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Past Research

2005 Peter Teal ( Improving Efficacy )

Improving Efficacy of Sterile Insect Technique for Mexican Fruit Fly and Mediterranean Fruit Fly

During 2004-2005 our research focused on several areas. The first was testing a new gel- based diet developed to take the place of the agar sugar block diet used to feed adult Tephritid flies prior to sterile insect technique (SIT) releases. Unfortunately, the gel formulation was deficient in protein which resulted in production of adults that were not efficient in producing pheromone or attracting females (Figures 1, 2). Formulation of the gel diet with additional protein, needed to improve reproductive competence, yielded an inconsistent formulation. Additionally, the gel diet was expensive and labor intensive to formulate. As such the gel diet was judged a poor substitute for the agar/sugar blocks.

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2005 Beth Grafton-Cardwell ( Efficacy trials )

San Joaquin Valley Insecticide Efficacy Trials for Citrus Pests

The purpose of this research program is to determine how insecticides can be used most effectively, with as little disruption of natural enemies as possible, as part of the citrus IPM program. Information derived from this project is used to update the UCIPM Pest Management Guidelines, produce Arthropod Management Test articles and help support registration of insecticides.

2005 J.E. Adaskaveg (Septoria)

Biology and Management of Septoria Spot of Citrus

Septoria spot of citrus caused by Septoria citri is found in many citrus-producing countries around the world. It is a sporadic disease in California with most reports coming from Tulare Co. and Fresno Co. The pathogen is present on leaves and twigs in many orchards, and fruit infections probably occur commonly. Disease from these quiescent infections, however, only develops when plant tissues become senescent or environmental conditions predispose the host to infection.

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2005 Abhaya Dandekar Seedlessness Strategies

Evaluating and Validating Seedlessness Strategies for Citrus

Seedy citrus fruit are a major quality issue and of significant concern to the citrus industry. Elimination of seed formation would be a valuable trait for many citrus cultivars, especially the mandarin varieties and seedy lemon varieties. In this project we will evaluate the role of ovule specific regulation of auxin to induce parthenocarpy in citrus.

2005 Hugh W. Ewart CCQC

California Citrus Quality Council ( CCQC ) Quality Assurance Program

As specifically provided for in the California Citrus Improvement Program marketing order, this ongoing Quality Assurance Program is conducted by the California Citrus Quality Council (CCQC) under an operating agreement with the California Citrus Research Board.

2005 Georgios Vidalakis CCPP

Citrus Clonal Protection Program (CCPP)

The California Citrus Clonal Protection Program (CCPP) is a part of the University of California, Riverside, Department of Plant Pathology. The CCPP is a cooperative program with the California Department of Food and Agriculture (CDFA), the United States Department of Agriculture Animal and Plant Health Inspection Service (USDA-APHIS) and the citrus growers of the state of California represented by the Citrus Research Board.

2005 R Krieger ( Potential Human Perchlorate Exposures..)

Development of a Rapid System for Detection of Stubborn Disease in the Field

Stubborn disease of citrus, caused by Spiroplasma citri, is an important disease of citrus in the hot, arid inland areas of California and Arizona. The two methods most commonly used for detection of stubborn have been biological indexing and culture in a cell-free medium. Indexing for stubborn disease of citrus is difficult since it requires the somewhat tricky side-graft or leaf vein method, and it takes several months to obtain results. Culturing is also somewhat time consuming, sometimes requires several attempts, and can produce false positives from contamination. Culturing is the test of record for CDFA and most regulatory agencies.

2005 M. McCarthy ( Development of Magnetic Resonance for Detection…)

Development of Magnetic Resonance for Detection of Freeze Damage In Oranges

Magnetic Resonance Imaging (MRI) has proven to be a valuable medical diagnostic tool for investigating damage in humans. This tool is useful in medicine since it provides information on “soft tissues” in the body such as muscles and tendons. Our project was focused on developing magnetic resonance for use in detecting damage to “soft tissues” in oranges.

2005 M Arpaia (Improving Postharvest Quality of Stored Lemons)

Improving Postharvest Quality of Stored Lemons

The goal of this research was to reduce economic losses to the lemon industry due to postharvest decay and to increase postharvest quality and storage life of lemons using the inexpensive naturally-occurring compounds spermidine, spermine and salicylic acid applied as a dip or drench after washing or in the storage wax. If successful, the research would identify a less-expensive material that is as effective or more effective than GA3 combined with 2,4-D.

2005 B. Wallach (Robotic Mechanical Harvester)

Robotic Mechanical Harvester for Fresh Market Citrus

The goal of the robot harvester project’s second phase, FY2004-2005, was to begin to validate Vision Robotics’ concept for mapping orange trees using the scout robot. The scout will map the grove determining the tree locations, the number and size of the oranges and their approximate positions on each tree. Once a tree and its oranges are mapped, the scout will determine a picking-plan for that tree, which it will transmit to a harvester robot.