Laboratory evaluation of four strains of pathogenic nematode species on major insect pests of sugar beet [electronic resource].

Includes references.

Evaluation of the entomopathogenic nematodes species , Steinrnmema rarum, Steinrnmema carpocapsae (Sc ), Steinrnmema spp (S6) and Heterorhabditis spp (HLs) against the prepupae and pupae of Pegomya mixta, larvae and pupae of Lixus junci and Hymenia recurvalis was carried out at 25 °C and 65% R.H. Concentration 500 and 250 IJs/ ml were tested and the results indicated that the mortality rate increased with increased dosage of nematodes. The highest mortality was 62.5% for (S6) and (Sc) against prepual stage of P. mixta at 250 IJs/ml, while it was moderate mortality was for S. rarum and HLs. The highest mortality of S. rarum was against pupal stage for some concentrations and other treatments gave moderate mortality, compared with the control. Also, the mortality percentages were the same for all treatments against prepupal and pupal stages at 500 IJs/ml, except for (S6) treatment with 92.5%mortality at the same concentration. All nematode species tested gave complete mortality (100%) for L. junci larvae when applied at either 500 or 250 IJs/ml.

Summary in Arabic.

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