Your Soybean Checkoff.
The life cycle of SCN has three major stages: egg, juvenile, and adult female. The life cycle can be completed in 4 weeks under ideal conditions (soil temperatures at 75° F).
|SCN eggs released from a cyst.
Photo credit: Terry Niblack
Eggs develop into juveniles (J1, J2).
The second stage juveniles enter the soybean root to feed and grow.
Females then lay 50-100 eggs in an egg mass on their posterior end. Finally, the female fills up with 200 or more eggs.
Eventually, the egg-filled female dies and her body wall hardens to form a tough cyst around the eggs, as shown here.