Evaluaci\uf3n de la preferencia de la mosca blanca Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) en cinco cultivos agr\uedcolas

Morales P, Cermeli M. 2001. Evaluation of the preference of the sweet potato whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in five agricultural crops. Entomotropica 16(2):73-78. The sweet potato whitefly, Bemisia tabaci (Gennadius, 1889)(Hemiptera: Aleyrodidae) has caused severe damage in many crops worldwide. Due to the large list of susceptible plants, it is important to evaluate its preference for oviposition and nymphal development in crop plants. In this study observations were performed in a greenhouse on sesame ( Sesamum indicum L.), field beans ( Phaseolus vulgaris L.), cucumber ( Cucumis pepo L.), cantaloupe ( Cucumis melo L.) and tomato ( Lycopersicon esculentum Mill.), in a randomized block design with five treatments (crop) and four repetitions. The numbers of eggs and live and death nymphs per cm2 on the underside of the leaves in up to 14 leaves per plant, were counted four times. The higest number of eggs and live nymphs per cm2 were observed in tomato with 12.967 and 6.125 respectively, being statistically different from field beans (0.950 egg/cm2 and 0.869 nymphs/cm2) and cucumber (4.389 eggs/cm2 and 3.480 nymphs/cm2). The order of preference for oviposition and nymphal development was tomato>melon = sesame < cucumber = beans.Morales P, Cermeli M. 2001. Evaluaci\uf3n de la preferencia de la mosca blanca Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) en cinco cultivos agr\uedcolas. Entomotropica 16(2):73-78. La mosca blanca Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae), ha causado estragos en la producci\uf3n de rubros agr\uedcolas a nivel mundial. Debido a la gran cantidad de hospederos que presenta el insecto en Venezuela, se evalu\uf3 la preferencia para oviposici\uf3n y desarrollo ninfal del insecto en los cultivos de ajonjol\ued ( Sesamum indicum L.), caraota ( Phaseolus vulgaris L.), pepino ( Cucumis pepo L.), mel\uf3n ( Cucumis melo L.) y tomate ( Lycopersicon esculentum Mill.), utilizando un dise\uf1o en bloques al azar, con cinco tratamientos (cultivos) y cuatro repeticiones, en umbr\ue1culo. Se evaluaron las densidades poblacionales de huevos, ninfas vivas y muertas por cm2 en el env\ue9s de hasta 14 hojas por cada cultivo, por medio de troquel de 1,8 cm de di\ue1metro, en cuatro muestreos. Los mayores promedios de huevos (h) y ninfas vivas (nv) los present\uf3 el cultivo de tomate, con 12,967 y 6,125, respectivamente, diferenci\ue1ndose estad\uedsticamente de los cultivos de caraota (0,950 h/cm2 y 0,869 nv/cm2) y pepino (4,339 h/cm2 y 3,480 nv/cm2). El orden de preferencia en los cultivos evaluados fue tomate > mel\uf3n = ajonjol\ued > pepino = caraota

Presence of Pseudacysta perseae (Heidemann, 1908) (Insecta: Hemiptera: Tingidae) in Venezuela

Pseudacysta perseae (Heidemann) (Hemiptera: Tingidae) is reported for the first time affecting avocado ( Persea americana Mill.) in Venezuela. The damages to the plants are described.Se cita por primera vez al insecto Pseudacysta perseae (Heidemann) (Hemiptera: Tingidae), como plaga potencial del aguacatero ( Persea americana Mill.) en Venezuela. Adem\ue1s, se considera como el primer registro de la especie afectando este cultivo en el pa\ueds. Se describen los da\uf1os

Ciclo biol\uf3gico del minador de la hoja de los c\uedtricos Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) en naranja ( Citrus sinensis (L.) Osbeck)

S\ue1nchez J, Cermeli M, Morales P. 2002. Life cycle of the citrus leafminer Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) on sweet orange ( Citrus sinensis (L.) Osbeck). Entomotropica 17(2):167-172. The life cycle of the citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) is described on sweet orange (Citrus sinensis (L.) Osbeck) in greenhouse, complemented with observations on the behavior of life stages. The life cycle was completed in 14.25 \ub1 1.29 days (13 - 15.5) at 27.67 \ub0C and 61% relative humidity. The average in days for each stage was 2.35 \ub0 0.32 for the eggs, 4.25 \ub1 0.23 for the larvae, 1.03 \ub1 0.13 for the prepupa and 6.58 \ub1 0.61 for pupal development. Three larval instars stages were recorded with a duration of 1.11 \ub1 0.15; 1.12 \ub1 0.10 and 2.02 \ub1 0.14 days respectively. The observed lifespan of adults was a minimum of four and a maximum of 21 days.S\ue1nchez J, Cermeli M, Morales P. 2002. Ciclo biol\uf3gico del minador de la hoja de los c\uedtricos Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) en naranja ( Citrus sinensis (L.) Osbeck). Entomotropica 17(2):167-172. En el presente trabajo se describe el ciclo biol\uf3gico del minador de la hoja de los c\uedtricos Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) en naranja valencia (Citrus sinensis (L.) Osbeck), en condiciones de invernadero, complement\ue1ndolo con observaciones sobre el comportamiento de los diferentes estad\uedos. El tiempo para completar el ciclo a una temperatura promedio de 27,67 \ub0C y 61% de humedad relativa fue de 14,25 \ub1 1,29 d\uedas (rango 13 - 15,5 d\uedas). El promedio de desarrollo en d\uedas para cada fase fue de 2,35 \ub1 0,32 para incubaci\uf3n de huevos, 4,25 \ub1 0,23 para desarrollo larval, 1,03 \ub1 0,13 para la prepupa y 6,58 \ub1 0,61 para la pupa. Se determinaron tres instares larvales con duraci\uf3n de 1,11 \ub1 0,15; 1,12 \ub1 0,10 y 2,02 \ub1 0,14 d\uedas respectivamente. El tiempo de vida de los adultos fluctu\uf3 entre un m\uednimo de cuatro hasta un m\ue1ximo de 21 d\uedas

Primera cita de Trigonotylus tenuis Reuter, 1893 (Hemiptera: Miridae) causando da\uf1os en el cultivo del arroz ( Oryza sativa L.) en Venezuela

Trigonotylus tenuis Reuter is reported for the first time causing damage in rice fields in the states of Portuguesa and Gu\ue1rico, Venezuela. A short description of the insect and damage caused to the plant are given.Se cita por primera vez la presencia de Trigonotylus tenuis Reuter causando da\uf1o en el cultivo del arroz en los estados Gu\ue1rico y Portuguesa. Se caracteriza el insecto y los da\uf1os causados al cultivo

Lista de hospederos de la mosca del Mediterr\ue1neo Ceratitis capitata Wiedemann (Diptera: Tephritidae) basada en los registros del Museo de Insectos de Inter\ue9s Agr\uedcola del INIA - CENIAP

MORALES P, CERMELI M, GODOY F, SALAS B. 2004. A list of Mediterranean fruit fly Ceratitis capitata Wiedemann (Diptera: Tephritidae) host plants based on the records of INIA-CENIAP Museum of Insects of Agricultural Interest. Entomotropica 19(1):51-54. A list of host plants of Mediterranean fruit fly Ceratitis capitata (Diptera: Tephritidae) based on the records of the INIA-CENIAP Museum is given: Spondias mombin L., Mango, Mangifera indica L., Anacardium occidentale L.(Anacardiaceae); Annona muricata L. (Annonaceae); Chrysobalanus icaco L. (Chrysobalanaceae); Terminalia catappa L. (Combretaceae); Avocado, Persea americana Mill. (Lauraceae); Malphigia glabra L. (Malphigiaceae); Fig Ficus carica L. (Moraceae); Guajava, Psidium guajava L., Syzigium malasense (L.) Merr. & Perry., Syzigium jambos (L.) Alston. (Myrtaceae); Carambola fruit, Averrhoa carambola L. (Oxalidaceae); Coccoloba uvifera (L.) Jacq. (Polygonaceae); Peach, Prunus persica L., Eriobotrya japonica Lindl. Pear, Pyrus communis L., Apple Pyrus malus L. (Rosaceae); Coffee, Coffea arabica L. (Rubiaceae); Grapefruit, Citrus paradisi Macf., Citrus reticulatus Blanco, orange Citrus aurantium L. (Rutaceae); Pouteria campechiana (HBK) Baehni, Achras sapota L. (Sapotaceae). The records are from the following states: Aragua, Carabobo, Dtto. Federal (actually Vargas State), Miranda, Monagas, Nueva Esparta and Zulia.MORALES P, CERMELI M, GODOY F, SALAS B. 2004. Lista de hospederos de la mosca del Mediterr\ue1neo Ceratitis capitata Wiedemann (Diptera: Tephritidae) basada en los registros del Museo de Insectos de Inter\ue9s Agr\uedcola del INIA -CENIAP. Entomotropica 19(1):51-54. Los registros corresponden a los estados Aragua, Carabobo, Dtto. Federal (hoy estado Vargas), Miranda, Monagas, Nueva Esparta y Zulia, en los siguientes hospederos: Jobo, Spondias mombin L., Mango, Mangifera indica L., Merey, Anacardium occidentale L.(Anacardiaceae); Guan\ue1bana, Annona muricata L. (Annonaceae); Icaco, Chrysobalanus icaco L. (Chrysobalanaceae); Almendr\uf3n, Terminalia catappa L. (Combretaceae); Aguacate, Persea americana Mill. (Lauraceae); Semeruco, Malphigia glabra L. (Malphigiaceae); Higo Ficus carica L. (Moraceae); Guayaba, Psidium guajava L., Pomag\ue1s, Syzigium malasense (L.) Merr. & Perry., Pomarrosa, Syzigium jambos (L.) Alston. (Myrtaceae); Tamarindo culi , Averrhoa carambola L. (Oxalidaceae); Uva de playa, Coccoloba uvifera (L.) Jacq. (Polygonaceae); Durazno, Prunus persica L., N\uedspero del jap\uf3n, Eriobotrya japonica Lindl. Pera, Pyrus communis L., ManzanaPyrus malus L. (Rosaceae); Caf\ue9, Coffea arabica L. (Rubiaceae); Grapefruit, Citrus paradisi Macf., Mandarina, Citrus reticulatus Blanco, Naranja, Citrus aurantium L. (Rutaceae); Canistel, Pouteria campechiana (HBK) Baehni, N\uedspero, Achras sapota L. (Sapotaceae)

Diversity and origin of venezuelan aphidofauna (Hemiptera: Aphidoidea)

The present paper updates Cermeli’s 1990 list of Venezuelan aphid fauna, we emphasize on the origin and world distribution of the species. Ninetyfour species and 60 genera are reported in the three families of the Superfamily Aphidoidea. Adelgidae and Phylloxeridae is each represented by one species, the rest of the species belong to the Aphididae. Of the twenty recognized subfamilies of Aphididae, eigth are present: Aphidinae, Chaitophorinae, Hormaphidinae, Lachninae, Lizeriinae, Myzocallidinae, Neophyllaphidinae and Pemphiginae. More than 80% of the species and 73% of the genera belong to the Subfamily Aphidinae. The majority of the species present in Venezuela are cosmopolitan or originary of other regions, distributed as follows: 24 from the Neartic (25,53%), 18 from Paleartic (19,25 %), 10 from Holartic (10,64 %), 16 Oriental (17,02 %), four from Ethiopic (4,26 %). Only 12 species (12,26 %) are Neotropical, and of those only four species (4,26 %) are endemic or were described from Venezuela

Fluctuation and identification of aphids at three potato (Solanum tuberosum L.) producing localities in Monagas State, between 1987 and 1990

Carrera A, Cermeli M. 2001. Fluctuation and identification of aphids at three potato (Solanum tuberosum   L.) producing localities in Monagas State, between 1987 and 1999. Entomotropica 16(2):67-72. Aphids are vectors of viruses desqualifying potato tuber, grown for seed. In order to avoid virus incidence it is necessary to know the species present and alate dynamics in potato seed producing areas. In order to know alate fluctuation and aphid species present in three locations in the State of Monagas, yellow water traps (painted Lemon Yellow F65YV29 Kem Lustral Sherwin Williams®), were used at the potato field borders 40 cm above ground. Evaluations were performed during the dry season from 1987 to 1990. At San Agustin (1 100 meters above sea level) 33 species were collected, at Caripe (800 masl), 25 species and at Guanaguana (400 masl) 34 species. The most common alates present were Aphis citricola   , Aphis amaranthi   , Myzus persicae   and Lypaphis erysimi. The highest incidence coincided with flowering period of the crop. Differences in number of species were found among the localities

Evaluation of the preference of the sweet potato whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in five agricultural crops

Morales P, Cermeli M. 2001. Evaluation of the preference of the sweet potato whitefly Bemisia tabaci   (Gennadius) (Hemiptera: Aleyrodidae) in five agricultural crops. Entomotropica 16(2):73-78. The sweet potato whitefly, Bemisia tabaci (Gennadius, 1889)(Hemiptera: Aleyrodidae) has caused severe damage in many crops worldwide. Due to the large list of susceptible plants, it is important to evaluate its preference for oviposition and nymphal development in crop plants. In this study observations were performed in a greenhouse on sesame (Sesamum indicum   L.), field beans (Phaseolus vulgaris   L.), cucumber (Cucumis pepo   L.), cantaloupe (Cucumis melo   L.) and tomato (Lycopersicon esculentum   Mill.), in a randomized block design with five treatments (crop) and four repetitions. The numbers of eggs and live and death nymphs per cm2 on the underside of the leaves in up to 14 leaves per plant, were counted four times. The higest number of eggs and live nymphs per cm2 were observed in tomato with 12.967 and 6.125 respectively, being statistically different from field beans (0.950 egg/cm2 and 0.869 nymphs/cm2) and cucumber (4.389 eggs/cm2 and 3.480 nymphs/cm2). The order of preference for oviposition and nymphal development was tomato>melon = sesame < cucumber = beans