Open Access Collection
Apple, Effect of IGRS on Stethorus Punctum Egg Viability, 1990
Leaves with eggs of SP were randomly collected from an apple orchard heavily populated with this predator. Leaves with eggs were brought into the laboratory and held at 20°C for 24 h. The leaves were dipped for 2 sec in solutions of various materials and allowed to air dry, then transferred to petri dishes containing moist pieces of paper towels to maintain high relative humidity. The dishes were placed in a growth chamber set at 20°C, 16:8 (L/D). Each treatment was replicated five times with 6-8 eggs/replicate. Eggs were exmained every 2-3 d to determine hatch and larval survival.