Professor of Entomology
Huck Graduate Students
Publication TagsInsecticide Pest Control Crop Insecticides Pests Biological Control Seed Pest Maize Arthropod Soil Nutrition Bees Corn Insects Ecology Herbivory Predator Pollen Predators Cover Crops Insect Life History Crops Neonicotinoid Pesticide
Most Recent Publications
Adverse effects of inbreeding on the transgenerational expression of herbivoreinduced defense traits in Solanum carolinense
Chad T. Nihranz, Anjel M. Helms, John F. Tooker, Mark C. Mescher, Consuelo M. De Moraes, Andrew G. Stephenson, 2022, PLoS One
The effect of zinc fertilizer on maize growth, leaf mineral nutrition, and caterpillar herbivory
Elizabeth K. Rowen, John F. Tooker, 2022, Arthropod-Plant Interactions on p. 525-535
Planted-green cover crops in maize/soybean rotations confer stronger bottom-up than top-down control of slugs
Marion Le Gall, Matthew Boucher, John F. Tooker, 2022, Agro-Ecosystems
Robert J. Warren, Antoine Guiguet, Chloe Mokadam, John F. Tooker, Andrew R. Deans, 2022, American Naturalist on p. 292-301
Early-season plant cover supports more effective pest control than insecticide applications
Elizabeth K. Rowen, Kirsten A. Pearsons, Richard G. Smith, Kyle Wickings, John F. Tooker, 2022, Ecological Applications
Miguel Calvo-Agudo, John F. Tooker, Marcel Dicke, Alejandro Tena, 2022, Biological Reviews on p. 664-678
More phylogenetically diverse polycultures inconsistently suppress insect herbivore populations
Angela M. Coco, Eric C. Yip, Ian Kaplan, John F. Tooker, 2022, Oecologia on p. 1057-1072
Linking water quality stressors and macroinvertebrate diversity in central Pennsylvania using passive samplers
Francesca M. Ferguson, Kyle R. Elkin, Robert Stout, Tamie L. Veith, John F. Tooker, Heather E. Preisendanz, 2022,
Preventative pest management in field crops influences the biological control potential of epigeal arthropods and soil-borne entomopathogenic fungi
Lindsay Johnston-Fennell, John Tooker, Brian A. Nault, Kyle Wickings, 2021, Field Crops Research
Life History, Biology, and Distribution of Pterostichus melanarius (Coleoptera: Carabidae) in North America
Anna K. Busch, Briana E. Wham, John F. Tooker, 2021, Environmental Entomology on p. 1257-1266
A framework for evaluating ecosystem services provided by cover crops in agroecosystems
Meagan E. Schipanski, Mary Barbercheck, Margaret R. Douglas, Denise M. Finney, Kristin Haider, Jason P. Kaye, Armen R. Kemanian, David A. Mortensen, Matthew R. Ryan, John Tooker, Charlie White, 2014, Agricultural Systems on p. 12-22
Large-scale deployment of seed treatments has driven rapid increase in use of neonicotinoid insecticides and preemptive pest management in U.S. Field crops
Margaret R. Douglas, John F. Tooker, 2015, Environmental Science & Technology on p. 5088-5097
Seung Ho Chung, Cristina Rosa, Erin D. Scully, Michelle Peiffer, John F. Tooker, Kelli Hoover, Dawn S. Luthe, Gary W. Felton, 2013, Proceedings of the National Academy of Sciences of the United States of America on p. 15728-15733
Kevin B. Rice, Chris J. Bergh, Erik J. Bergmann, Dave J. Biddinger, Christine Dieckhoff, Galen Dively, Hannah Fraser, Tara Gariepy, George Hamilton, Tim Haye, Ames Herbert, Kim Hoelmer, Cerruti R. Hooks, Ashley Jones, Greg Krawczyk, Thomas Kuhar, Holly Martinson, William Mitchell, Anne L. Nielsen, Doug G. Pfeiffer, Michael J. Raupp, Cesar Rodriguez-Saona, Peter Shearer, Paula Shrewsbury, P. Dilip Venugopal, Joanne Whalen, Nik G. Wiman, Tracy C. Leskey, John F. Tooker, 2014, Journal of Integrated Pest Management
Anthony D. Vaudo, John F. Tooker, Christina M. Grozinger, Harland M. Patch, 2015, Current Opinion in Insect Science on p. 133-141
Macronutrient ratios in pollen shape bumble bee (Bombus impatiens) foraging strategies and floral preferences
Anthony D. Vaudo, Harland M. Patch, David A. Mortensen, John F. Tooker, Christina M. Grozinger, 2016, Proceedings of the National Academy of Sciences of the United States of America on p. E4035-E4042
Neonicotinoid insecticide travels through a soil food chain, disrupting biological control of non-target pests and decreasing soya bean yield
Margaret R. Douglas, Jason R. Rohr, John F. Tooker, 2015, Journal of Applied Ecology on p. 250-260
Phytohormone Dynamics Associated with Gall Insects, and their Potential Role in the Evolution of the Gall-Inducing Habit
John F. Tooker, Anjel M. Helms, 2014, Journal of Chemical Ecology on p. 742-753
Herbicide drift can affect plant and arthropod communities
J. Franklin Egan, Eric Bohnenblust, Sarah Goslee, David Mortensen, John Tooker, 2014, Agro-Ecosystems on p. 77-87
Pollen protein: Lipid macronutrient ratios may guide broad patterns of bee species floral preferences
Anthony D. Vaudo, John F. Tooker, Harland M. Patch, David J. Biddinger, Michael Coccia, Makaylee K. Crone, Mark Fiely, Jacob S. Francis, Heather M. Hines, Mackenzie Hodges, Stephanie W. Jackson, Denis Michez, Junpeng Mu, Laura Russo, Maliheh Safari, Erin D. Treanore, Maryse Vanderplanck, Eric Yip, Anne S. Leonard, Christina M. Grozinger, 2020, Insects
News Articles Featuring John Tooker
Sep 05, 2022
A boy’s backyard discovery two years ago uncovered an incredibly intricate insect-plant interaction
A chance discovery by a professor’s son reveals a surprisingly complex interaction between plants and insects.
Mar 21, 2022
The Fight to Save the Embattled Monarch Butterfly
In the depths of the Californian winter, an ember of hope has flickered for the monarch butterfly, the charismatic and beloved visitor that has seemingly been on a graceful descent into oblivion.
Mar 09, 2022
EPA Expected to Extend Use of Bee-Killing Pesticides
The U.S. Environmental Protection Agency (EPA) is expected to approve a proposal to extend the use of four neonicotinoids for the next 15 years. These pesticides are known to be especially dangerous for essential pollinators, like bees and butterflies, and have been linked to the widespread decline of insect populations.
Mar 08, 2022
Fears for bees as US set to extend use of toxic pesticides that paralyse insects
The US Environmental Protection Agency is poised to allow the use of four of the most devastating chemicals to bees, butterflies and other insects to continue in America for the next 15 years, despite moves by the European Union to ban the use of toxins that have been blamed for widespread insect declines.
Feb 22, 2022
Farmers are overusing insecticide-coated seeds, with mounting harmful effects on nature
Planting season for corn and soybeans across the U.S. will begin as soon as March in Southern states and then move north. As farmers plant, they will deploy vast quantities of insecticides into the environment, without ever spraying a drop.
Apr 05, 2021
US Pesticide Use Is Down, but Damage to Pollinators Is Rising
The use of pesticides has decreased in the US by more than 40 percent since 1992, but the emergence of more-potent chemicals means that they are far more damaging to many species.
Apr 01, 2021
Birds versus bees: Here are the winners and losers in the great pesticide trade-off
Farms are battlefields, pitting growers against rapacious pests and aggressive weeds in never-ending, costly campaigns that often involve chemical weapons. Those weapons, alas, also harm innocent bystanders such as bees, fish, and crustaceans. Now, a large study charts epic shifts that have occurred in recent decades as U.S. farmers have changed their arsenal of pesticides.
Jan 12, 2021
Climate change reduces the abundance and diversity of wild bees, study finds
Wild bees are more affected by climate change than by disturbances to their habitats, according to a team of researchers led by Penn State. The findings suggest that addressing land-use issues alone will not be sufficient to protecting these important pollinators.
Jul 09, 2020
Gall fly outmaneuvers host plant in game of 'Spy vs. Spy'
Over time, goldenrod plants and the gall flies that feed on them have been one-upping each other in an ongoing competition for survival. Now, a team of researchers has discovered that by detecting the plants’ chemical defenses, the insects may have taken the lead.
Aug 22, 2019
Half a billion dead honey bees in Brazil show what happens when you roll back pesticide regulations
Insecticides kill insects. It should be no surprise, then, that in Brazil, which has seen a 27% increase in pesticide sales since last year, roughly 500 million honey bees were found dead in piles across four states in early spring.