Field observations on the beet leafhopper, Eutettix tenellus, in California

Severin, Henry H. P.

doi:10.3733/hilg.v07n08p281

Cited by 38 publications

(41 citation statements)

References 21 publications

(29 reference statements)

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“…Comparisons between available host records for eight (Ceratagalia bigeloviae, Circulifer tennellus, Driotura vittata, Empoasca mexicana, Mesamia coloradensis, Scaphytopius frontalis nigricolis, and Spathanus acuminatus) of the 13 studied leafhoppers showed 75% of similarity with our results (Ball 1907, Lawson 1928, DeLong 1932, Severin 1933, Hepner 1947, Ellsbury and Nielsen 1978, Gandolfo and Richman 1996. Differences in host use were strong enough to be detected despite the low number of collected leafhoppers.…”

Section: Resultssupporting

confidence: 88%

“…Circulifer tenellus used 10 (77%) plant species in proportion to their availability, avoided three plant species, and was collected mostly (90%) in the fall. Circulifer tenellus has been documented to be a polyphagous leafhopper attacking desert plants in the fall and several crops in the summer (Severin 1933). Driotura vitata used seven (54%) plants species at random (avoided six) and was collected only during spring and summer.…”

Section: Resultsmentioning

confidence: 99%

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Plant Utilization Patterns of a Guild of Leafhoppers on a Woody Plant Community in the Chihuahuan Desert

Logarzo¹,

Richman

Gould

2002

Environ Entomol

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Plant Utilization Patterns of a Guild of Leafhoppers on a Woody Plant Community in the Chihuahuan Desert

Logarzo¹,

Richman

Gould

2002

Environ Entomol

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“…A parasItic nematode belonging to the Goridiaceae (Nemataphorpha) was occasionally found attacking the beet leafhopper (179). Mermithid in festations in leafhoppers have been reported in Japan, ranging from 40 to 70 percent in certain years, which have given a practical control of certain species (203).…”

Section: Nematode Parasitesmentioning

confidence: 99%

The Bionomics of Leafhoppers

DeLong¹

1971

Annu. Rev. Entomol.

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The recent publication of the Metcalf catalogue of world Cicadelloidea (128) listed 4378 species, placed in 591 genera and 54 subgenera. These were assigned to the following 17 different families: Tettigellidae, Hylici dae, Gyponidae, Ledridae, Ulopidae, Evacanthidae, Nirvanidae, Aphrodidae, Hecalidae, Euscelidae, Coelidiidae, Eurymclidae, Macropsidae, Agalliidae, Iassidae, Idioceridae, and Cicadellidae. The catalogue includes all of the lit erature on the leafhoppers to 1942. Since that time at least 1200 additional species and 100 additional genera have been described. The world literature at the present time therefore covers some 5500 to 6000 species and probably 700 or more genera.Morphological characters have been used predominantly for the classifi cation of the leafhoppers, particularly the type, form, and venation of wings, structures of the head and crown, position of the ocelli, general shape of the body, and the genital structures of both sexes. The character of the structures of the male genital chamber, the styles, aedeagus, connective, plates, pygofer, and the apodemes on the anterior portion of the abdomen have been used especially for the separation of species. In most groups these characters are excellent for specific identification. In a few groups, Oncop sis Burmeister, for instance, they have proved to be of little or no value. ISOLATED POPULATIONS, MUTANTS AND SPECIES CONCEPTSCertain species of leafhoppers such as Macrosteles fascifrons have a wide geographical range through different life zones extending from Mex ico and Puerto Rico to Alaska, from tropical to arctic habitats. As now rec ognized by taxonomists, this species is a complex of genetic mutants rang ing in size from 2.0 to 5.1 mm and occurring on a great variety of host plants. Economic and ecologic studies have revealed isolated popUlations of this species which were biologically, ecologically, or physiologically specific but could not be separated morphologically. Beirne (6), after a detailed study of all of the material in the genus Ma cyosteles, has affirmed that physiologic species and isolated ecologic popula tions undoubtedly exist and that the progeny of certain populations are sed entary, which would favor isolation. Severin (180) failed in his attempt to mate a long-winged form from the Montara Mountains of California with a short-winged form from the eastern United States. With the exception of the wing condition these were not different morphologically. The occur-179 6007 Annu. Rev. Entomol. 1971.16:179-210. Downloaded from www.annualreviews.org Access provided by Michigan State University Library on 02/07/15. For personal use only. Quick links to online content Further ANNUAL REVIEWS

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“…However, during the hot, dry summer months of this region, preferred weed hosts die around late April-early May, forcing BLH into irrigated crops such as potatoes (Cook 1942). While BLH may be present in potato fields all season long, they do not necessary feed on potatoes or reproduce on this crop as it is not a preferred host (Cook 1967;Hills 1937;Severin 1930).…”

Section: Introductionmentioning

confidence: 98%

“…This insect feeds on weed hosts through the fall, winter and spring (Cook 1942;Hills 1937). Weeds, including redstem filaree (Erodium cicutarium L.), Russian thistle (Salsola iberica Sennen), tumble mustard (Sisymbrium altissimum L.) and flixweed (Descurainia sophia L.), are preferred hosts for the BLH (Hills 1937;Severin 1930). In the Columbia Basin, there are at least three generations of BLH that survive mainly on weeds: a spring generation, a summer generation, and a fall generation (Hills 1937).…”

Section: Introductionmentioning

confidence: 98%

Monitoring and Controlling the Beet Leafhopper Circulifer tenellus in the Columbia Basin

Rondon

Murphy

2016

Am. J. Potato Res.

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The beet leafhopper (BLH, Circulifer tenellus Baker) is a frequent pest of potatoes in the Columbia Basin of Oregon and Washington. Beet leafhoppers vector the causal agent of potato Purple top disease, known as Beet Leafhopper Transmitted Virescence Agent (BLTVA). Over 70 % of BLH in the region can be infected with BLVTA. Current control methods include making regular insecticide applications beginning in May; however it is unclear if those applications are needed. Thus, are insecticide applications necessary to control BLH and reduce BLTVA through the entire season? To answer that question, a field study was conducted in 2008 and 2009 to assess season-long control of BLH. There were 14 treatments, including the control, that were based on gradually eliminating insecticide applications weekly. Plots were sampled weekly for BLH and surveyed for Purple Top disease. Beet leafhoppers were sampled using sweep nets and an inverted leaf blower. Natural BLH populations were low in 2008 and 2009, but differed significantly among treatments in 2009 for inverted leaf blower and sweep net samples. Yields were assessed at the end of each season and no significant differences were found. Trends in the yield, BLH populations and BLTVA incidence support earlyseason insecticide application when BLH populations are low. The practice of using a calendar spray regime was not supported as yields were similar regardless of insecticide applications. As BLH populations were low, the results emphasized the importance of monitoring before making insecticide applications.Resumen La chicharrita del betabel (BLH, Circulifer tenellus Baker) es una plaga frecuente de las papas en la cuenca del Columbia de Oregón y Washington. Las chicharritas son vectores del agente causal de la enfermedad de la punta morada de la papa, conocida como el agente de la virescencia transmitida por la chicharrita del betabel BLTVA (siglas en inglés). Más del 70 % de BLH en la región pueden estar infectada con BLVTA. Los métodos actuales de control incluyen aplicaciones regulares de insecticidas empezando en Mayo; no obstante, no queda claro si esas aplicaciones son necesarias.De aquí que, ¿son necesarias las aplicaciones de insecticidas para controlar BLH y reducir BLTVA a lo largo de todo el ciclo de cultivo? Para contestar esta pregunta se condujo un estudio en 2008 y 2009 para analizar el control del BLH en todo el ciclo. Fueron 14 tratamientos, incluyendo el testigo, con base en la eliminación gradual de las aplicaciones semanales de insecticida. Se muestrearon los lotes semanalmente para BLH y se observó la enfermedad de la punta morada. Se muestrearon las chicharritas usando redes de barrido y una sopladora invertida de hojas. Las poblaciones naturales de BLH fueron bajas en 2008 y 2009, pero difirieron significativamente en las muestras entre los tratamientos en 2009 para la sopladora invertida de hojas y de las redes de barrido. Se analizaron los rendimientos al final de cada ciclo y no se encontraron diferencias significativas. Las tendencias en el rendim...

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Field observations on the beet leafhopper, Eutettix tenellus, in California

Cited by 38 publications

References 21 publications

Plant Utilization Patterns of a Guild of Leafhoppers on a Woody Plant Community in the Chihuahuan Desert

Plant Utilization Patterns of a Guild of Leafhoppers on a Woody Plant Community in the Chihuahuan Desert

The Bionomics of Leafhoppers

Monitoring and Controlling the Beet Leafhopper Circulifer tenellus in the Columbia Basin

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