

Michael J Jeger

Faculty of Natural Sciences, Department of Life Sciences (Silwood Park)

Emeritus Professor of Horticulture
 
 
 
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Contact

 

+44 (0)1398 332 941m.jeger Website

 
 
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Location

 

Home working 13 Brook Street, Bampton, Devon EX16 9LUSilwood ParkSilwood Park

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Summary

 

Publications

Publication Type
Year
to

271 results found

Hoffland E, Jeger MJ, van Beusichem ML, 2000, Effect of nitrogen supply rate on disease resistance in tomato depends on the pathogen, PLANT AND SOIL, Vol: 218, Pages: 239-247, ISSN: 0032-079X

Journal article

Jeger MJ, 1999, Improved understanding of dispersal in crop pest and disease management: current status and future directions, AGRICULTURAL AND FOREST METEOROLOGY, Vol: 97, Pages: 331-349, ISSN: 0168-1923

Journal article

Bock CH, Jeger MJ, Mughogho LK, Cardwell KF, Mtisi Eet al., 1999, Effect of dew point temperature and conidium age on germination, germ tube growth and infection of maize and sorghum by <i>Peronosclerospora sorghi</i>, MYCOLOGICAL RESEARCH, Vol: 103, Pages: 859-864, ISSN: 0953-7562

Journal article

Bock CH, Jeger MJ, 1999, The effect of sowing date on the incidence of sorghum downy mildew on sorghum in Zimbabwe, Tropical Science, Vol: 39, Pages: 194-203, ISSN: 0041-3291

The effect of date of sowing on the incidence of sorghum downy mildew (SDM), caused by Peronosclerospora sorghi, on sorghum was investigated by sowing three crops at 2-week intervals in two years. Later sowings did not significantly increase the incidence of systemic infection in either year. In 1992/93 the mean incidence of SDM infection was 2.9, 4.6 and 5.8% plants systemically infected for the first, second and third sowing dates respectively. In 1993/94 it was 14.7, 2.5 and 12.2%. Later sowing in 1992/93 reduced the yield, but drought masked any effect in 1993/94. Sowing in Zimbabwe, and much of semiarid Africa, is dependent on the arrival of the first rains, and it must be done expeditiously to utilize the short growing season.

Journal article

Hoffland E, van Beusichem ML, Jeger MJ, 1999, Nitrogen availability and susceptibility of tomato leaves to <i>Botrytis cinerea</i>, PLANT AND SOIL, Vol: 210, Pages: 263-272, ISSN: 0032-079X

Journal article

Jeger MJ, Gilijamse E, Bock CH, Frinking Het al., 1998, The epidemiology, variability and control of the downy mildews of pearl millet and sorghum, with particular reference to Africa, PLANT PATHOLOGY, Vol: 47, Pages: 544-569, ISSN: 0032-0862

Journal article

Bock CH, Jeger MJ, Mughoho LK, Cardwell KF, Adenle V, Mtisi E, Akpa AD, Kaula G, Mukasambina D, Blair-Myers Cet al., 1998, Occurrence and distribution of Peronosclerospora sorghi [Weston and Uppal (Shaw)] in selected countries of West and Southern Africa, CROP PROTECTION, Vol: 17, Pages: 427-439, ISSN: 0261-2194

Journal article

Stein A, Van Groenigen JW, Jeger MJ, Hoosbeek MRet al., 1998, Space-time statistics for environmental and agricultural related phenomena., ENVIRONMENTAL AND ECOLOGICAL STATISTICS, Vol: 5, Pages: 155-172, ISSN: 1352-8505

Journal article

Stolk C, van den Bosch F, Termorshuizen AJ, Jeger MJet al., 1998, Modeling the dynamics of a fungal mycoparasite and its host: An energy-based approach, PHYTOPATHOLOGY, Vol: 88, Pages: 481-489, ISSN: 0031-949X

Journal article

Kenerley CM, White TL, Jeger MJ, Gerik TJet al., 1998, Sclerotial formation and strand growth of <i>Phymatotrichopsis omnivora</i> in minirhizotrons planted with cotton at different soil water potentials, PLANT PATHOLOGY, Vol: 47, Pages: 259-266, ISSN: 0032-0862

Journal article

Bock CH, Jeger MJ, Mughogho LK, Mtisi E, Cardwell KFet al., 1998, Production of conidia by <i>Peronosclerospora sorghi</i> on sorghum crops in Zimbabwe, PLANT PATHOLOGY, Vol: 47, Pages: 243-251, ISSN: 0032-0862

Journal article

Jeger MJ, Van Den Bosch F, Madden LV, Holt Jet al., 1998, A model for analysing plant-virus transmission characteristics and epidemic development, IMA JOURNAL OF MATHEMATICS APPLIED IN MEDICINE AND BIOLOGY, Vol: 15, Pages: 1-18, ISSN: 0265-0746

Journal article

Jeger MJ, 1998, Building models of epidemics to help take decisions, Editors: Bridge, Jeffries, Morse, Scott, Publisher: CABI PUBLISHING-C A B INT, Pages: 135-150, ISBN: 0-85199-217-X

Book chapter

Hoffland E, Jeger MJ, Van Beusichem ML, 1998, Is plant growth rate related to disease resistance?, Editors: Lambers, Poorter, VanVuren, Publisher: BACKHUYS PUBLISHERS, Pages: 409-427, ISBN: 90-73348-96-X

Book chapter

Jeger MJ, 1997, Approaches to integrated crop protection in university education and training, AGRICULTURE ECOSYSTEMS & ENVIRONMENT, Vol: 64, Pages: 173-179, ISSN: 0167-8809

Journal article

Bock CH, Jeger MJ, Fitt BDL, Sherington Jet al., 1997, Effect of wind on the dispersal of oospores of Peronosclerospora sorghi from sorghum, PLANT PATHOLOGY, Vol: 46, Pages: 439-449, ISSN: 0032-0862

Journal article

Holt J, Jeger MJ, Thresh JM, OtimNape GWet al., 1997, An epidemiological model incorporating vector population dynamics applied to African cassava mosaic virus disease, JOURNAL OF APPLIED ECOLOGY, Vol: 34, Pages: 793-806, ISSN: 0021-8901

Journal article

Gilijamse E, Frinking HD, Jeger MJ, 1997, Occurrence and epidemiology of pearl millet downy mildew, Sclerospora graminicola, in southwest Niger, INTERNATIONAL JOURNAL OF PEST MANAGEMENT, Vol: 43, Pages: 279-283, ISSN: 0967-0874

Journal article

Jeger MJ, 1997, Theoretical considerations in the epidemiology and control of vector-borne diseases of perennial crops, such as lethal yellowing-like diseases of coconut, International Workshop on Lethal Yellowing-Like Diseases of Coconut, Publisher: NATURAL RESOURCES INSTITUTE, Pages: 239-246

Conference paper

Otusanya MO, Jeger MJ, 1996, Effect of Aspergillus niger on shoot emergence and vine development in field-sown yams (Dioscorea spp) and rot development under long-term storage conditions, INTERNATIONAL BIODETERIORATION & BIODEGRADATION, Vol: 38, Pages: 89-100, ISSN: 0964-8305

Journal article

Maddison AC, Holt J, Jeger MJ, 1996, Spatial dynamics of a monocyclic disease in a perennial crop, ECOLOGICAL MODELLING, Vol: 88, Pages: 45-52, ISSN: 0304-3800

Journal article

Jeger MJ, Waller JM, Johanson A, Gowen SRet al., 1996, Monitoring in banana pest management, CROP PROTECTION, Vol: 15, Pages: 391-397, ISSN: 0261-2194

Journal article

Jeger MJ, Hide GA, vandenBoogert PHJF, Termorshuizen AJ, VanBaarlen Pet al., 1996, Pathology and control of soil-borne fungal pathogens of potato, 13th Triennial Conference of the EAPR, Publisher: SPRINGER, Pages: 437-469, ISSN: 0014-3065

Conference paper

JEGER MJ, CHAN MS, 1995, Theoretical aspects of epidemics: Uses of analytical models to make strategic management decisions, CAN J PLANT PATHOL, Vol: 17, Pages: 109-114

The uses of modelling in predicting and understanding plant disease epidemics have diversified and changed in emphasis in response to theoretical advances and in appreciation of practical constraints. A case is made in this paper for the relevance of theoretical models to strategic disease management decisions. Mathematical analysis of systems of equations describing different categories of disease (e.g. latent, infectious and post-infectious) allows predictions of the eventual size of an epidemic (e.g. final disease intensity), determination of criteria for an epidemic to occur, and the likely impact of a control practice on the epidemic. These ideas are illustrated with respect to theoretical models of plant virus disease epidemics subjected to management interventions involving: planting with isolation distances; and roguing of diseased plants with replanting of healthy ones. Conclusions are related to data obtained from the literature for four plant virus diseases, cocoa swollen shoot, plum pox, citrus tristeza, and banana bunchy top, although in each case the kinds and availability of epidemiological data may limit the uses of theoretical models.

Journal article

JEGER MJ, CHAN MS, 1995, THEORETICAL ASPECTS OF EPIDEMICS - USES OF ANALYTICAL MODELS TO MAKE STRATEGIC MANAGEMENT DECISIONS, 6th International Congress of Plant Pathology, Publisher: CANADIAN PHYTOPATHOL SOC, Pages: 109-114, ISSN: 0706-0661

Conference paper

DIOURTE M, STARR JL, JEGER MJ, STACK JP, ROSENOW DTet al., 1995, CHARCOAL ROT (MACROPHOMINA-PHASEOLINA) RESISTANCE AND THE EFFECTS OF WATER-STRESS ON DISEASE DEVELOPMENT IN SORGHUM, PLANT PATHOLOGY, Vol: 44, Pages: 196-202, ISSN: 0032-0862

Journal article

JEGER MJ, 1995, The implications of integrated crop protection approaches for education and training, Symposium on Integrated Crop Protection - Towards Sustainability, Publisher: BRITISH CROP PROTECTION COUNCIL, Pages: 457-468

Conference paper

CHAN MS, JEGER MJ, 1994, AN ANALYTICAL MODEL OF PLANT-VIRUS DISEASE DYNAMICS WITH ROGUING AND REPLANTING, JOURNAL OF APPLIED ECOLOGY, Vol: 31, Pages: 413-427, ISSN: 0021-8901

Journal article

JEGER MJ, VANDENBOSCH F, 1994, THRESHOLD CRITERIA FOR MODEL-PLANT DISEASE EPIDEMICS .2. PERSISTENCE AND ENDEMICITY, PHYTOPATHOLOGY, Vol: 84, Pages: 28-30, ISSN: 0031-949X

Journal article

JEGER MJ, VANDENBOSCH F, 1994, THRESHOLD CRITERIA FOR MODEL-PLANT DISEASE EPIDEMICS .1. ASYMPTOTIC RESULTS, PHYTOPATHOLOGY, Vol: 84, Pages: 24-27, ISSN: 0031-949X

Journal article

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