Symptom
Forked, split or damaged roots
Root crops show everything that happened underground: stones and fresh manure fork them, uneven water splits them, pests tunnel them, clubroot swells brassica roots.
Look closely at the damage: clean splits, legs, tunnels or swellings each point somewhere different.
Likely causes
Ordered from the usual answer to the less likely one. Each links to the full problem.
Recorded on Broccoli
-
Damage Common
Root damage
Forked roots in stony or compacted soil, or after transplanting. -
Fungal disease Possible
Clubroot
Brassica roots swollen into clubs.
Less likely on Broccoli
-
Watering Common
Uneven watering
Clean splits after a soaking following dry weather. -
Pest Common
Carrot fly
Rusty tunnels just under carrot skin. -
Soil & nutrients Possible
Too much nitrogen
Forked, hairy roots in freshly manured soil. -
Pest Possible
Wireworms
Narrow round holes through potatoes and roots. -
Bacterial disease Less likely
Aster yellows
Hairy, bitter carrots with bunched yellow shoots.