scholarly journals New records of predation on eggs of Bemisia tabaci (Hemiptera: Aleyrodidae) by Chrysopodes (Chrysopodes) Lineafrons (Neuroptera: Chrysopidae) in northwestern Argentina

Intropica ◽  
2017 ◽  
Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani Aybar ◽  
Ana L. Ávila ◽  
Carmen Reguilón

Bemisia tabaci has become one of the major pests of economic importance that affects several crops worldwide. Among their natural enemies are found the Chrysopidae family, with larvae predators of different pests resulting very effective biological control agents. In order to contribute to possible use of this beneficial insect in B. tabaci biological control, the developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons was determined, as well as longevity and oviposition of the adults fed with eggs of B. tabaci. Chrysopodes (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration for each instars and survival of the larvae, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. The oviposition and longevity of the adults were recorded, both fed with the two preys. Chrysopodes (C.) lineafrons larvae consumed an average 127.04 (± 40.2) eggs of B. tabaci and 44 (± 19.04) eggs of S. cerealella per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 (± 3.54) days and 35 (± 5.04) days with S. cerealella eggs. Survival of immature stages, number of eggs per adults and their longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. Chrysopodes (C.) lineafrons has proved to be an efficient predator which would represent an excellent tool for B. tabaci biological control in tomato crops.

2016 ◽  
Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani ◽  
Ana L. Avila ◽  
Carmen Reguilon

Bemisia tabaci has become a major economic importance pest, affecting several crops worldwide. Among their natural enemies, species of Chrysopidae family, with larvae predators of different pests, are a very effective biological control agent. The developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons, and the longevity and oviposition of adults fed with eggs of B. tabaci was determined. C. (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration of each instar, and larvae survival, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. Oviposition and longevity of adults fed with the two preys were recorded. C. (C.) lineafrons larvae consumed an average of 127.04 B. tabaci eggs and 44 S. cerealella eggs per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 days; while for those fed with S. cerealella eggs it was 35 days. Immature stages survival, number of eggs per adults and longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. C. (C.) lineafrons proved to be an efficient predator, thus representing an excellent tool for the biological control of B. tabaci in tomato crops .


2016 ◽  
Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani ◽  
Ana L. Avila ◽  
Carmen Reguilon

Bemisia tabaci has become a major economic importance pest, affecting several crops worldwide. Among their natural enemies, species of Chrysopidae family, with larvae predators of different pests, are a very effective biological control agent. The developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons, and the longevity and oviposition of adults fed with eggs of B. tabaci was determined. C. (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration of each instar, and larvae survival, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. Oviposition and longevity of adults fed with the two preys were recorded. C. (C.) lineafrons larvae consumed an average of 127.04 B. tabaci eggs and 44 S. cerealella eggs per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 days; while for those fed with S. cerealella eggs it was 35 days. Immature stages survival, number of eggs per adults and longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. C. (C.) lineafrons proved to be an efficient predator, thus representing an excellent tool for the biological control of B. tabaci in tomato crops .


2001 ◽  
Vol 91 (5) ◽  
pp. 369-387 ◽  
Author(s):  
S. Schmidt ◽  
I.D. Naumann ◽  
P.J. De Barro

AbstractAfter the recent introduction of the pest whitefly Bemisia tabaci (Gennadius) biotype B into Australia, research was undertaken to study the parasitoids of the long established native B. tabaci and Trialeurodes vaporariorum (Westwood). The genus Encarsia species which are important biological control agents of whiteflies and hard scales. The taxonomy of the Encarsia species attacking B. tabaci and T. vaporariorum in Australia and the Pacific Islands is revised. DNA sequencing of the 28S D2 ribosomal DNA was used characterize species. Sixteen species are recognized, with 12 occurring in Australia, eight in the Pacific region, and four in both regions. All except one species (E. formosa Gahan) are new records for Australia. Four species are described as new from Australia: E. accenta & Naumann sp. n., E. adusta Schmidt & Naumann sp. n., E. oakeyensis Schmidt & Naumann sp. n., and E. ustulata Schmidt & Naumann sp. n. Diagnostic descriptions are given for all species and each species is illustrated. pictorial key is provided to allow the identification of species by non-specialists.


2021 ◽  
Vol 27 (1) ◽  
pp. 79-91
Author(s):  
Waheed Ali Panhwar ◽  
Kamran Ahmed Pathan ◽  
Abdul Manan Shaikh ◽  
Safdar Ali Ujjan ◽  
Javed Ahmed Ujan ◽  
...  

The longhorn beetles belongs to family Cerambycidae. The beetles are present in almost all ecosystems, except the ocean and Polar Regions. They are most the important biological control agents into agro-ecosystems. The beetles help in the biological control they eat extensive assortments of tree dwelling, soil dwelling insects and also eat caterpillars, maggots, aphids, bug, ants, wasp. Long horned beetles were gathered from different sites (agricultural fields and their surrounding vegetation) of district Naushahro Feroze with insect net (7.79 cm in diameter and 49.9 cm in length) and hand picking. A of 234 specimens were captured from October 2018 to July 2019. The material was identified into 07 species out of 06 genera. Of which Batocera rubus (Linnaeus, 1758), New Record from Sindh, Batocera rufomaculata (Charles De Geer, 1775), New Record from Sindh, Apriona cinerea (Chevrolat, 1852), New Record from Sindh, Archopalus exoticus (Sharp, 1905), New Record from Pakistan Macrotoma crenata (Fabricius, 1801), New Record from Pakistan, Prionus corpulantus (Bates, 1878) New Record from Sindh, Dorysthenes hugelii (Redtenbacher, 1848), New Record from Pakistan. The highest ratio of specimens were recorded from Mehrabpur and lowest ratio of specimens were recorded from Moro.


2021 ◽  
Vol 740 ◽  
Author(s):  
Filippo Di Giovanni ◽  
Pier Luigi Scaramozzino ◽  
Augusto Loni ◽  
Andrea Lucchi

Despite their importance as potential biological control agents, species of the campoplegine genus Campoplex Gravenhorst, 1829 are hard to identify. Previous works provided short descriptions or poor illustrations of crucial characters, meaning it is often impossible to distinguish closely related species. We provide illustrations to identify species of the Campoplex difformis group and redescriptions of and illustrations for C. difformis (Gmelin, 1790), C. capitator Aubert, 1960, C. dubitator Horstmann, 1985, C. formosanae Horstmann, 2012, and C. unicingulatus (Schmiedeknecht, 1909). In addition, the taxonomic status of C. difformis is clarified; a lectotype is designated for C. capitator in Aubert’s collection in Lausanne and the host record for this species on Ancylis mitterbacheriana (Denis & Schiffermüller, 1775) is queried; Campoplex corsicator Aubert, 1960 stat. nov. is removed from synonymy with Campoplex tibialis (Szépligeti, 1916) and redescribed.


2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Muhammad Musa Khan ◽  
Ze-Yun Fan ◽  
Dylan O’Neill Rothenberg ◽  
Jing Peng ◽  
Muhammad Hafeez ◽  
...  

Ultraviolet (UV) radiation significantly affects insect life and, as a result, has been widely used to control different invertebrate pests. The current results demonstrate that when Bemisia tabaci first instar nymphs are exposed to UV-A light for 12, 24, 48, and 72 h, their developmental and biological parameters are negatively affected by UV-A exposure; the effect increased with an increase in exposure time. We hypothesized that UV-A light is compatible with other biological control agents. Results showed that when the entomopathogenic fungus Cordyceps fumosorosea was applied to third instar nymphs of B. tabaci previously exposed to UV-A light, the LC50 was 3.4% lower after 72 h of exposure to UV-A light compared to the control. However, when the fungus was exposed to UV-A light, its virulence decreased with an increase in UV-A exposure time. The parasitism rate of Encarsia formosa against 24 h UV-A-exposed third instar nymphs of B. tabaci increased while the adult emergence from parasitized nymphs was not affected after UV-A light exposure. Parasitism rate was significantly reduced however following E. formosa exposure to UV-A light; but again, adult emergence was not affected from parasitized nymphs. The percentage mortality of E. formosa increased with increasing exposure time to UV-A light. The enzyme activity of SOD, CAT, GST, and AChE and the energy reserve contents were negatively affected due to UV-A exposure. Collectively, this study has demonstrated that UV-A light significantly suppresses the immune system of B. tabaci and that UV-A light is compatible with other biological control agents if it is applied separately from the biological agent.


Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 653
Author(s):  
Susan A. Wineriter-Wright ◽  
Melissa C. Smith ◽  
Mark A. Metz ◽  
Jeffrey R. Makinson ◽  
Bradley T. Brown ◽  
...  

Rhodomyrtus tomentosa is a perennial shrub native to Southeast Asia and is invasive in South Florida and Hawai’i, USA. During surveys of R. tomentosa in Hong Kong from 2013–2018 for potential biological control agents, we collected larvae of the stem borer, Casmara subagronoma. Larvae were shipped in stems to a USDA-ARS quarantine facility where they were reared and subjected to biology studies and preliminary host range examinations. Casmara subagronoma is the most recent Casmara species to be described from males collected in Vietnam and Indonesia. Because the original species description was based on only two male specimens, we also provide a detailed description of the female, egg, larva, and pupa. Finally, we conducted preliminary host range trials utilizing Myrtus communis, Myrcianthes fragrans, and Camellia sinensis. Casmara subagronoma emerged from M. fragrans, a Florida-native shrub, and larvae were able to survive in non-target stems for over a year (>400 days). Based on these findings and difficulty in rearing, we do not believe C. subagronoma is a suitable insect for biological control of R. tomentosa at this time, but may warrant further study. This investigation also illustrates the importance of host surveys for conservation and taxonomic purposes.


Zootaxa ◽  
2020 ◽  
Vol 4847 (1) ◽  
pp. 1-82
Author(s):  
PETER KOLESIK ◽  
RAYMOND J. GAGNÉ

Forty-seven species in 25 genera of gall midges (Diptera: Cecidomyiidae: Cecidomyiinae) known from Indonesia are reviewed. Available historic types were examined, and taxa are revised. Leefmansiella Kolesik & Gagné gen. nov. is erected for Trishormomyia pandani Felt. Actilasioptera falcaria (Felt) is found to be a senior synonym of Actilasioptera tumidifolium Gagné. Apoasphondylia orientalis Felt is transferred to Bruggmanniella Tavares, new combination; Asphondylia bursaria Felt is changed to Bruggmanniella, new combination; Contarinia eragrostidis Felt to Stenodiplosis Reuter, new combination; the Australian Contarinia brevipalpis Harris to Stenodiplosis, new combination; Dasyneura tetrastigma Felt to Gephyraulus Rübsaamen, new combination; and the Philippine Itonida paederiae Felt to Eucalyptodiplosis Kolesik, new combination. For each species, type data, a description, the basic biology and the known geographical distribution are given. A key to Cecidomyiidae genera based on adults, with references to described species, is provided. Species of economic importance, as pests of cultivated plants or biological control agents of weeds and pest arthropods, are listed. 


Zootaxa ◽  
2011 ◽  
Vol 2883 (1) ◽  
pp. 23 ◽  
Author(s):  
OMID JOHARCHI ◽  
BRUCE HALLIDAY

We report on a collection of mites in the family Laelapidae associated with scarabaeid beetles in Iran. Five known species are recorded from Iran for the first time: Coleolaelaps asiaticus Karg, 1999, Hypoaspis integer Berlese, 1911, Hypoaspis pentodoni Costa, 1971, Hypoaspis phyllognathi Costa, 1971, and Hypoaspis terrestris (Leonardi, 1899). Four new species are described: Coleolaelaps costai sp. nov., Hypoaspis larvicolus sp. nov., Hypoaspis maryamae sp. nov., and Hypoaspis melolonthae sp. nov. The ecological relationship between these mites and their beetle hosts has not been analysed in detail, but they probably do not play a major role as biological control agents of pest scarabs.


2018 ◽  
Vol 36 ◽  
Author(s):  
C. OZASLAN ◽  
E. HÜSEYIN ◽  
S. FAROOQ ◽  
H. ONEN

ABSTRACT: This article presents new records of fungi and downy mildews in Turkey on different weeds of agrophytocoenosis. These records include Plectosphaerella alismatis (Oudem.) A.J.L. Phillips, Carlucci & M.L. Raimondo (on Alisma plantago-aquatica L.), Pyricularia grisea Sacc. (on Setaria viridis (L.) P. Beauv.), Phakopsora artemisiae Hirats. (on Artemisia dracunculus L.), Puccinia rubefaciens Johanson (on Galium sp.), Ustilago trichophora (Link) Kunze (on Echinochloa crus-galli (L.) P. Beauv.), Peronospora astragalina Syd. (on Astragalus homosus L.) and P. myagri Mayor (on Myagrum perfoliatum L.). Plectosphaerella and Phakopsora as generic level and others as species are new records from Turkey. Description and illustrations of the identified fungi are presented, which all are based on Turkish specimens. The identified fungi could be potential biological control agents; however, detailed studies are needed in this regard.


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