Indian Journal of Nematology

The median lethal concentrations (LC₅₀) of H. indica (10.8, 13.8, 23.8 and 15.7 IJs/larva) were lower than those of S. carpocapsae (13.8, 15.9, 28.8 and 19.4 IJs/larva) in sand, red and black soils at 10% moisture and also at 15% moisture in black soil, respectively after 48 h of post infection in third instar larvae of S. litura. The pathogenicity of H. indica was quicker with lower median lethal times (LT₅₀) (55.9–31.8, 66.3–33.1, 80.7–31.6 and 81.0–31.1 h) compared to S. carpocapsae (64.2–33.2, 69.3–35.5, 83.5–32.8 and 86.6–35.4 h) in the dosage range of 5–30 IJs/larva in sand and red soils, 10–50 IJs/larva in black soil at 10% moisture and 5–35 IJs/larva in black soil at 15% moisture, respectively. The pathogenic effects of the test EPNs were better in sandy soil followed by red soil both at 10% moisture, black soil at 15 and at 10% moisture.