Susceptibility of Liriomyza trifolii (Burgess) and L. sativae Blanchard (Diptera, Agromyzidae) to eleven strains of entomopathogenic fungi.
The susceptibility of Liriomyza trifolii and L. sativae to 11 strains of entomogenous fungi was studied in the laboratory. Pupae were placed in peat infected at a rate of about 108 conidiospores/g with suspensions of Beauveria bassiana (4 strains), Metarhizium anisopliae (3 strains), Paecilomyces farinosus (1 strain) and P. fumosoroseus (3 strains). At 25°C, L. trifolii was susceptible to P. farinosus (23% adult emergence) and 2 strains of P. fumosoroseus (2.5 and 4% adult emergence). An ambient temperature of 20°C slowed metamorphosis and so contributed to mycosis development. L. sativae was generally less susceptible than L. trifolii to the tested strains. M. anisopliae 78 and P. farinosus 46 were highly efficient as adults emerged from only 23.5% and 27.5% of pupae.