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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » Research » Publications at this Location » Publication #193319
Title: EFFECT OF IRRIGATION DEFICIT ON THE POPULATION DYNAMICS OF HOMALODISCA COAGULATA (HEMIPTERA: CICADELLIDAE)

Author
item KRUGNER, R - UNIV OF CALIF-RIVERSIDE
item Groves, Russell
item Hagler, James
item LUCK, R - UNIV OF CALIF-RIVERSIDE
item JOHNSON, M - UNIV OF CALIF-RIVERSIDE

Submitted to: Entomology Society of America Pacific Branch Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 1/15/2006
Publication Date: 3/5/2006
Citation: Krugner, R., Groves, R.L., Hagler, J.R., Luck, R., Johnson, M. 2006. Effect of Irrigation Deficit on the Population Dynamics of Homalodisca Coagulata (hemiptera: cicadellidae). 90th Annual Meeting Pacific Branch, Entomological Society of America Abstracts. Available: http://pbesa.prosser.wsu.edu/2006abs.pdf

Interpretive Summary:

Technical Abstract: The glassy-winged sharpshooter (GWSS), Homalodisca coagulata (Say), was first detected in Southern California in the late 1980’s and rapidly spread new Xylella fastidiosa infections in vineyards throughout the Temecula area. Within its wide host range, citrus is the preferred overwintering and reproductive host found in California, however, little is understood about the behavioral responses to environmental cues that assist its host-location strategies. We monitored the population dynamics of GWSS and its associated natural enemies in a citrus orchard to elucidate adult host selection behavior and ovipositional preference on citrus trees maintained under continuous irrigation schedules receiving 100%, 80%, and 60% of the evapotranspiration rates (ETc). Throughout the season, we monitored plant and microclimate condition with records of leaf temperature, trunk water potential, and temperature and humidity inside tree canopy. Citrus trees irrigated with 60% ETc had warmer leaves and higher water potential than the trees irrigated with 100% and 80% ETc. Mean numbers of adults collected on beat samples, caught on sticky traps, and observed during the visual inspection, and egg masses within foliage were generally higher in the 100% and 80% ETc treatments than the 60% ETc treatment. Insect movement and distribution within the orchard will be discussed.