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Julie Hopper

Julie Hopper

Graduate Student

(510) 643 5903

My research interests include biological control, global change biology, insect ecology, marine biology, multitrophic interactions and parasitology. I aspire to use biological control in combination with ecological restoration in aquatic systems to mitigate negative impacts by invasive species, and to prevent disease transmission in aquaculture. I am interested in the mechanisms responsible for the tremendous establishment and spread of some invasive species, and the lack of success for other species. Similarly, I am also interested in the multitrophic interactions and abiotic factors that determine the success of biological control programs

Success rates of biological control of insect pests depend on abiotic factors and the multitrophic interactions among plants, herbivores, and their natural enemies. Contrary to the trend for most invasive species, the invasive Light Brown Apple Moth, E. postvittana has been in decline since its initial spread in California in 2007, thus eliminating the need for classical biological control. My dissertation focuses on the multitrophic interactions and resident natural enemies involved in the natural decline of the Light Brown Apple Moth in California and provides a unique opportunity to use this knowledge to inform the approaches necessary to control other invasive or nuisance species.


1) Estimate the degree of variation in parasitism by parasitoid wasps of egg and larval stages of the Light Brown Apple Moth on different host plant species in the field and the laboratory.

2) Characterize the novel microsporidian pathogen, Nosema fumiferanae-like isolate, and its pathology in the Light Brown Apple Moth

3) Determine the occurrence and load of N. fumiferanae in field populations of the Light Brown Apple Moth using qPCR.

4) Investigate the role of low humidity, and different host plants and nutrition on the pathology of N. fumiferanae in Light Brown Apple Moth larvae.

Me, in the field with my 9 different plants, studying tritrophic interactions

Nosema fumiferanae-like isolate (parasitic microsporidian species) in an infected E. postvittana larva



Hopper J.V., Kuris A.M., White C., Lorda J., Koch S.E., Hechinger R.F. 2014. Reduced parasite diversity and abundance in a marine whelk in its expanded geographic range. J. Biogeography 41, 1674-1684.

Hopper J.V., Nelson E.H., Daane K.M., Mills N.J. (2011). Growth, development and consumption by four syrphid species associated with the lettuce aphid, Nasonovia ribisnigri, in California. Biological Control 58 (3) 271-276

Hopper J.V., Poulin R., Thieltges D.W. (2008). Buffering role of the intertidal anemone Anthopleura aureoradiata in cercarial transmission from snails to crabs. Journal of Experimental Marine Biology and Ecology 367, 153-156

For my full CV click here (pdf)


Department of Environmental Science, Policy and Management
University of California, Berkeley
137 Mulford Hall
Berkeley, CA 94720-3114

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