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E Rodrigo - One of the best experts on this subject based on the ideXlab platform.

  • umbrales de tratamiento para aonidiella aurantii parlatoria pergandii y Lepidosaphes beckii homoptera diaspididae en citricos
    Phytoma España: La revista profesional de sanidad vegetal, 2004
    Co-Authors: J M Rodriguez, E Rodrigo, Ferran Garcia Mari, Pilar Hernandez Penades
    Abstract:

    En los diaspididos de citricos AonidieIIa auranti~ Par/atona pergandiiy Lepidosaphes beckii (Homoptera: Diaspididae) se han propuesto diversos metodos de muestreo y umbrales, como la observacion de hojas y brotes, la observacion de los frutos en crecimiento, el seguimiento del vuelo de machos con trampas de feromonas sexuales, o la infestacion de los frutos en la cosecha del ano anterior. En general en los metodos propuestos se resalta la importancia de la observacion de los niveles de parasitismo. Se describen los metodos de muestreo y los umbrales empleados en diversos paises como Italia, California, Sudafrica, Australia y Espana. Hemos estudiado en nuestro pais la aplicacion del seguimiento del vuelo de machos, en particular en A. aurantii con feromonas, observandose una aceptable correlacion entrealgunos vuelos y la infestacion posterior de los frutos en la cosecha. El proceso de invasion de los frutos en crecimiento tiene lugar desde la primavera hasta el otono, con diferencias entre las especies. Por ultimo, se calcula y propone un umbral economico de tratamiento en base a la infestacion de los frutos en la cosecha del ano anterior.

  • Parasitoeds (Hym.: Aphelinidae) of three scale insects (Hom.: Diaspididae) in a citrus grove in valencia, spain
    Entomophaga, 1996
    Co-Authors: E Rodrigo, P Troncho, F. García-marí
    Abstract:

    Les parasitoÏdes d’Aonidiella aurantii (Maskell), Lepidosaphes beckii (Newman) et Parlatoria pergandii Comstock, ont été étudiés dans un verger d’orangers de la variété Navel à Valence, Espagne, pendant trois années. Sur des pièges jaunes englués, on a identifié quatre espèces d’Aphytis: Aphytis chrysomphali (Mercet), Aphytis melinus DeBach, Aphytis Lepidosaphes Compere et Aphytis thispanicus (Mercet). On n’a pas observé un modèle de vol annuel évident chez les adultes. Aphytis melinus , introduit dans le verger quelques années auparavant, a été retrouvé en très petit nombre et n’a pas semblé provoquer l’augmentation ou le déplacement d’Aphytis chrysomphali comme parasitoÏde d’Aonidiella aurantii. Dans les échantillonnages réalisés à intervalles réguliers sur les feuilles, branches et fruits, les femelles des trois espèces de cochenilles ont montré un taux annuel moyen de parasitisme actif entre 3, 5 et 8 %. Les mâles de Parlatoria pergandii n’ont pas été parasités, le parasitisme de Lepidosaphes beckii a été beaucoup plus faible chez les mâles que chez les femelles des cochenilles, et chez Aonidiella aurantii il a été plus élevé chez les mâles. Les cochenilles des trois espèces ont été moins parasitées sur les branches que sur les feuilles et aussi moins sur les fruits chez Lepidosaphes beckii. La tendance annuelle du parasitisme par Aphytis a fluctué sans modèle défini. Le parasitisme par Encarsia inquirenda (Silvestri), un endoparasitoÏde de Parlatoria pergandii , a été plus stable au cours de l’année et a augmenté progressivement chaque année. The parasitoids of Aonidiella aurantii (Maskell), Lepidosaphes beckii (Newman) and Parlatoria pergandii Comstock were studied in a Navel orange grove in Valencia, Spain during three years. Four species of Aphytis were identified on yellow sticky traps, Aphytis chrysomphali (Mercet), Aphytis melinus Debach , Aphytis Lepidosaphes Compere and Aphytis hispanicus (Mercet). No consistent annual pattern was observed in the flight of adults. A. melinus , introduced some years earlier in the grove, was found in very low numbers and showed no signs of increasing and displacing A. chrysomphali as a parasitoid of A. aurantii . On female scales of the three species sampled at regular intervals from leaves, twigs and fruit, the mean annual rate of active parasitism was similar and ranged from 3.5% to 8%. P. pergandii males were not parasitized, in L. beckii parasitism was usually much lower in male than in female scales, and in A. aurantii it was higher in the males. Scales of the three species were less parasitized on twigs than on leaves, and so were L. beckii on fruit. The annual trend of parasitism by Aphytis on scales fluctuated without a definite pattern. Parasitism by Encarsia inquirenda (Silvestri), an endoparasitoid of P. pergandii , was more stable throughout the year and increased steadily from year to year.

  • Parasitoeds (Hym.: Aphelinidae) of three scale insects (Hom.: Diaspididae) in a citrus grove in valencia, spain
    Entomophaga, 1996
    Co-Authors: E Rodrigo, P Troncho, Ferran Garcia-marí
    Abstract:

    The parasitoids ofAonidiella aurantii (Maskell),Lepidosaphes beckii (Newman) andParlatoria pergandii Comstock were studied in a Navel orange grove in Valencia, Spain during three years. Four species ofAphytis were identified on yellow sticky traps,Aphytis chrysomphali (Mercet),Aphytis melinus Debach,Aphytis Lepidosaphes Compere andAphytis hispanicus (Mercet). No consistent annual pattern was observed in the flight of adults.A. melinus, introduced some years earlier in the grove, was found in very low numbers and showed no signs of increasing and displacingA. chrysomphali as a parasitoid ofA. aurantii. On female scales of the three species sampled at regular intervals from leaves, twigs and fruit, the mean annual rate of active parasitism was similar and ranged from 3.5% to 8%.P. pergandii males were not parasitized, inL. beckii parasitism was usually much lower in male than in female scales, and inA. aurantii it was higher in the males. Scales of the three species were less parasitized on twigs than on leaves, and so wereL. beckii on fruit. The annual trend of parasitism byAphytis on scales fluctuated without a definite pattern. Parasitism byEncarsia inquirenda (Silvestri), an endoparasitoid ofP. pergandii, was more stable throughout the year and increased steadily from year to year.

  • observaciones sobre el parasitismo en los diaspinos aonidiella aurantii maskell Lepidosaphes beckii newman y parlatoria pergandei comstock en una parcela de naranjo
    Boletín de sanidad vegetal. Plagas, 1992
    Co-Authors: E Rodrigo, P Troncho, Fernando Garcia Mari
    Abstract:

    TRONCHO. P.; RODRIGO, E.; GARCIA-MARI, F. (1992): Observaciones sobre el parasitismo en los diaspinos Aonidiella aurantii (Maskell), Lepidosaphes beckii (Newman) y Parlatoria pergandei (Comstock) en una parcela de naranjo. Bol. San. Veg. Plagas, 18(1): 11-30. The parasitism by Hymenoptera of the genus Aphytis on three diaspidid scales, Lepidosaphes beckii (Newman), Parlatoria pergandei (Comstock) and Aonidiella aurantii (Maskell) has been studied in a Washington Navel orange orchard from El Puig (Valencia, Spain). Insect hosts from branches, leaves and fruits, and also parasites from yellow sticky traps, have been sampled regularly in 1988 and 1990. A total of 1.300 specimens of Aphytis have been identified from the yellow traps, included in 4 species: Aphytis hispanicus (Mercet), parasite of P. pergandei, Aphytis Lepidosaphes Compere, parasite of L. beckii, and Aphytis melinus DeBach and Aphytis chrysomphali (Mercet), parasites of A. aurantii. A. hispanicus and A. Lepidosaphes keep a variable flight along the vegetative period, between March and November. A. chrysomphali shows two maximums of flight, at the end of winter (before than the other species) and in Autum. Only 11 specimens of A. melinus have been captured, most of them in Summer. In P. pergandei and L. beckii almost only females are parasitized, while in A. aurantii parasitism in similar in both sexes. Hosts on branches are less parasitized than on leaves. The active parasitism oscillates during the year in P. pergandei and L. beckii in similar values in the two years of sampling, reaching its peak in Summer 1988 and Autumn 1990 with values of up to 20 %. The parasitism on A. aurantii shows three year maximums, in March, June and September. The relative importance of these maximums differs between males and females of the host.

A Barakat - One of the best experts on this subject based on the ideXlab platform.

  • Comparative efficacy of some insecticides against purple scale insect, Lepidosaphes beckii (Hemiptera: Coccoidea) and its parasitoid in citrus orchard in Egypt.
    Egyptian Academic Journal of Biological Sciences. A Entomology, 2012
    Co-Authors: Y Dewer, S Abdel-razak, A Barakat
    Abstract:

    Five insecticide compounds Azadirachtin (Nimbecidine ® ); Pyriproxyfen (Admiral ® ); Acetamiprid (Mospilan ® ); Emamectin benzoate (Proclaim ® ) and summer mineral oil (star oil ® ) and their mixtures were evaluated for controlling the purple scale insect, Lepidosaphes beckii (Newman) (Hemiptera: Diaspididae) as well as its parasitoid Aphytis Lepidosaphes Compere (Hymenoptera: Aphelinidae) on growing citrus orchard, Citrus sinensis L. (Rutacea). This work has been carried out in the experimental farm of faculty of agriculture, Sabahia, Alexandria, Egypt, during two successive seasons 2009 and 2010. The obtained results revealed that star oil ® in combination with Admiral ® and Nimbecidine ® have given the highest reduction (%) values for L. beckii and its parasitoid, A. Lepidosaphes during the two experimentally years. In 2009, the calculated reduction % values for L. beckii and A. Lepidosaphes were (99.78 and 99.50%) and (96.75 and 97.29%), whereas in 2010 were (99.73 and 99.34%) and (94.40 and 96.46%) for the two combinations, respectively. On the other hand (Mospilan ® ) and (Proclaim ®) show less reduction percentages to the parasitoid during the two successive years. Whereas in 2009 were 54.56 and 73.19 %, in 2010 were 43.47 and 71.25 %, respectively.

Ferran Garcia-marí - One of the best experts on this subject based on the ideXlab platform.

  • Colonization of growing fruit by the armored scales Lepidosaphes beckii, Parlatoria pergandii and Aonidiella aurantii (Hom., Diaspididae)
    Journal of Applied Entomology, 2004
    Co-Authors: Ma E. Rodrigo, Ferran Garcia-marí, J. M. Rodríguez‐reina, T. Olmeda
    Abstract:

    :  The process of invasion of the fruit surface by three species of armored scale insects [Lepidosaphes beckii (Newman), Parlatoria pergandii Comstock and Aonidiella aurantii (Maskell)], was studied in citrus orchards in Valencia, Spain. Three periods of intense crawler migration were detected annually for L. beckii and P. pergandii. Abundance of crawlers increased throughout the year and they moved outwards in the tree canopy. The fruit was continuously invaded during the period of fruit growth, starting at a very early stage of fruit development, by crawlers of the first generation of all the three species. Differences in fruit invasion and settling behaviour were found between the three species. First-generation crawlers tended to settle under the fruit calyx in L. beckii and P. pergandii, and on the exposed fruit surface in A. aurantii. During the second generation, most A. aurantii scales originated from reproducing females already settled on the fruit, whereas in L. beckii and P. pergandii new scales came preferentially from other tree substrates or from females settled under the fruit calyx. These findings suggest changes to optimize the timing of chemical sprays for controlling the scales.

  • Parasitoeds (Hym.: Aphelinidae) of three scale insects (Hom.: Diaspididae) in a citrus grove in valencia, spain
    Entomophaga, 1996
    Co-Authors: E Rodrigo, P Troncho, Ferran Garcia-marí
    Abstract:

    The parasitoids ofAonidiella aurantii (Maskell),Lepidosaphes beckii (Newman) andParlatoria pergandii Comstock were studied in a Navel orange grove in Valencia, Spain during three years. Four species ofAphytis were identified on yellow sticky traps,Aphytis chrysomphali (Mercet),Aphytis melinus Debach,Aphytis Lepidosaphes Compere andAphytis hispanicus (Mercet). No consistent annual pattern was observed in the flight of adults.A. melinus, introduced some years earlier in the grove, was found in very low numbers and showed no signs of increasing and displacingA. chrysomphali as a parasitoid ofA. aurantii. On female scales of the three species sampled at regular intervals from leaves, twigs and fruit, the mean annual rate of active parasitism was similar and ranged from 3.5% to 8%.P. pergandii males were not parasitized, inL. beckii parasitism was usually much lower in male than in female scales, and inA. aurantii it was higher in the males. Scales of the three species were less parasitized on twigs than on leaves, and so wereL. beckii on fruit. The annual trend of parasitism byAphytis on scales fluctuated without a definite pattern. Parasitism byEncarsia inquirenda (Silvestri), an endoparasitoid ofP. pergandii, was more stable throughout the year and increased steadily from year to year.

Alviantono Redy - One of the best experts on this subject based on the ideXlab platform.

  • Keragaman Serangga Musuh Alami Kutu Sisik Lepidosaphes beckii Pada Tanaman Jeruk Keprok (Citrus Nobilis) Dan Jeruk Manis (Citrus Sinensis)
    2013
    Co-Authors: Alviantono Redy
    Abstract:

    Serangan hama dapat menurunkan nilai ekonomi jeruk. Salah satu hama penting yang menyerang jeruk adalah kutu sisik Lepidosaphes beckii. Tujuan dari penelitian ini untuk mengetahui jenis dan keanekaragaman serangga musuh alami yang berasosiasi dengan kutu sisik Lepidosaphes beckii pada tanaman jeruk keprok dan jeruk manis. Penelitian dilakukan dengan cara pengamatan langsung, pengambilan sampel dan identifikasi. Data dianalisis untuk menentukan nilai indeks keanekaragaman, indeks kesamaan (IBC) dan indeks dominansi. Serangga musuh alami yang ditemukan meliputi kelompok predator Famili Coccinellidae (Chilocorus, Symnus dan Harmonia) dan Formicidae, serta kelompok parasitoid Famili Trichogrammatidae (Trichogramma) dan Aphelinidae (Aphytis dan Encarsia). Nilai IBC untuk kedua komunitas adalah 0,93. Nilai tersebut menunjukkan bahwa secara umum kerapatan semua jenis serangga musuh alami kutu sisik pada kedua komunitas adalah sama. Berdasarkan nilai indeks Shannon-Wiener, keanekaragaman jenis serangga musuh alami pada kedua lokasi tergolong rendah dan tidak terdapat perbedaan pada kedua jenis jeruk (jeruk keprok 1,5387 dan jeruk manis 1,5542). Formicidae merupakan serangga yang paling banyak ditemukan di kedua lokasi. Kelimpahan Formicidae yang lebih tinggi daripada kelimpahan serangga lain disebabkan karena bersifat polifaga dan memiliki struktur sosial populasi yang terorganisasi dengan baik

Amin Setyo Leksono - One of the best experts on this subject based on the ideXlab platform.

  • keragaman serangga musuh alami kutu sisik Lepidosaphes beckii pada jeruk keprok dan jeruk manis
    Biotropika: Journal of Tropical Biology, 2013
    Co-Authors: Redy Alviantono, Amin Setyo Leksono
    Abstract:

    Serangan hama dapat menurunkan nilai ekonomi jeruk. Salah satu hama penting yang menyerang jeruk adalah kutu sisik Lepidosaphes beckii . Tujuan dari penelitian ini untuk mengetahui jenis dan keanekaragaman serangga musuh alami yang berasosiasi dengan kutu sisik Lepidosaphes beckii pada tanaman jeruk keprok dan jeruk manis. Penelitian dilakukan dengan cara pengamatan langsung, pengambilan sampel dan identifikasi. Data dianalisis untuk menentukan nilai indeks keanekaragaman, indeks kesamaan (IBC) dan indeks dominansi. Serangga musuh alami yang ditemukan meliputi kelompok predator Famili Coccinellidae ( Chilocorus , Symnus dan Harmonia ) dan Formicidae, serta kelompok parasitoid Famili Trichogrammatidae ( Trichogramma ) dan Aphelinidae ( Aphytis dan Encarsia ). Nilai IBC untuk kedua komunitas adalah 0,93. Nilai tersebut menunjukkan secara umum kerapatan semua jenis serangga musuh alami kutu sisik pada kedua komunitas adalah sama. Berdasarkan nilai indeks Shannon-Wiener, keanekaragaman jenis serangga musuh alami pada kedua lokasi tergolong rendah dan tidak terdapat perbedaan pada kedua jenis jeruk (jeruk keprok 1,5387 dan jeruk manis 1,5542). Formicidae merupakan serangga yang paling banyak ditemukan di kedua lokasi. Kelimpahan Formicidae yang lebih tinggi daripada kelimpahan serangga lain disebabkan karena bersifat polifaga dan memiliki struktur sosial populasi yang terorganisasi dengan baik. Kata Kunci : keanekaragaman, Lepidosaphes beckii , serangga musuh alami