Native Plant Establishment Success Influenced by Spotted Knapweed (Centaurea stoebe) Control Method

The case against (-)-catechin involvement in allelopathy of Centaurea stoebe (spotted knapweed).

Proving allelopathic chemical interference is a daunting endeavor, in that production and movement of a phytotoxin from a donor plant to a receiving plant must be demonstrated in the substrate in which the plants grow, which is usually a complex soil matrix. The soil levels or soil flux levels of the compound generated by the donor must be proven to be sufficient to adversely affect the receivi...

Influence of plant phenostage and ploidy level on oviposition and feeding of two specialist herbivores of spotted knapweed, Centaurea stoebe

" Agapeta zoegana oviposited significantly more on rosette and one-stem plants. " 2 plants had significantly greater A. zoegana larval density than 4 plants. " Significant correlation between the number of larvae infesting plant roots and Centaurea stoebe root diameter. " Cyphocleonus achates fed more frequently on multiple-stem 4 plants. " Arion lusitanicus had a strong feeding preference for ...

Effects of Picloram Application on Community Dominants Vary With Initial Levels of Spotted Knapweed (Centaurea stoebe) Invasion

Broadleaf herbicides are commonly used to suppress exotic weeds with the intent of releasing native species from negative impacts of invasion. However, weed control measures can also have unintended consequences that should be considered along with intended effects. We conducted a controlled field experiment within bunchgrass communities of western Montana to examine if broadcast application of...

Phenology and dispersal of Larinus minutus Gyllenhal and Larinus obtusus Gyllenhal (Coleoptera: Curculionidae), two biological control agents of Centaurea stoebe ssp. micranthos (spotted knapweed) in Michigan

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Mid-Spring Burning Reduces Spotted Knapweed and Increases Native Grasses during a Michigan Experimental Grassland Establishment