Crop diseases
Lettuce Diseases
Disease names frequently listed for Lettuce varieties. Prefer resistant cultivars and cultural prevention where possible.
Diseases mentioned for this crop
- Downy Mildew 90 mentions
- Lettuce Mosaic Virus 43 mentions
- Lettuce Drop 25 mentions
- Bottom Rot 23 mentions
- Powdery Mildew 15 mentions
- Tipburn 14 mentions
- Bacterial Leaf Spot 14 mentions
- Tip Burn 9 mentions
- Leaf Spot 7 mentions
- Damping Off 6 mentions
- White Rust 4 mentions
- Clubroot 4 mentions
- Bacterial Soft Rot 3 mentions
- Botrytis (Gray Mold 3 mentions
- Bacterial Spot 2 mentions
- Gray Mold 2 mentions
- Bolting In Hot Weather 1 mentions
- Bolting In Heat 1 mentions
- Lettuce Drop In Wet Conditions 1 mentions
- Premature Bolting In Heat 1 mentions
- Downy Mildew (Resistant Strains 1 mentions
- White Rust (Rarely Problematic 1 mentions
- Fusarium Wilt 1 mentions
- Downy Mildew In Very Wet Conditions 1 mentions
- Otherwise Disease-Free 1 mentions
- Heat Stress Disorders 1 mentions
- Tipburn In Extreme Conditions 1 mentions
- Bacterial Leaf Spot (Rare 1 mentions
- Tipburn In Extreme Heat 1 mentions
- Botrytis (Gray Mold) In Humid Conditions 1 mentions
- Club Root 1 mentions
- Damping Off (Seedlings In Waterlogged Conditions 1 mentions
- Bacterial Leaf Spot (Generally Disease Resistant Compared To Cultivated Lettuces 1 mentions
- Damping-Off In Seedlings 1 mentions
- Root Rot 1 mentions
- Bottom Rot (Resistant Variety 1 mentions
- Tipburn (Highly Tolerant 1 mentions
- Sclerotinia (Drop 1 mentions
- Septoria Leaf Spot 1 mentions
- Root Rot In Poorly Drained Soil 1 mentions
- Anthracnose 1 mentions
- Sclerotinia (White Mold 1 mentions
- Root Rot (In Waterlogged Conditions 1 mentions
- Downy Mildew (Intermediate Resistance In Bellezia 1 mentions
- Fungal Leaf Spots In Overly Wet Conditions 1 mentions
- Bottom Rot (In Excessive Moisture 1 mentions
- Powdery Mildew (Reduced Resistance In Bingo Compared To Predecessors 1 mentions
- Bolting (Excellent Resistance 1 mentions
- Tipburn (Excellent Resistance 1 mentions
- Gray Mold In High Humidity 1 mentions
Resistance notes from varieties
- Good tolerance to heat stress and some resistance to tipburn
- Good resistance to tipburn and moderate bolt resistance
- Moderate resistance to tipburn, susceptible to bottom rot in wet conditions
- Excellent heat tolerance and bolt resistance, moderate disease resistance
- Susceptible to tipburn and bottom rot, requires cool conditions to prevent bolting
- Good resistance to tip burn, moderate resistance to downy mildew
- Good heat tolerance, resistant to bolting, moderate disease resistance
- Good bolt resistance, moderate disease tolerance
FAQ: diseases of Lettuce
What diseases affect Lettuce?
Cultivar notes commonly mention Downy Mildew, Lettuce Mosaic Virus, Lettuce Drop, Bottom Rot, Powdery Mildew, Tipburn, Bacterial Leaf Spot, Tip Burn, Leaf Spot, Damping Off, White Rust, Clubroot. Choose resistant varieties where available and improve airflow / drainage to reduce risk.
Lists are aggregated from cultivar notes, not a lab diagnosis. Confirm with local extension before treating.