Evaluation of the Impact of on Seed Production in California.

The impact of the capitulum weevil on seed production was examined at two field sites in central California. The study occurred in 1993-1995 during the early phases of the biological control program on and before the current guild of capitulum insects had become widespread. Results showed that adult feeding on early flower buds resulted in 60-70% of buds failing to develop.

Establishment of the Yellow Starthistle Rust in California: Release, Recovery, and Spread.

The rust fungus Puccinia jaceae var. solstitialis is the first pathogen released for biological control of yellow starthistle (Centaurea solstitialis). From 2004 to 2006, the pathogen was released at 176 sites in 40 counties throughout the state of California.

Evaluation of the toxicity of Adonis aestivalis in calves.

Toxicosis of Adonis aestivalis is well documented in horses, but little is known of its toxicity in cattle. A. aestivalis (summer pheasant's eye) was collected over multiple years, under different growing conditions, and at various stages of maturity, dried, and administered to calves to evaluate the toxicity of A.