Dept. of Entomology
Univ. of California-Davis
Office: 73 Briggs Hall
Lab: 78 Briggs Hall
Phone: (530) 752-0473
Fax: (530) 752-1537
My lab strives to develop and assimilate management tactics into viable integrated pest management programs for important mite and insects pests of major crops in California. Many of these crops have a world-wide presence (rice and cotton), therefore contacts and collaboration are in place internationally. Various management tactics for pests, i.e., biological control, reduced risk insecticides, mating disruption, cultural control, host plant resistance, etc., are researched as appropriate for the pest/crop situation. This approach is employed in order examine and to attempt to gain insights about the entire system so as to provide usable results that can be extended to agricultural industries in California. Since growers manage crops using a "systems approach", my research philosophy is designed aid in their endeavors. These studies while being relevant can also advance the field of IPM and applied ecology.
Lab Members - Davis lab
Ian Grettenberger (post-doctoral researcher)
Ph.D. Penn State University, 2015
I am an applied insect ecologist, and I have been working in agricultural systems. At UC Davis, I am working on a project studying bagrada bug ecology and management. This project is a collaboration between the lab here at UC Davis and UC Cooperative Extension Monterey County in Salinas (Shimat Joseph and Richard Smith). The bagrada bug is an invasive stink bug pest that feeds on cruciferous vegetables and is particularly problematic in CA, NM, and AZ. Our study area is the Salinas Valley (Salinas to San Ardo), which produces a large quantity of vegetable crops. Importantly, this area is a key growing region for cruciferous crops, including broccoli, cauliflower, cabbage, kale, arugula, and other leafy greens, all of which bagrada bugs will feed on. Bagrada bugs are particularly problematic for newly planted fields, which are highly susceptible to injury by adults sweeping through fields.
This project has a number of different components. In one large part of the project, I am investigating the role of non-crop habitat for bagrada bug population dynamics. Infestations in fields are generally limited to mid-summer to fall. This coincides with the period of time when several key cruciferous weeds (shortpod mustard and perennial pepperweed) dry down. We have been tracking bagrada bug populations on non-crop hosts up and down the Valley for nearly two years now. Populations have start increasing in early- to mid-summer and then tail off in the fall. I have also looked at how weed species and weed phenology and characteristics affect bagrada bugs at the individual or population level. These weeds are clearly important for development of bagrada bug populations at the landscape level and then movement of bugs into individual fields. Along with my collaborators, I have published a blog article about the role of weeds for bagrada bug management.
In other components of the project, we have examined aspects of bagrada bug biology (e.g., oviposition behavior), damage potential to cole crops, conventional and organic chemical control measures, and cultural control tactics. Conventional growers have been able to successfully control bagrada bug, but this control often takes the form of multiple applications of pyrethroid sprays. Sustainable management is going to include effective scouting coupled with well-timed insecticide applications when necessary, although we are attempting to minimize unnecessary applications as much as possible. Organic growers are much more limited in their control options, so we have been working to identify what tools we might use to prevent damage in organic fields.
If you are interested in talking about my work on bagrada bug, please don’t hesitate to contact me!
Joanna Bloese (graduate student researcher - Ph.D. student)
B.S California State University Chico 2013
I entered UC-Davis as a graduate student in the fall, 2014. I am working in the rice pest management system.
Kevin Goding (staff research associate)
I assist with lab projects at the Davis lab. These are primarily in rice with additional efforts in the alfalfa, melon, corn, and dry bean systems.
Stacey Rice - undergraduate researcher
Jasjeet Dhanota - undergraduate researcher
Hudson Hollister - undergraduate researcher
Lab Members - Shafter lab
Treanna Pierce (staff research associate)
My name is Treanna Pierce. I am Larry's SRAII in his lab located in Shafter,
CA. We mainly conduct studies on insect pests in cotton but do some work in
corn too. Our research is conducted both at the Shafter Research Station
and the West Side Research and Extension Center.
I have an AS degree in Forestry from Bakersfield College and a BS degree
from Cal Poly, 2005, in Crop Protection with an emphasis in Integrated Pest
Mngmt. I enjoy bugging bugs and manipulating the environment to meet human
needs in a sustainable way; working in the Godfrey lab allows for both in
numerous field crops.
Naomi Viss (lab researcher)
Erick Morales Galvez (lab researcher)
Yalitza Leyva (lab researcher)