Academic literature on the topic 'Empoasca decedens'

Amaç: Bu çalışma, Adana ilinde yetişen iki farklı Citrus spp. (cv. Washington Navel ve cv. Okitsu) Cicadellidae familyasına bağlı zararlı yaprakpiresi türleri ile yumurta parazitoidlerinin belirlenmesi amacı ile yürütülmüştür.Yöntem ve Bulgular: Bu çalışma, 2013-2014 yıllarında Adana ilinin Seyhan, Yüreğir ve Karataş ilçelerinde bulunan göbekli (Washington Navel) portakal ve mandarin (cv. Okitsu) çeşitlerinde yürütülmüştür. Yaprakpiresi türleri belirlemek için örneklemeler 5 bahçede yürütülmüştür. Örneklemelerde sarı yapışkan renk tuzağı ve D-Vac vakumlu böcek toplama aleti kullanılmıştır.Örneklemelerin yapıldığı bahçelerden alınan yaprak örnekleri kültüre alınarak yaprakpirelerinin yumurta parazitoitleri belirlenmiştir. Çalışma sonucunda Austrogallia sinuata (Mulsant Rey,1855), Asymmetrasca decedens (Paoli, 1932), Empoasca decipiens (Paoli, 1930), Zyginidia sohrab (Zachvatkin, 1947), Cicadulina bipunctella (Matsumura, 1908), Psammotettix striatus (Linnaeus, 1758), Balclutha hebe (Kirkady, 1906) olmak üzere Cicadellidae familyasına ait üç alt familya da toplam 7 tür tespit edilmiştir. Çalışmada örnekleme yapılan alanlarda toplanan türler içerisinde, Cicadulina bipunctella, Empoasca decipiens & Asymmetrasca decedens, Zyginidia sohrab örnekleme yapılan alanlarda en yoğun türler olarak tespit edilmiştir.Genel Yorum: Örnekleme yapılan alanlarda toplanan türler içerisinde, Cicadulina bipunctella, Empoasca decipiens & Asymmetrasca decedens, Zyginidia sohrab örnekleme yapılan alanlarda en yoğun türler olarak tespit edilmiştir. Buna ilave olarak Anagrus atomus (Hymenoptera, Mymaridae) Cicadellidae türlerinin yumurta parazitoidi olarak belirlenmiştir.Çalışmanın Önemi ve Etkisi: Yaprakpirelerine ait türler potansiyel virüs vektörleri olduğundan, bunların popülasyon dalgalanmaları yakından izlenmelidir.

During the years 2009-2010,&nbsp;effects of irrigation regimes and nine poplar clones on density of three sucking pests,&nbsp;<em>Empoasca decedens</em>&nbsp;Paoli,&nbsp;<em>Salicicola kermanensis</em>&nbsp;(Lindinger) and&nbsp;<em>Diaspidiotus slavoncus</em>&nbsp;(Green) were studied in Alborz Research Station of Karaj. This study was carried out under split plot design. 4, 8 and 12 days irrigation intervals were considered as main treatment by 3&nbsp;replications&nbsp;and nine poplar clones as secondary treatments. For sampling of&nbsp;<em>E. decedens</em>&nbsp;and&nbsp;<em>D. slavoncus,</em>&nbsp;separately&nbsp;four trees from each secondary plot and eight leaves from each tree were&nbsp;chosen, randomly. Then numbers of different nymph instar of&nbsp;<em>E. decedens</em>&nbsp;and the scales were enumerated. During&nbsp;<em>S. kermanensis</em>&nbsp;sampling, first four trees from each secondary plot then four branches from each tree were selected. Next the numbers of scales on 10 cm of each branch were counted. Finally,&nbsp;the numbers of each pest were calculated in surface unit. Obtained data analyzed by SAS software. The results showed irrigation regimes, poplar species and clones and interaction of them affected on the pests densities, significantly (&alpha;&lt; 0.05).&nbsp;The highest density of them was seen under 12 day irrigation regimes. The highest density of<em>E. decedens</em>&nbsp;was on&nbsp;<em>P. a.</em>&nbsp;44.9. The highest density of&nbsp;<em>S. kermanensis</em>&nbsp;was obtained on&nbsp;<em>P. n. 42.78&nbsp;</em>and&nbsp;<em>P. trichocarpa</em>. The highest density<em>&nbsp;</em>of&nbsp;<em>D. slavoncus</em>&nbsp;was on&nbsp;<em>P. n. 42.78</em>.&nbsp;The highest densities of&nbsp;<em>E.</em>&nbsp;<em>decedens</em>&nbsp;and&nbsp;<em>D. slavoncus</em>&nbsp;were&nbsp;observed<em>&nbsp;</em>on<em>P. a.</em>&nbsp;44.9 and&nbsp;<em>P. n. 42.78</em>&nbsp;in 12 days irrigation regimes, respectively<em>.</em>&nbsp;Also<em>,&nbsp;</em>the highest density of&nbsp;<em>S. kermanensis</em>&nbsp;was on&nbsp;<em>P. n. 42.78</em>&nbsp;and&nbsp;<em>P. trichocarpa</em>&nbsp;under 12 days. It seems irrigation could change the density of the pests on poplar.

Bu çalışma Mardin ili ikinci ürün mısırdaki yaprakpiresi türleri ile önemli türlerin popülasyon değişimlerinin izlenmesi amacıyla 2022-2023 yıllarında yürütülmüştür. Çalışmada ikinci ürün mısır alanlarında toplam 17 cicadellid türü belirlenmiş ve bunların Anaceratagallia ribauti (Ossiannilsson, 1938)), Agallia laevis (Ribaut, 1935), Aconurella prolixa (Lethierry,1885), Asymmetrasca decedens (Paoli, 1932), Austroagallia sinuata (Mulsant et Rey,1855), Balclutha punctata (Fabricius, 1977), Cicadulina bipunctella (Matsumura, 1908), Neoaliturus opacipennis (Lethierry, 1876), Doratura homophyla (Flor, 1871), Empoasca decipiens (Paoli, 1930), Mogangella straminea (Dlabola,1957), Euscelidus variegatus (Kirschbaum, 1858), Orosius orientalis (Matsumura, 1914), Paralimnus intricatus (Rey, 1981), Phlepsius intricatus (Hemich&amp;amp;Schaffer,1838), Psammotettix striatus (Linnaeus,1758) ve Zyginidia sohrab (Zachvatkin, 1947) olduğu kaydedilmiştir. En yaygın ve yoğun türün E. decipiens &amp;amp; A. decedens olduğu (2022 yılı %56, 2023 yılı %67) bu türleri Z. sohrab (2022 yılı %40, 2023 yılı %30) ve P. striatus’un takip ettiği belirlenmiştir. A.decedens &amp;amp; E. decipiens ile Z. sohrab’ın ikinci ürün mısırın fide döneminden itibaren görülmeye başladığı ve bitkilerin generatif dönem sonu ile olgunlaşma dönemi başında popülasyonlarının en üst seviyeye ulaştığı belirlenmiştir.

In this study, the population dynamics of cotton leafhoppers [Asymmetrasca decedens (Paoli) and Empoasca decipiens (Paoli)] in conventional cotton production areas of Hatay province were investigated using the sweep-net sampling method. In the Melekli district, while 68.75% of the 5.480 individuals collected in 2022 were in the generative stage, while this population reaches 5,803 individuals in 2023, this population is predominantly (63.53%) were concentrated in the vegetative period, but the peak of the population period (generative) remained the same. In the Reyhanlı district, the 6.762 individuals collected in 2022 showed a relatively similar distribution across the vegetative and generative stages of cotton (56% and 44%, respectively). In 2023, the number of individuals collected decreased by 36% (4.382), with the population predominantly concentrating in the vegetative stage (70.2%) compared to the previous year, while the peak period (vegetative) remained the same. In the Altınözü district, 13,470 individuals collected in 2022 showed more presence in the vegetative period (83%) and increased significantly to 25,490 in 2023 (83.2%), 63.8% of the population was concentrated in the vegetative period and the peak period of the population remained the same in both years (vegetative). These findings are important for the detection of A. decedens and E. decipiens presence and the implementation of appropriate pest management programs in cotton production areas.

AbstractWe identified females of six species of leafhoppers (tribe Empoascini), Asymmetrasca decedens (Paoli), Empoasca affinis Nast, E. decipiens Paoli, E. pteridis (Dahlbom), E. vitis Göthe, and Jacobiasca lybica (Bergevin and Zanon), using morphological characters of the ovipositor and isozyme and mitochondrial COI sequence analyses. Useful traits of the ovipositor are tooth morphology, length of the toothed area, form of sculpturing, and number and position of sensilla on the first and second pair of valves. Among the set of enzyme systems assayed, four putative loci, sod, hk-2, est-3, and est-2, together provided reliable diagnostic characters for single species, pairs of species, and groups of species. Analysis of mtCOI sequences revealed differences between the six species of Empoascini, and the neighbour-joining tree separated them into three distinct groups. Phenetic trees elaborated using Nei’s index and the Kimura two-parameter model clustered the six Empoascini species in similar groups.

Tese de mestrado, Ecologia e Gestão Ambiental, Universidade de Lisboa, Faculdade de Ciências, 2020<br>Asymmetrasca decedens (Paoli) é uma cigarrinha-verde considerada como praga em prunóideas, na região Mediterrânica, pelas lesões provocadas através da alimentação, podendo transmitir fitoplasmas. A resistência a alguns insecticidas é conhecida e a sua fenologia variável, dependendo o número de gerações anuais do clima regional. Em 2013, A. decedens foi detectada em pomares de pessegueiros da Beira Interior (Portugal), onde tem provocado danos nos últimos anos. Entre os inimigos do pessegueiro, encontra-se também Xylella fastidiosa Wells et al., bactéria fitopatogénica transmitida por insectos detectada recentemente em Portugal. Procurou-se conhecer a fenologia de A. decedens em pomares de pessegueiros da Beira Interior, avaliando o efeito das condições ambientais na sua abundância e discutindo possíveis medidas de gestão e caracterizar a comunidade de Auchenorrhyncha, identificando potenciais vectores de X. fastidiosa. Entre as 33 espécies de Auchenorrhyncha identificadas, Philaenus spumarius (Linnaeus), Cicadella viridis (Linnaeus) e Cercopis intermedia Kirschbaum são potenciais vectores de X. fastidiosa. Registou-se, pela primeira vez em Portugal Continental, a ocorrência de Sophonia orientalis (Matsumura), uma espécie invasora no Hawaii. As espécies dominantes e mais frequentes foram A. decedens (em maior densidade) e Empoasca solani (Curtis). Empoasca solani colonizou inicialmente os pomares, ocorrendo ao longo do período de amostragem, e atingiu o seu máximo populacional a 29 de Junho de 2018. Pouco depois, seguiu-se o aparecimento regular de A. decedens, que até 15 de Junho ocorreu pontualmente, concentrando-se 87% das capturas entre 3 de Agosto e 14 de Setembro, data em que atingiu o seu máximo populacional. A determinação das dinâmicas populacionais das cigarrinhas verdes permitiu confirmar a associação de A. decedens aos danos observados nos pessegueiros e identificar os períodos óptimos para a aplicação de insecticidas no controlo dos adultos. A presença de vectores competentes de X. fastidiosa confirma o risco de disseminação natural da bactéria nos pomares, caso se expanda para a região.<br>Asymmetrasca decedens (Paoli) is a polyphagous leafhopper, mainly distributed in Mediterranean region, where it is regarded as a pest of stone fruits, due to damage caused through feeding or its role as a vector of phytoplasma-associated diseases. In 2013, A. decedens was detected in Beira Interior (Portugal), causing damage in peach orchards. Being resistant to several pesticides, it is essential to understand A. decedens ecology and local population dynamics to develop adapted management measures. Peach trees are also susceptible hosts to Xylella fastidiosa Wells et al., an emergent phytopathogenic bacterium in Europe, recently detected in Portugal, which is naturally transmitted by xylem-feeding insects. The population dynamics of A. decedens in peach orchards of Beira Interior and the influence of some environmental factors were studied as well as the remaining Auchenorrhyncha community for the identification of potential vectors of X. fastidiosa. Three potential vectors of X. fastidiosa, Philaenus spumarius (Linnaeus), Cicadella viridis (Linnaeus) and Cercopis intermedia Kirschbaum were collected among 33 Auchenorrhyncha identified species. Sophonia orientalis (Matsumura), a known pest in Hawaii, was detected for the first time in mainland Portugal. Asymmetrasca decedens and Empoasca solani (Curtis) were the dominant and most frequent collected species. Empoasca solani was the first to colonize the orchards, but occurred throughout all sampling period, reaching its highest abundance on 29 June 2018. Asymmetrasca decedens started to occur regularly around 15 June, but 87% of collected individuals were captured between 3 August and 14 September, when the species reached a population peak. Analysis of green leafhoppers population dynamics confirmed the association of A. decedens to observed damage in peach trees and allowed the identification of the best periods for adult chemical control. The presence of two confirmed vectors of X. fastidiosa shows there is a real risk of natural disease spread, if the bacterium expands to the region.