1,721,040 research outputs found
Application of Entomopathogenic nematodes to control overwintering larvae of Thaumetopoea pityocampa (Den. Et Schiff.) (Lepidoptera: Thaumetopoeidae)
No full textConfronto di mobilità tra IJs di Steinernema spp. e Heterorhabditis spp. (Nematoda: Rhabditida) in acqua ed in gel
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Infectivity comparison among chromatic and non-chromatic strains of Heterorhabditis bacteriophora Poinar 1976 (Rhabditida: Nematoda) in relation to temperature
No full textInfectivity comparison between "red" and "green" isolates of Heterorhabditis bacteriophora Poinar 1976 (Rhabditida: Nematoda) in relation to temperature
No full textDESICCATION TOLERANCE OF ALGERIAN STRAINS OF ENTOMOPATHOGENIC NEMATODES
No full textIn this study a preliminary contribution to the desiccation tolerance of Algerian entomopathogenic nematodes
(EPNs) is reported. Laboratory experiments were performed to assess the survival of 6 Algerian EPN strains upon
direct exposure of infective juveniles (IJs) to 2 relative humidities (rh) on membrane filters. The strains were isolated
from different biotopes in Algeria and belong to 2 species: Steinernema feltiae (4 strains) and Heterorhabditis
bacteriophora (2 strains). IJs were exposed to 84% and 76% rh at ~20°C for up to five days, and the percentage of
surviving IJs was recorded twice daily. Three replicate desiccators per time interval were used for each nematode strain
and the assays were repeated 3 times. Survival decreased as rh decreased and with increasing periods of exposure. The
tolerance of these nematodes to dessication was generally high, especially for the H. bacteriophora strains which
exhibited the longest survival ability. At 84% rh the H. bacteriophora strains displayed a desiccation tolerance of at least
5 days, with a survival percentage of 26-33%, while the other nematodes yielded a low survival percentage (8-11%)
after 5 days. At 76% rh H. bacteriophora again survived for a minimum of 5 days (12-18%) whereas the S. feltiae strains
survived for only 3 days (5-10% of surviving IJs). No significant differences in pathogenic activity and ability to
penetrate Galleria mellonella larvae were observed between non-desiccated IJs and rehydrated ones for any of the
strains
Applying entomopathogenic nematodes to Xanthogaleruca luteola (Coleoptera Chrysomelidae)-infested foliage
No full textBiocontrol of Rhytidoderes plicatus Oliv. (Coleoptera, Curculionidae) in potted savoy cabbages with entomopathogenic nematodes
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