Integrated Pest Management

Integrated pest management is the application of two or more management alternatives so they are complimentary in weed suppression, increase the longevity of control procedures, and improve crop production, or conservation of resources. On small common St. Johnswort populations, aggressive herbicidal control should be combined with cultural practices that strengthen the competitiveness of the plant community. In areas with large scale infestations, herbicides should be used to eradicate small satellite populations and to reduce spread along the invasion front of the parent population. Biological control insects can be used to reduce the parent population and reduce invasiveness. On crop and hay land in rotation, tillage followed by herbicide treatment will be more effective than either treatment applied alone. On disturbed sites, pastures, and rangeland where competitive plants have been lost, revegetation following control of common St. Johnswort will improve the longevity of the control application.

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Last Modified: 07/27/2007