Cavity spot

Caused by: Pythium spp.
Problem Category: Fungal Disease
Symptoms: Sunken, elliptical, gray lesions across the root; outer layer of root ruptures and develops dark, elongated lesions; small vertical cracks may form on the cavities
Comments: Fungi can persist in soil for several years and disease outbreaks are associated with wet soils; flooded soil increases the number of cavities formed
Management: Some cultural practices can control the disease: avoid planting in fields/areas known to previously had carrot spot; do not over-fertilize plants; application(s) of appropriate fungicide can provide adequate control
Control: spray 2 times Cowdung+Asafoetida solution in 10 days interval. or spray 6ml Fermented buttermilk to control the spot