Research Article

Evaluation of Pathogenicity of Entomopathogenic Oomycetes Lagenidium giganteum and L. ajelloi against Anopheles Mosquito Larvae

Table 1

Lower and upper limits for LC50 of Lagenidium giganteum and L. ajelloi zoospores of the A. gambiae larvae at various time intervals.

Fungal speciesTime in hoursLC50 lower limit (zoospores/ml)LC50 (zoospores/ml)LC50 upper limit (zoospores/ml)SE

L. ajelloi242.14 × 1041.18 × 1052.15 × 105±97148.20
481.27 × 1041.43 × 1041.58 × 104±803.61
721.67 × 1026.05 × 1029.98 × 102±285.609
963.26127.08451.842±22.72

L. giganteum24Nil
48Nil
722.06 × 1042.32 × 1042.58 × 104±1326.12
962.87 × 1033.51 × 1034.14 × 103±325.45

Larval mortalities increased with exposure time and lower LC50 observed with L. ajelloi zoospores indicated that L. ajelloi is more toxic to A. gambiae larvae compared to L. giganteum.