Biology of host range testing for biocontrol of weeds

The determination of host range is an important component in developing a plant pathogen for use as a bioherbicide. The safety of non-target economic and wild plants must be assured before experimental release and commercial use. In contrast to other methods of weed control, the genetic variability...

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Bibliographic Details
Published in:Weed technology 1990-07, Vol.4 (3), p.465-470
Main Authors: Weidemann, G.J. (Univ. Arkansas, Fayetteville, AR), Tebeest, D.O
Format: Article
Language:English
Subjects:
AGENT PATHOGENE
Agronomy. Soil science and plant productions
AUXILIAIRE DE LUTTE BIOLOGIQUE
Biocontrol: An Applied Ecological Approach to Weed Management
Biological and medical sciences
BIOLOGICAL CONTROL
Biological control and other methods
BIOLOGICAL CONTROL ORGANISMS
CHAMPIGNON
CONTROL BIOLOGICO
DESHERBAGE
Disease resistance
Ecological genetics
ENSAYO
ESCARDA
Fundamental and applied biological sciences. Psychology
FUNGI
GENETIC VARIATION
HERBICIDAS
HERBICIDE
HERBICIDES
HONGOS
HOST PARASITE RELATIONS
Host range
HOST SPECIFICITY
HOSTS
HOTE
HUESPEDES
LUTTE BIOLOGIQUE
MALEZAS
MAUVAISE HERBE
Medical genetics
MICROBIAL PESTICIDES
MYCOHERBICIDES
ORGANISMOS PARA CONTROL BIOLOGICO
ORGANISMOS PATOGENOS
Parasite hosts
Parasitic plants. Weeds
PATHOGENS
PESTICIDE MICROBIEN
phytopathogenic fungi
Phytopathology. Animal pests. Plant and forest protection
PLAGUICIDAS MICROBIANOS
Plant diseases
PLANT PATHOGENIC FUNGI
Plants
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
TESTAGE
TESTING
VARIACION GENETICA
VARIATION GENETIQUE
WEED CONTROL
WEEDS
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Description
Summary:The determination of host range is an important component in developing a plant pathogen for use as a bioherbicide. The safety of non-target economic and wild plants must be assured before experimental release and commercial use. In contrast to other methods of weed control, the genetic variability and genetic stability of both the weed and the biological control agent must be considered. Schemes to determine host range generally assume a close phylogenetic relationship between the weed host and its co-evolved pathogens. Therefore, testing generally is based on inoculation of genetically related plant species and progresses to more distantly related species until the host range is circumscribed. Several potential weaknesses in these schemes will be illustrated with examples using specific biological control agents. Future tests must place greater emphasis on testing taxa representing the full range of genetic diversity within the biogeographic area of intended use.
ISSN:0890-037X
1550-2740
DOI:10.1017/S0890037X0002577X