Effects of Local and Landscape Factors on Population Dynamics of a Cotton Pest 2012. PLoS ONE 7(6): e39862. doi:10.1371/journal.pone.0039862 Many polyphagous pests sequentially use crops and uncultivated habitats in landscapes dominated by annual crops. As these habitats may contribute in increasing or decreasing pest density in fields of a specific crop, understanding the scale and temporal variability of source and sink effects is critical for managing landscapes to enhance pest control. The approach developed here is appropriate to characterize and test the source and sink effects of various habitats on pest dynamics and improve the design of landscape-level pest management strategies.
Understanding a Key Pest in the Cropping Landscape Poster. 7th International IPM Symposium, Memphis TN March 27-29 2012.
We propose using community crop landscape mapping approaches to understand the risk of L. hesperus infestation to an individual cotton field based on surrounding crop mosaic. Comparing the abundance of known crops which act as sources or sinks of L. hesperus to the maximum infestation in and number of insecticide applications to a field, patterns emerged to indicate relative risk of crop assemblages. Understanding such patterns in the landscape creates the opportunity for a community to develop planned landscapes to mitigate this key pest.
Approaches and Incentives to Implement Integrated Pest Management that Addresses Regional and Environmental Issues Annual Review of Entomology. 2012. Vol. 57:41–59
Over the past several decades, public-supported incentives, such as financial incentives available to farmers from conservation programs for farms, have begun to be employed to encourage use of conservation techniques, including strategies with IPM relevance. Combining private investments with public support may effectively address the incentives dilemma when advanced IPM strategies are used regionally and provide public goods such as those benefiting resource conservation.
Can surrounding landscapes be predictive of in-field pest infestation? Proceedings of the IOBC meeting in Lleida Spain, May 7-10, 2012
We propose using community mapping approaches to understand the risk of L. hesperus infestation to an individual cotton field based on surrounding crop mosaic. In 2011, we sampled arthropod populations from selected cotton fields and mapped surrounding crops to a distance of 3.2 km.
Volatile Organic Compounds, Pesticides and IPM 2011. Outlooks in Pest Management. 22(1): 10-13.
In recent years, environmental issues have been a primary driver of IPM programs, especially as they impinge on air and water quality. In California, air quality in particular is an important environmental resource on which pest management has an effect.
Managing the ecosystem for IPM: Effect of reduced irrigation allotments. Proceedings of the Calif Chapt Am Agronomy Society Plant & Soil Conference Tulare CA Feb 2-3 2010.
Managing key pests requires managing the environment in which their populations build and move. Understanding the role of cropping landscapes in population development across spatial and temporal scales is critical for increasing bio-intensive IPM practices. The landscape is continually changing and impacting the relationship between crops and insects. Reduced availability of irrigation resources has caused a major shift in cropping patterns, including increased production of safflower and deficit irrigation in alfalfa. Integration of production and pest management practices is essential to optimize the management of forces driving agriculture
IPM at the landscape scale: Tracing the tale of cotton IPM in the SJV of Central California
Proceedings of the IOBC meeting in Cambridge, UK, June 29 - July 1, 2010
For over 45 years, the cropping landscape has been recognized as a key component in managing Lygus hesperus in cotton. As the cotton landscape has become increasingly fragmented, more crops that serve as sources of L. hesperus have come into contact with cotton, creating new IPM challenges. We have studied the changes and are developing estimates of the "strength" of crops to act as sources for this pest.
Influence of Blackeye Variety, Spacing and Irrigation on Lygus Populations and Damage CAPCA Adviser Magazine, December 2010
Lygus bugs are key pests in legume crops, including cowpea or blackeye beans. A study was initiated in Kern County to evaluate the interaction of variety and irrigation practices on Lygus. Frequently irrigated and closely spaced plants were most attractive to Lygus.
Opportunities, Experiences & Strategies to Connect IPM... American Entomologist. 2009. 55:3:140-146.
The traditional emphasis of IPM is to use strategies, tactics, and tools that maintain pests at or below levels of economic concern, while minimizing risks to people and the environment. This emphasis is compatible with the primary thrust of U.S. farm bill conservation programs, which seek to improve natural resources.
Fifty years of the integrated control concept Pest Manag Sci. 2009; 65: 1293–1297
In the late 1950s, researchers recognized that ‘understanding the ecosystem’ was a key underpinning of integrated control. They developed cultural practices that took advantage of this to limit the need of pesticide intervention in cotton in the San Joaquin Valley during the 1960s and 1970s. Research and extension activities in the intervening years built upon those fundamental concepts using geospatial tools and analytical techniques to refine current understanding and develop ecological landscape level approaches to manage Lygus hesperus.
Contrasting Agronomic Performance and Pest Control 2010 Beltwide Cotton Conferences, New Orleans, Louisiana, January 4-7, 2010
The Biological Agriculture Systems in Cotton program provided technical advice and support services to enrolled growers who wish to develop a working knowledge of chemical reduction which emphasize biointensive farming practices.
California Cotton Growers Utilize IPM California Agriculture. 2007. Vol 61:24-30
In 2000, the UC Statewide Integrated Pest Management Program (UC IPM)conducted a comprehensive survey of pest management decision-making and pest control practices of cotton growers in the 11 major cotton producing counties of California.
Measuring Localized Movement of Lygus into SJV Cotton Fields 2006 Beltwide Cotton Conferences, San Antonio, Texas - January 3 - 6, 2006
In certain years, weed hosts are favored by precipitation patterns and these can provide extended habitat on which Lygus population can build. In 2005, tarweed, Hemizonia kelloggii, was abundant and widely distributed. Lygus populations were sampled weekly from tarweed on uncultivated rangeland and in the adjoining cotton.
Shifting Patterns in Insecticide Use In California Cotton – 1993-2004 2006 Beltwide Cotton Conferences, San Antonio, Texas - January 3 - 6, 2006
A subset of data from the California Department of Pesticide Regulation’s pesticide use data base was used to develop insecticide use trends in cotton from 1993-2004. There was a substantial decline in high risk insecticides and a large increase in low risk insecticides, especially since 2000.
Managing Lygus in the Landscape Proceedings of the Calif Chapt Am Agronomy Society Plant & Soil Conference, Fresno, CA February 6-7 2001.
There is no “silver bullet” solution to Lygus. No single insecticide, cultural technique, or biological approach will provide an economic and environmental satisfactory solution.