Spatial and Temporal Dynamics of Overwintering Homalodisca coagulata (Hemiptera: Cicadellidae)

Park, Yong‐Lak; Perring, Thomas M.; Yacoub, Rosie; Bartels, David W.; Elms, David

doi:10.1093/jee/99.6.1936

Cited by 21 publications

(15 citation statements)

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“…This species overwinters as adults (Turner and Pollard 1959), and during that period, a majority of the females seem to be reproductively inactive (Hummel et al 2006). During winter, however, the adults feed and ßy during warm conditions (Pollard and Kaloostian 1961, Blua and Morgan 2003, Almeida et al 2005, Park et al 2006. Therefore, if feeding of H. vitripennis adults is inßuenced by temperature conditions, the prevailing low winter temperatures of speciÞc areas in northern and central California may limit feeding activity, which would further increase overwintering mortality.…”

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confidence: 99%

Influences of Temperature onHomalodisca vitripennis(Hemiptera: Cicadellidae) Survival Under Various Feeding Conditions

Son¹,

Groves²,

Daane³

et al. 2009

Environ Entomol

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Survival of the glassy-winged sharpshooter, Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), was studied under various constant temperatures and feeding conditions. When provided a host plant (Citrus limon L. Burm. f.) to feed on during a 21-d trial, 100% mortality occurred at 0.1, 3.2, and 40.1 degrees C, whereas an average of 74-76% of adults survived in the 13.2-24.5 degrees C range. When individually confined with moist cotton, adult longevity was greatest (16.3 d) at 13.3 degrees C, but it was <3 d at -2.4 and 36.2 degrees C. In a companion study comparing the presence versus absence of a host plant, the presence of a host plant was not a significant factor influencing survival at temperatures < or =7.8 degrees C but was at temperatures > or =18.9 degrees C. The relationship between temperature and survival was described by a nonlinear function that estimated the optimum temperature in each feeding regimen: no host plant or moist cotton (5.5 degrees C), moist cotton (9.9 degrees C), and accessible host plant (25.1 degrees C). The model quantitatively predicted that H. vitripennis would survive longer periods at a wider temperature regimen when provided with a host plant than when provided with water alone (moist cotton) or when provided with neither plant host nor water. Our results suggest that continuous exposure to either low (<5 degrees C) or high (>30 degrees C) temperatures are detrimental for adult survival. Specifically, low temperatures caused early mortality because of inhibition of feeding activity and presumably this threshold lies between 7.8 and 13.2 degrees C. Furthermore, this study clearly shows that temperature may influence the survival of H. vitripennis adults regardless of feeding regimens, and its implications for population dynamics are discussed.

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confidence: 99%

Influences of Temperature onHomalodisca vitripennis(Hemiptera: Cicadellidae) Survival Under Various Feeding Conditions

Son¹,

Groves²,

Daane³

et al. 2009

Environ Entomol

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“…), and oleander had the highest H. vitripennis densities (Table 2). Previous reports of sticky trap catches in the General Beale area showed citrus, stone fruit (generally located near citrus groves), and table grape was the preferred H. vitripennis host before the areawide treatment program (Park et al 2006). Our Þndings show that some windbreak plant species (e.g., eucalyptus, jojoba) are serving as a host for residual H. vitripennis populations, especially when conditions in citrus are not favorable.…”

Section: Discussionmentioning

confidence: 47%

“…Our results are similar to those reported from the same San Joaquin Valley region. Park et al (2006) found 4.8 per trap per wk before areawide treatments in the General Beale region began (2000 Ð2001) and 0.04 H. vitripennis per sticky trap per wk after the areawide treatment program began (2001Ð2004).…”

Section: Discussionmentioning

confidence: 99%

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Distribution of Glassy-Winged Sharpshooter and Threecornered Alfalfa Hopper on Plant Hosts in the San Joaquin Valley, California

Wistrom

Sisterson

Pryor³

et al. 2010

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Homalodisca vitripennis (Germar) and Spissistilus festinus (Say) populations were surveyed bimonthly for 14 mo in Kern County, CA, at five agricultural sites made up of a variety of potential host plants. In addition, S. festinus populations were surveyed in four alfalfa, Medicago sativa L., fields in Kern and Tulare counties. Insects were collected by beats-sweeps and sticky traps. Data on host plant condition and phenology, and ground cover presence and composition were collected at the five agricultural sites, whereas data on mowing and insecticide use were collected at the four alfalfa sites. Populations of both insects persisted at the five agricultural locations despite insecticide applications applied as part of a H. vitripennis areawide management program and standard commercial operations. Plants colonized by H. vitripennis included eucalyptus (Eucalyptus L'Hér.), jojoba [Simmondsia chinensis (Link) C. K. Schneid.], and citrus (Citrus spp.). Populations of S. festinus were much greater in collections from alfalfa fields than from the five agricultural sites. Insects collected from the five mixed agricultural sites were negative for presence of X. fastidiosa. In laboratory tests, S. festinus did not acquire or transmit X. fastidiosa in tests with infected grape (Vitis spp.) as an acquisition source and grape, almond [Prunus dulcis (Mill.) D.A.Webb], and alfalfa as inoculation hosts. Recommendations for vector control, vegetation management, and targeted monitoring to reduce insect populations and inoculum potential are discussed.

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“…However, more recent surveys in alfalfa showed trap location and Þeld quality impacted trap catch, with higher numbers of D. minerva caught when traps were placed in weedy sections of the Þelds . This is in contrast to the sharpshooters G. atropunctata and H. vitripennis that can be effectively monitored with yellow sticky traps (Goodwin and Purcell 1992, Park et al 2006. Sweep netting probably underreported the presence and numbers of D. minerva nymphs.…”

Section: Discussionmentioning

confidence: 94%

Seasonal Abundance of Draeculacephala minerva and Other Xylella fastidiosa Vectors in California Almond Orchards and Vineyards

et al. 2011

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Almond leaf scorch (ALS) disease is caused by the bacterium Xylella fastidiosa and transmitted by xylem-feeding insects. Reports of increased incidence of ALS-diseased trees in California prompted surveys in three almond [Prunus dulcis (Mill.) D. A. Webb]-growing regions, from June 2003 to September 2005, to determine insect vector species composition and abundance. For comparison, sampling in and near vineyards in the San Joaquin Valley, California, also was completed. Sampling in or near almond orchards collected >42,000 Cicadomorpha of which 4.8% were xylem feeders, including 1912 grass sharpshooter, Draeculacephala minerva Ball; five Xyphon fulgida Nottingham; and a single spittlebug, Philaenus spumarius L. The most abundant vector was D. minerva. Season-long sampling indicated that D. minerva was a year-round resident in and/or near almonds in the Sacramento Valley, but not in the San Joaquin Valley. Similarly, D. minerca was rare in vineyards in the San Joaquin Valley, but was abundant in irrigated pastures near vineyards. D. minerva was most frequently collected along orchard margins, and peak densities were observed in summer, the period of time when bacterial titers are reported to increase in infected trees. Screening of D. minerva for presence of X.fastidiosa found that 1.1% of insects collected near almond orchards and 4.5% of insects collected from pastures tested positive. The X. fastidiosa subspecies and genotype detected in insects collected from orchards matched those collected from ALS-diseased almond trees in the same orchard. Of the few X. fulgida and P. spumarius collected, none tested positive for X. fastidiosa. Results are discussed with respect to X. fastidiosa vector control and detection methods.

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Spatial and Temporal Dynamics of Overwintering Homalodisca coagulata (Hemiptera: Cicadellidae)

Cited by 21 publications

References 0 publications

Influences of Temperature onHomalodisca vitripennis(Hemiptera: Cicadellidae) Survival Under Various Feeding Conditions

Influences of Temperature onHomalodisca vitripennis(Hemiptera: Cicadellidae) Survival Under Various Feeding Conditions

Distribution of Glassy-Winged Sharpshooter and Threecornered Alfalfa Hopper on Plant Hosts in the San Joaquin Valley, California

Seasonal Abundance of Draeculacephala minerva and Other Xylella fastidiosa Vectors in California Almond Orchards and Vineyards

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