Past webinars - citrus pests

As webinars are completed, we post them here for future study and sharing with others. CE units are not available for this group, as only the live webinars receive credits.

Development of a Highly Successful Biocontrol Program for Asian Citrus Psyllid in California Citrus by Dr. Mark Hoddle (April 3, 2024)

UC Riverside Biological Control Specialist Dr. Mark Hoddle discussed Asian ctirus psyllid (ACP) and the development of the ACP biocontrol program with parasitoids (Tamarixia radiata) imported from Pakistan. He discussed the massive impacts they have had on ACP populations and the latest developments in the control of Argentine ant and conservation biocontrol practices that enhance natural enemy impacts in commercial citrus orchards. (Presentation slides in PDF format)

Citrus Mealybugs in the San Joaquin Valley by Dr. Sandipa Gautam (July 27, 2022)

UCCE Area Citrus IPM Advisor discussed mealybugs in citrus and how they have become more of a problem over the last 2 to 3 years. Biology, monitoring and management options were discussed. (Presentation slides in the PDF format)

Mites in California Citrus by David Haviland (February 17, 2021)

UCCE Farm Advisor David Haviland discussed integrated pest management for several different species of mites that cause economic damage to citrus in California, including proper identification, monitoring, and tools for management.

Diseases of Citrus by Dr. Peggy Mauk (December 2, 2020)

Dr. Peggy Mauk discussed identification and control of root rot and gummosis of citrus, citrus viruses and viroids, advances in protecting citrus from Huanglongbing, and citrus diseases with postharvest/export issues/treatments.

Use of Plant Growth Regulators on Citrus by Dr. Ashraf El-Kereamy (August 19, 2020)

Dr. El-Kereamy discussed the use of plant growth regulators that are registered for use on California citrus to increase fruit set, prevent fruit senescence, control preharvest fruit drop, and to control suckering. (Presentation slides in the PDF format)

Argentine Ant Biology and Management in Citrus by Dr. Mark Hoddle (July 8, 2020)

Dr. Hoddle presented about how to monitor and manage Argentine ant in citrus orchards with liquid baiting systems and discussed why ant management has such strong benefits for the suppression of sap-sucking pests by natural enemies. This information is critical for PCAs and growers to better understand why managing Argentine ant is important. (Presentation slides in the PDF format)

Citricola Scale by Dr. Elizabeth Grafton-Cardwell (April 8, 2020)

Dr. Grafton-Cardwell discussed the key stages of citricola scale and how they damage citrus, weather trends that help reduce citricola scale, chemical control choices and their relative efficacy, coverage, and timing of treatments, and monitoring for resistance and methods to manage resistance. (Presentation slides in the PDF format)

Pesticide Resistance Management of Citrus Pests by Dr. Elizabeth Grafton-Cardwell (February 19, 2020)

Dr. Grafton-Cardwell talked about how insects develop resistance (including examples of resistance in citrus thrips, California red scale, and citricola scale), pesticide use tactics to avoid resistance, the potential for resistance in Asian citrus psyllid, and best practices for citrus pest management. (Presentation slides in the PDF format)

Asian Citrus Psyllid for Backyard Growers by Dr. Elizabeth Grafton-Cardwell (December 5, 2019)

Dr. Grafton-Cardwell discussed Asian citrus psyllid (ACP) as a vector of HLB, symptoms and distribution of HLB, monitoring methods for ACP and HLB and what to do if you think you have them, how weather and flush affect populations, what are the scientists doing about HLB, and what should you as a homeowner be doing if you are in an HLB-infected area. (Presentation slides in the PDF format)

Asian Citrus Psyllid For Commercial Growers And Pest Control Advisers by Dr. Elizabeth Grafton-Cardwell (December 4, 2019)

Dr. Grafton-Cardwell discussed Asian citrus psyllid (ACP) as a vector of huanglongbing (HLB) disease, distribution of HLB, monitoring methods for ACP, pesticide recommendations for area-wide and eradicative strategies, how weather, flush and pesticides affect ACP populations, cultural tactics for managing psyllids, early detection tactics for detecting HLB, and mandatory and voluntary grower response to HLB. (Presentation slides in the PDF format)

California Red Scale by Dr. Elizabeth Grafton-Cardwell (September 25, 2019)

Dr. Grafton-Cardwell discussed biology, biological control, temperature effects, damage, monitoring, chemical control, and resistance issues for California red scale. (Presentation slides in the PDF format)

Understanding Effective Citrus Spray Application Through Computer Simulations by Dr. Peter Ako Larbi (August 21, 2019)

Dr. Larbi discussed how to achieve sufficient spray deposition and demonstrated computer-simulated data to explain how different techniques may be used to optimize deposition for improved pest control. (Presentation slides in the PDF format)

Citrus Dry Root Rot by Dr. Akif Eskalen (July 24, 2019)

Dr. Eskalen discussed the symptoms, biology, and management of citrus dry root rot.

Management of Weeds in Citrus Orchards by Dr. Travis Bean (June 19, 2019)

Dr. Bean discussed the importance of weed management in citrus, tree age and variety considerations, scouting and weed identification, cultural and mechanical practices, and pre- and post-emergence herbicides. (Presentation slides in the PDF format)

Management of Plant-Parasitic Nematodes in Citrus Orchards by Dr. Ole Becker (February 21, 2019)

Dr. Becker discussed plant-parasitic nematodes in citrus, their biology, symptoms, and management, including soil & root sampling, interpretation of analysis results, and rootstock selection.

Fuller Rose Beetle by Dr. Elizabeth Grafton-Cardwell (January 23, 2019)

Dr. Grafton-Cardwell discussed the lifecycle of the Fuller rose beetle (FRB), types of damage that FRB causes, seasonal dynamics of FRB populations, monitoring methods, biological, cultural and chemical control practices, and the systems approach for managing FRB for the export market. (Presentation slides in the PDF format)

Citrus Thrips by Dr. Elizabeth Grafton-Cardwell (October 17, 2018)

Dr. Grafton-Cardwell discussed biology, biological control, temperature effects, damage, monitoring, chemical control, and resistance issues for citrus thrips. (Presentation slides in the PDF format)