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Entomology – Page 3

2008 Joseph Morse (Management of Thrips )

Management of Citrus Thrips and Bean Thrips

At the advice of Citrus Research Board members, we merged our research on citrus thrips with work requested by industry to improve the systems approach used to reduce bean thrips levels on citrus shipped from California to Australia.

2008 Edwin E Lewis (Nematodes Agains Diaprepes)

Assessing the Efficacy of Entomopathogenic Nematodes Against Diaprepes abbreviatus in California Soils and Climates

Three specific objectives have been addressed in the first two years of the project: 1). We have collected and analyzed the following physical and chemical properties of soil from sites of citrus production throughout California: % of sand, silt and clay; pH, electrical conductivity, organic matter and moisture retention, % water, and water potential; 2). We have assayed all of these samples for the presence of native populations of entomopathogenic nematodes; and 3). We have tested the efficacy of entomopathogenic nematodes in each of the tested soils.

2008 Bruce McPheron (Tephritid Barcoding Initiative)

Tephritid Barcoding Initiative

The goal of this project was to develop a new diagnostic tool for pest fruit flies based upon DNA sequences. DNA diagnostics has emerged as a powerful tool for identifying unknown samples, particularly life stages for which there are not reliable morphological characteristics to use (in this case, eggs and larvae, for example).

2008 Beth Grafton Cardwell(Pest Management Infrastructure )

Pest Management Infrastructure

This Citrus Research Board funding supports three Staff ResearchAssociates located at theKearneyAgriculturalCenter and Lindcove Research and Extension Center. During 2007- 08, these SRAs conducted projects to improve integrated pest management of various pests including citrus peelminer, citrus leafminer, California red scale, citrus red mite, and citricola scale.

2007 Robert F Luck (Infrastructure for Armored Scale Research)

Infrastructure for
Armored Scale Research

California red scale (CRS) remains a key pest of citrus in the San Joaquin Valley and in the desert. This project’s mission is to support all aspects of armored scale pest management strategies. As new pests enter California citrus, CRS research must modify control tactics that can integrate into new pest management practices. This project seeks to foster research by UC Riverside and industry scientists by providing various armored scale, their associated parasitoids, and assistance in experimental design to achieve this goal.

2007 Luck and Morse (Parasitoids of Citricola Scale)

Parasitoid Preference for Citricola Scale in Southern CA vs. San Joaquin Valley Citrus

The full title of this project is, “Parasitoid Preference for Citricola Scale in Southern California versus San Joaquin Valley Citrus: which one or several species should we produce and release?”

2007 Joseph G Morse (Management of Thrips)

Management of Citrus Thrips

Despite funding for this project being cut in 2006-07 to 53% of what was received in both 2004-05 and 2005-06 due to the freeze, we are making very good progress on a number of research objectives. We finally have a new thrips control material to work with; in fact, two will be registered on citrus within the next year (Delegate from Dow and Movento from Bayer).

2007 Edwin E Lewis (Nematodes Against Diaprepes)

Assessing the Efficacy of Entomopathogenic Nematodes Against Diaprepes abbreviates

The full title of this project is, “Assessing the Efficacy of Entomopathogenic Nematodes against Diaprepes abbreviatus (Coleoptera: Curculionidae) in California soils and climates.” Our goal in this project is to determine where and when to apply entomopathogenic nematodes (EPNs) in citrus against the citrus root weevil, should it escape the present quarantine area in southern California.

2007 David Headrick (Field Mgmt & Biocontrol Peelminer)

Field Management Plan and Biocontrol Rearing System for Citrus Peelminer

Citrus peelminer pest management requires an ecological approach using techniques such as pheromone traps, a degree day model, and augmentative releases of natural enemies for successful control.

2007 Luck and Morse (Seasonal Phenology of Leafminer)

Seasonal Phenology of Citrus Leafminer; Rearing Native and Foreign Collected Parasitoids

The full title of this project is, “Seasonal Phenology of Citrus Leafminer; Rearing Native and Foreign Collected Parasitoids of Both Citrus Leafminer and Peelminer at the UCR Quarantine Facility.”

Citrus leafminer (CLM) has invaded four of the five California citrus growing regions and levels are building in the San Joaquin Valley (SJV). In certain citrus varieties in the SJV, citrus peelminer (PM) has become economic, as it has in the Coachella Valley. CLM is economic only on non-bearing citrus as the larvae mine the new flush, causing stunting and leaf drop. Conversely, PM is economic on bearing citrus as the larvae mine mature fruit, causing irreversible cosmetic damage.