Website of the Phytophagy Lab at Cornell University, led by Anurag Agrawal, James A. Perkins Professor of Environmental Studies
We are in the Dept of Ecology & Evolutionary Biology and Dept of Entomology at Cornell University. Our lab studies the ecology and evolution of plant-insect interactions, including aspects of herbivory, community ecology, defense theory, phenotypic plasticity, Chemical Ecology, and coevolution. Research projects include work on local biodiversity, milkweeds, and Monarch butterflies. See also the Cornell Chemical Ecology Group. We are especially keen to work on combining comparative phylogenetic approaches with experimental evolutionary ecology as a means to link natural history, evolutionary convergence, and strong inference towards understanding function and ecological outcomes.
Hello from Oaxaca! A few updates on monarchs and milkweed, February 2018…
Click here for my photo blog on Monarchs and Milkweed in Mexico Part II
Listen to this new podcast and interview about monarchs and milkweed on Brad Grim’s Grow Milkweed forum.
See this great book review in American Entomologist
And finally, a bit of humor, I think. Illinois… Read more 
I am getting settled in Oaxaca, on sabbatical leave from Cornell studying milkweeds and monarchs in Mexico. Here is my initial report on plants and insects from the first couple of weeks. The people, culture, food, and biodiversity have all met my expectations so far. What a great country! This is providing inspiration for the next chapter of what I… Read more 
Holiday blog on the Princeton University Press site, click here!
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A brief update on Monarchs and Milkweed from Montana, Dec. 2017.
Monarchs and Milkweed has received the National Outdoor Book Award in the Nature and Environment Category.
Here is a fabulous book review of M&M written for the scientific journal Ecology written by Kelly Nail.
And finally, M&M made the top 10 list for the 2018 AAAS/Subaru Prize for… Read more 
I recently came across a new study by a group of friends and colleagues that blew me away. Of all the environmental pollutants and nasty things we use to kill pests, who knew that fungicides (chemicals used to kill fungus) would become a problem for bumblebee pollinators. This study:
McArt, S. H., C. M. Urbanowicz, S. McCoshum, R. E.… Read more 
I just received word from the Dean’s office in CALS that I have been appointed the James A. Perkins Professor of Environmental Studies at Cornell! This is a huge honor, and I am thrilled and excited.
Embarrassingly enough, I didn’t know who he was. J.A. Perkins, who passed away 20 years ago, was the 7th President of Cornell. Here is… Read more 
Science education should start early! And as part of our collaborative NSF grant on milkweed genetics and ecology (with Georg Jander from BTI and Steve Broyles from Suny Cortland), we are implementing outreach projects in the K-12 Ithaca schools. Led by research support specialist, Amy Hastings, and inspired by a set of experiments by former postdoc Patty Jones, second graders… Read more 
Things are going well on the sabbatical in Missoula, MT! On November 9th I will be speaking at a “friend-raiser” associated with the Montana Natural History Center and the Missoula Insectarium. And in December I will be speaking at Harvard’s Arnold Arboretum. Both talks will give an overview of monarchs and milkweed and an update on their current predicament. I… Read more 
An excellent new study finds that climate, habitat loss (in both Mexico and the USA), disease, & insecticides contribute to decline of monarch butterflies. Although one could quibble with the emphasis placed on discussion of various issues, what I appreciate is the quantitative nature and comprehensiveness of the study, and the attempt to include as many factors as possible. Perhaps… Read more 
Anurag and Jennifer are off for sabbatical for the 2017-18 academic year… but science in the lab continues. As a wrap-up, here are some news and happenings from the summer months…
Congrats to Jacob and Katie for passing their A-Exams with flying colors (see previous post on their cork-popping performances).
Anurag, Jacob, Katie, Lina, and Patty all attended the Ecological… Read more 
On July 24th 2017, I set out with my family from Ithaca, NY, for year-long sabbatical leave from Cornell University. Our destination for the fall semester is Missoula, Montana, but our first major stop was a family visit in Urbana, IL. Given my travel companions, especially the kids Jasper (12) and Anna (8), we decided to take our time driving… Read more 
As part of being the Vice President of the American Society of Naturalists, I had the opportunity to organize a symposium at the annual meeting in 2016 (Austin, TX). The topic was convergence, natural history, and the big questions in biology. The talks were great, and what I think (hope!) will really have an impact on the field is this… Read more 
US agriculture is based on ideas that make me scratch my head. We typically grow plants that are not native to North America, we grow them as annuals, and we usually only care about one product from the crop, like the tomatoes that give us ketchup and pizza.
And we don’t like weeds. Why would we? They take resources… Read more 
It’s peak season for milkweed and the village of insects that make milkweed its home. In my book on Monarchs and Milkweed, I devote an entire chapter to these diverse and fascinating other milkweed insects. Below are photos from two days last week (July 6 and 7th), one set from my front yard and the other from Shawangunk National Grassland… Read more 
I recently had the opportunity to sit down with Paul Feeny, one of the all-time great scientists who studies plant-herbivores interactions. Paul has been at Cornell since 1967, and was one of the founders of the discipline of chemical ecology. Over the years Paul has had many successful students, he taught a range of courses, and contributed to the communal… Read more 
See new op-ed article posted on Scientific American: Monarchs in Peril… Read more 
Our lab always has a cadre of excellent undergraduate researchers. This academic year was especially great as five students engaged in various projects from the study of bumble bee foraging and learning to mechanisms of toxicity in the Malagasy stem-succulent genus Pachypodium. We are proud of and grateful to all of you… and best wishes to our two graduates, Aliya… Read more 
Here is an update on monarch and milkweed happenings… Over the past few weeks I have visited several natural history venues for a modest book tour — it has gone very well, with the added pleasure of meeting some well-known citizen scientists and old friends. It started with a Chats in the Stacks at Cornell which is now online on… Read more 
A long-held tradition in E&EB at Cornell (and probably at most institutions) is that of popping a cork when graduate students meet particular milestones. The bubbly can take many forms, from Champagne to sparkling water. For us, the most familiar events are the “A” and “B” exams, for passing the qualifying exam (to become a PhD candidate, typically at the… Read more 
Thanks to all for another great semester of the plant-interactions group!
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We embarked on our final winter walk of the season on April 28th, immediately after the 7th annual HW Greene Grilled Cheese Challenge in Corson Hall. It has become a tradition for the President of Cornell University to be a judge in the competition, and this year was no different with our new Prez, Martha Pollack, in attendance.
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Coevolution is a special kind of evolution. And monarchs and milkweeds exemplify this special process. In particular, what makes coevolution special is reciprocity. In other words, coevolution is one species that evolves in response to the other, and the other species evolves in response to the first. Thus, it is a back-and-forth that has the potential to spiral out of… Read more 
Folks in the lab are frequently engaged in outreach activities, ranging from visits to elementary schools to high school teacher training. In the past year, we have visited South Seneca and Belle Sherman elementary schools in Ithaca, and the Lincoln Street Elementary School in Waverly, NY. We also participate in Expanding Your Horizons events, Cornell Entomology’s Insectapalooza, Cornell Institute for… Read more 
I recently returned from a spring trip to the Austin, TX area in search of re-migrating monarch butterflies: 8-month old animals weighing less than a dollar bill, that had traveled for thousands of miles, rested in Mexico for 5 months, and crossed the border again. A postdoc in the lab, Patty Jones, joined for the trip, which auspiciously started with… Read more 
The following is a Q&A just posted to the Princeton University Press website and blog.
What makes monarchs and milkweeds so special?
AA: Monarchs and milkweed are remarkable creatures, they’re on a wild ride! From the monarch’s perspective, its only food as a caterpillar is the milkweed plant. This makes them highly specialized, highly evolved, and very picky eaters indeed.… Read more 
Check out the spectacular new hiking trail guide to the Ithaca area! https://ithacatrails.org/map
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Monarchs and Milkweed is now available, although the official release date from Princeton University Press in
April 11. On Saturday April 8th, I will be participating in the San Antonio Book Festival. Early reviews have been positive (thank you!), including a whirlwind summary in the Washington Post, which emphasizes conservation issues and my argument that milkweed limitation is not driving… Read more 
On Friday March 24, we had our third winter walk… after a mostly snow-free and rather warm winter, last week we got well over a foot of snow in Ithaca. Schools (including Cornell) were closed for 2 days, and we all did a bit of skiing. The ground has retained more snow cover from this storm than it had all… Read more 
The women of Cornell’s plant-herbivore group (Jennifer, Natasha, Zoe, Katja, Katie, Lina, and Aino) recently returned from the plant-herbivore interactions gordon research conference. Pictures below by Jennifer Thaler. As usual, Jennifer described the GRC as a love-fest, seeing old friends and meeting new colleagues. Especially fun for those in attendance (I was home looking after the family) were all of… Read more 
By Lina Arcila Hernández and Katie Holmes
In recent conversations mulling over the history of science, we’ve talked about a shift in the social environment that scientists experience. It seems that historically, scientific knowledge has been built by highly creative individuals driven by an acute desire to understand the world around them. And still today, scientists spend a big part… Read more