Sudden collapsing of the seed lings occur in the seed bed.
The seedlings are attacked at the collar region and the attacked seedlings are toppled down.
The disease spreads through fungi present in the soil. The disease spreads through fungi present in the soil.
Management
Treat the seeds with Trichoderma asperellum @ 4 g / kg or Pseudomonas fluorescens @ 10 g /kg of seeds 24 hours before sowing.
Apply P. fluorescens to soil @ 2.5 kg/ha with 50 kg of FYM.
Avoid stagnation of water.
Seed treatment with antagonistic fungus viz. Trichoderma harzianum@ 4 g/kg seed or T. viride @ 4 g/kg seed along with application of pressmud @ 5 kg/m2 or carbofuran 3G @10 g/m2.
Application of carbofuran 3G @ 10g/m2at the time of sowing. Intercrop with marigold at 4:1 ratio. Apply Pseudomonas fluorescens @ 10g/m2 for nematodes and damping off disease complex.
The disease can be controlled by seed treatment with agrosan or ceresin @2gm/kg of seed.