Seasonal Occurrence and Abundance of Beet Leafhopper in the Potato Growing Region of Washington and Oregon Columbia Basin and Yakima Valley

Munyaneza, Joseph E.; Jensen, Andrew S.; Hamm, Philip B.; Upton, J. E.

doi:10.1007/s12230-008-9005-7

Cited by 25 publications

(28 citation statements)

References 27 publications

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“…Adult and nymphal population fluctuation patterns were similar, suggesting that no new influx of adult immigrants occurred during each season. In all planting seasons, E. terminalis populations peaked only once, indicating that only one complete generation of leafhopper established during each season (Munyaneza et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Adult and nymphal populations were assessed weekly starting one week after plant emergence until two weeks before harvest (10 sampling dates). Adult E. terminalis were sampled using a standard (38 cm diameter) sweep net (Munyaneza et al 2008). In each of the blocks, five round-sweeps were applied and E. terminalis samples were placed in 1-liter plastic jar, containing a cotton ball saturated with chloroform.…”

Section: Seasonal Abundance Of E Terminalismentioning

confidence: 99%

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Potential damages, seasonal abundance and distribution of Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean in South Sulawesi

et al. 2015

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Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi. The insect has been constantly associated with soybean crops in the province ever since. The purposes of the present study were to (i) evaluate potential yield loss attributable to the leafhopper in an experimental set up, (ii) seasonal abundance of E. terminalis, and (iii) distribution of E. terminalis in all major soybean-producing areas in the province. Potential yield loss due to the leafhopper was assessed in a field experiment using two large plots. One of the plots was kept leafhopper-free by weekly insecticide sprays; and the other plot was left unsprayed to allow leafhopper infestation to occur. Adult abundance was weekly monitored using a sweep net throughout the season. Nymph abundance was determined by direct count on the plant leaves. Leafhopper distribution was assessed through surveys conducted in all major soybean-producing areas in South Sulawesi, from 2009-2013. The results of the study showed that E. terminalis caused an average yield loss of 26% on susceptible crops without insecticide use. First leafhopper infestation in all planting seasons occurred two weeks after the plant emergence. Rainfall negatively correlated with the leafhopper abundance. The leafhopper existed in all major soybean production areas in the province. Therefore, our results confirmed the status of E. terminalis as an important soybean pest in the region. In addition, crops planted early in the dry season could escape from heavy leafhopper infestation. Nasruddin at al.: Potential, abundance, and distribution of E. terminalis tanam dengan penyemprotan insektisida sekali seminggu. Plot yang lain tidak disemprot, sehingga secara bebas terinfestasi oleh wereng daun. Fluktuasi populasi serangga dewasa dimonitor dengan menggunakan jaring serangga, sedangkan populasi nimfa dihitung langsung pada daun. Penyebaran wereng disurvei sejak 2009 hingga 2013 di sentra pertanaman kedelai di Sulawesi Selatan. Hasil penelitian menunjukkan bahwa E. terminalis menyebabkan kehilangan hasil sebesar 26% pada tanaman rentan tanpa penggunaan insektisida. Infestasi pertama wereng terjadi dua minggu setelah tanaman berkecambah pada pertanaman awal dan akhir musim kemarau. Terdapat korelasi negatif antara curah hujan dan jumlah wereng. E. terminalis ditemukan pada semua sentra pertanaman kedelai di Sulawesi Selatan. Dengan demikian, hasil penelitian ini mempertegas status E. terminalis sebagai hama penting pada tanaman kedelai dan telah menyebar luas pada pertanaman kedelai di Sulawesi Selatan. Di samping itu, tanaman kedelai yang ditanam pada awal musim kemarau dapat terhindar dari serangan wereng yang berat.Kata kunci: hama kedelai, fluktuasi populasi, kerusakan tanaman

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Section: Discussionmentioning

confidence: 99%

Section: Seasonal Abundance Of E Terminalismentioning

confidence: 99%

Potential damages, seasonal abundance and distribution of Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean in South Sulawesi

et al. 2015

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“…To construct a voucher collection, sweep net samples (100/ field) (Munyaneza et al 2008;Pantoja et al 1995) were taken bi-weekly along potato field margins in the four major potato production areas of Alaska (Benz et al 2007 Sweep net samples were not taken directly from potato foliage due to grower concerns about crop damage and possible mechanical spread of plant pathogens in small plantings (<1 ha). Sweep samples were collected from untreated potato plants in fields over 2 ha.…”

Section: Methodsmentioning

confidence: 99%

“…Diseases caused by phytoplasmas have become increasingly important in the Pacific Northwest, with recent outbreaks of potato purple top disease in Washington and Oregon causing severe yield losses and reduction in tuber quality in potato (Crosslin et al 2005;Munyaneza et al 2006Munyaneza et al , 2007Munyaneza et al , 2008. In the Columbia Basin, the potato purple top disease is associated with the Columbia Basin purple top phytoplasma vectored by the beet leafhopper, Circulifer tenellus Baker (Lee et al 2004a;Crosslin et al 2005Crosslin et al , 2006Munyaneza et al , 2007; while in Mexico, and other potato producing areas of the USA, purple top is associated with aster leafhoppers in the genus Macrosteles (Hagel and Landis 1967;Hagel et al 1973;Bantari et al 1993;Goodwin et al 1999;Leyva et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Leafhoppers (Homoptera: Cicadellidae) Associated with Potatoes in Alaska: Species Composition, Seasonal Abundance, and Potential Phytoplasma Vectors

et al. 2008

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Leafhopper transmitted phytoplasma diseases are an emerging problem for potato and vegetable producers in the conterminous US. Due to its geographical isolation and climatic constraints, Alaska is considered relatively free of diseases and insect pests; therefore growers in the state are exploring the potential of producing seed potato for export. However, the biology of agricultural insect pests in the circumpolar region is lacking or poorly understood. Research conducted from 2004 to 2006 in the main potato (Solanum tuberosum L.) production areas of Alaska resulted in the identification of 41 leafhopper species associated with agricultural settings. Twenty species were identified from sweep net samples and adhesive cards in association with potato. Two species, Davisonia snowi (Dorst) and Macrosteles fascifrons (Stål), made up approximately 60% of the total number of individuals collected, representing 34 and 26%, respectively. Both species, M. fascifrons and D. snowi generally arrived in fields by late May to early June and numbers peaked by late June to July, but in all years M. fascifrons populations peaked earlier than D. snowi. Twenty-three percent of the specimens were immature or could not be identified. Three of the species collected [Balclutha punctata (Fabricius), M. fascifrons, and Scaphytopius acutus (Say)] are known vectors of phytoplasmas of potatoes and other agricultural crops or have the potential to cause mechanical damage to potatoes. This report represents the first extensive study of cicadellids from potatoes in Alaska.Resumen Las enfermedades causadas por fitoplasmas trasmitidas por saltahojas son un problema emergente para los productores de hortalizas en los Estados Unidos de América. Debido a su ubicación geográfica y restricciones climáticas, Alaska es considerada relativamente libre de plagas; por tal razón los productores de papa en el estado exploran la posibilidad de producir semilla de papa para exportación. Sin embargo, la biología de las plagas agrícolas en las zonas circumpolares es poco conocida o inexistente. Investigación realizada de 2004 al 2006 en las áreas de mayor producción de papa (Solanum tuberosum L.) en Alaska resultó en la identificación de 41 especies de saltahojas asociadas a sistemas agrícolas. Veinte especies fueron identificadas de muestras capturadas con red entomológica y trampas adhesivas en asociación al cultivo de la papa. Dos especies, Davisonia snowi (Dorst) y Macrosteles fascifrons (Stål) constituyeron aproximadamente el 60% del total de especimenes capturadas, representando el 34 y 26%, respectivamente. Ambas especies, M. fascifrons y D. snowi, generalmente aparecieron en los campos a final de Mayo o inicio de Junio y alcanzaron su mayor número a final de Junio o inicio de Julio, pero en todos los años las poblaciones de M. fascifrons alcanzaron su punto máximo antes que D. snowi. Veintitrés por ciento de los especimenes fueron insectos inmaduros o no pudieron ser identificados. Tres de las especies recolectadas [Balclutha punctata (Fabricius), M. fa...

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“…Hoppers were captured weekly by 100 sweeps in 360-cm 2 plot for each sampling with a 30-cm net hoop (Munyaneza et al 2008) from the early growth stage to flowering stage in a toria field during October 2009 from 1700 to 1900 hours. The samples were collected in plastic bags and brought to the laboratory.…”

Section: Identification Of Potential Insect Vectormentioning

confidence: 99%

Transmission and detection of toria [Brassica rapa L. subsp. dichotoma (Roxb.)] phyllody phytoplasma and identification of a potential vector

Azadvar

Yadava

2011

J Gen Plant Pathol

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Phyllody disease associated with 16SrIX phytoplasma was observed in the range of 4.1-11% in 10 different lines of toria [Brassica rapa L. subsp. dichotoma (Roxb.)] in experimental fields of the Indian Agricultural Research Institute, New Delhi, India during 2008 and 2009.The toria phyllody (TP) phytoplasma was detected in all the symptomatic and 13.3% of asymptomatic toria plants by nested PCR. The phytoplasma was detected in midrib, flower part, siliquae, stem, and root of infected plants as well as seeds. TP was transmitted by grafting and by dodder to toria and nine other rapeseed/mustard species as confirmed by nested PCR. However, symptoms of phytoplasma infection were induced only in toria, yellow sarson [Brassica rapa L. subsp. trilocularis (Roxb.)], brown sarson [Brassica rapa L. subsp. sarson (Prain)], rapeseed (B. napus subsp. oleifera), and rocket or taramira (Eruca sativa) but not in mustard (B. juncea), black mustard (B. nigra), Ethiopian mustard (B. carinata), B. tournefortii and white mustard (Sinapis alba). Transmission of TP phytoplasma to periwinkle (Catharanthus roseus) was successful only through dodder, but no transmission to tomato (Lycopersicon esculentum) or brinjal (Solanum melongena) was found. TP phytoplasma was detected in Laodelpax striatellus, an abundant planthopper in toria fields, which indicates that this planthopper may be a potential vector for TP phytoplasma.

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Seasonal Occurrence and Abundance of Beet Leafhopper in the Potato Growing Region of Washington and Oregon Columbia Basin and Yakima Valley

Cited by 25 publications

References 27 publications

Potential damages, seasonal abundance and distribution of Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean in South Sulawesi

Potential damages, seasonal abundance and distribution of Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean in South Sulawesi

Leafhoppers (Homoptera: Cicadellidae) Associated with Potatoes in Alaska: Species Composition, Seasonal Abundance, and Potential Phytoplasma Vectors

Transmission and detection of toria [Brassica rapa L. subsp. dichotoma (Roxb.)] phyllody phytoplasma and identification of a potential vector

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