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FFA Judging ContestPlant Pathology
Study Guide
Corn - Smut
Corn - Smut
• Cut and destroy diseased parts.
• Crop Rotation.
Control
Bean - Anthracnose
Bean - Anthracnose
• Spray with Bravo• Mancozeb• Remove infected
plants.
Control
Cucumber - Bacterial Wilt
Cucumber - Bacterial Wilt
• Provado dust• Ambush• Asana• Pounce• Rotenone for
cucumber beetles.
Control
Tomato - Anthracnose
Tomato - Anthracnose
• Use 3 year rotation.• Use clean seed.• Mancozeb.• Copper.• Bravo Fungicides.
Control
Wheat - Scab
Wheat - Scab
• If following corn, cover residue completely
• Treat seed with a suitable chemical.
Control
Tomato – Root Knot Nematode
Tomato – Root Knot Nematode
• Buy nematode-free plants.
• Fumigate soil.
Control
Rye - Ergot
Rye - Ergot
• Use disease free seed.• Cut wild grass hosts.
Control
Strawberry – Botrytis Rot
Strawberry – Botrytis Rot
• Renovate• Thin old beds• Captan• Topsin-M• Ronilan
Control
Corn - Rust
Corn - Rust
• No practical control
Control
Potato – Late Blight
Potato – Late Blight
• Spray with Mancozeb.• Copper.• Bravo fungicides.
Control
Wheat - Powdery Mildew
Wheat - Powdery Mildew
• Resistant Varieties
Control
Corn–Maize Dwarf Mosaic Virus
Corn–Maize Dwarf Mosaic Virus
• Use Resistant Varieties
Control
Tomato – Blossom End Rot
Tomato – Blossom End Rot
• Mulch to keep an even water supply
• Keep calcium high.
Control
Tomato – Early Blight
Tomato – Early Blight
• Spray with Mancozeb• Copper• Bravo fungicides
Control
Tomato – Septoria Leaf Spot
Tomato – Septoria Leaf Spot
• Use 3 year rotation.• Mancozeb.• Copper.• Bravo fungicides.
Control
Wheat – Glume Blotch
Wheat – Glume Blotch
• Treat seed with suitable chemical
Control
Tomato – Late Blight
Tomato – Late Blight
• Spray with Mancozeb• Copper• Terranil• Bravo fungicides
Control
Strawberry – Leaf Blight
Strawberry – Leaf Blight
• Spray with Captan
Control
Apple - Scab
Apple - Scab
• Spay with Captan• Rubigan + Captan• Rubigan + Ziram
Control
Bean – Bacterial Blight
Bean – Bacterial Blight
• Use disease free seed• Crop rotation
Control
Apple – Sooty Blotch
Apple – Sooty Blotch
• Spray with Captan• Remove dead
branches
Control
Peach – Leaf Curl
Peach – Leaf Curl
• Lime-sulfer in winter time
• Ferbam• Sulfer Wettable• Bravo fungicide
Control
Brambles – Crown Gall
Brambles – Crown Gall
• Avoid infested soil• Remove infected
plants• Disease free plants
Control
Apple – Bitter Rot
Apple – Bitter Rot
• Spray with Captan• Remove dead
branches
Control
Cherry – Brown Rot
Cherry – Brown Rot
• Spray withCaptan + Topsin-M mixed.
Control
Peaches – Brown Rot
Peaches – Brown Rot
• Wettable sulfer• Benlate plus Captan• Benlat plus Sulfer
Control
Barley - Scald
Barley - Scald
• Use resistant varieties
Control
Apple – Cedar Rust
Apple – Cedar Rust
• Remove alternate host• Rubigan + Captan• Rubigan + Ziram
Control
Strawberry – Leaf Spot
Strawberry – Leaf Spot
• Spray with Captan• Topsin-M
Control
Apple – Frog-eye Leaf Spot
Apple – Frog-eye Leaf Spot
• Spray with Captan• Nova + mancozeb• Remove diseased parts
Control
Barley – Covered Smut
Barley – Covered Smut
• Treat seed with suitable chemical
Control
Apple – Fire Blight
Apple – Fire Blight
• Remove diseased parts• Streptomycin • Bordeaux• Fixed copper
Control
Potato – Hopperburn
Potato - Hopperburn
• Spray with Methoxychlor
Control
Barley – Stripe Rust
Barley – Stripe Rust
• Treat seed with suitable chemical
Control
Corn – Northern Leaf Blight
Corn – Northern Leaf Blight
• Use resistant varieties
Control
Plum – Brown Rot
Plum – Brown Rot
• Spray with Captan Topsin-M mixed.
Control
Potato – Black Leg
Potato – Black Leg
• Treat seed with Captan• Polyram• Disease free seed
Control
Barley – Powdery Mildew
Barley – Powdery Mildew
• Use resistant varieties
Control
Wheat – Loose Smut
Wheat – Loose Smut
• Hot water seed treatment
• Water soak treatment• Treat seed with a
suitable chemical
Control
Grapes – Powdery Mildew
Grapes – Powdery Mildew
• Bordeaux• Fixed copper• Bayleton
Control
Peach - Scab
Peach - Scab
• Spray with wettable sulfur + Benlate
Control
Potato – Leaf Roll
Potato – Leaf Roll
• Use disease free seed
Control
Barley – Loose Smut
Barley – Loose Smut
• Treat seed with suitable chemical
• Hot water – long water soak treatment.
Control
Potato - Scab
Potato - Scab
• Acidify soil • Use resistant varieties
Control
Wheat – Stem Rust
Wheat – Stem Rust
• Use resistant varieties• Destroy alternate host
Control
Wheat – Leaf Rust
Wheat – Leaf Rust
• Use resistant varieties
Control
Potato – Ring Rot
Potato – Ring Rot
• Use disease free seed
Control
Alfalfa - Leaf Spots
Alfalfa - Leaf Spots
• Cut foliage in a timely manner
Control
Grapes - Black Rot
Grapes - Black Rot
• Ferbam • Captan• Bayleton
Control
Potato - Rhizoctonia
Potato - Rhizoctonia
• No practical control• Cultural practice-
plant shallow and hill deep.
Control
Brambles - Anthracnose
Brambles - Anthracnose
• Spray with lime-sulfur in spring when leaves show 1/2 inch growth; follow with Captan at bloom and two weeks after bloom.
Control
Oats - Stem Rust
Oats - Stem Rust
• Use resistant varieties• Destroy alternate host
Control
Crucifers - Club Root
Crucifers - Club Root
• Avoid infested soil• Apply lime to soil
Control
Plum - Brown Rot
Plum - Brown Rot
• Spray with Captan and Topsin-M mixed.
Control
Potato – Early Blight
Potato – Early Blight
• Spray with Mancozeb• Copper • Bravo fungicides
Control
Alfalfa - Downy Mildew
Alfalfa - Downy Mildew
• Cut foliage in a timely manner
Control
Bramble - Orange Rust
Bramble - Orange Rust
• Remove infested plants, including roots
Control
Crucifers - Soft Rot
Crucifers - Soft Rot
• Prevent mechanical and insect injuries to plants
Control
Clover - Sclerotinia Crown Rot
Clover - Sclerotinia Crown Rot
• No practical control
Control
Crucifers - Black Leg
Crucifers - Black Leg
• Use clean seeds• Hot water treatment• Rovral
Control
Grapes - Downy Mildew
Grapes - Downy Mildew
• Bordeaux• Fixed copper
Control
Plum - Black Knot
Plum - Black Knot
• Cut and destroy diseased parts
• Spray with Captan
Control
Clover - Rust
Clover - Rust
• No practical control
Control
Potato - Mosaic Virus
Potato - Mosaic Virus
• Use disease free seed
Control
Clover - Powdery Mildew
Clover - Powdery Mildew
• Use resistant varieties
Control
Cucurbits - Powdery Mildew
Cucurbits - Powdery Mildew
• Spray with Bravo
Control
Beans - Mosaic Virus
Beans - Mosaic Virus
• No chemical control. • Control weeds• Use disease free seed
Control
Cherry - Leaf Spot
Cherry - Leaf Spot
• Spray with Captan and Topsin-M mixed
Control
Bean - Rust
Bean - Rust
• Sulfur dust• Bravo fungicides• Resistant varieties.
Control
Oats - Crown Rust
Oats - Crown Rust
• Use resistant varieties
Control
Oats - Loose Smut
Oats - Loose Smut
• Treat seed with suitable chemical
Control
Tomato - Wilt Diseases
Tomato - Wilt Diseases
• Use resistant varieties
Control
Cucurbits - Anthracnose
Cucurbits - Anthracnose
• Mancozeb• Bravo fungicides• Topsin-M
Control
Cucurbits - Downy Mildew
Cucurbits - Downy Mildew
• Bravo fungicides• Mancozeb• Quadris
Control
Corn - Southern Leaf Blight
Corn - Southern Leaf Blight
• Use resistant varieties
Control
Peach - Yellows
Peach - Yellows
• Pull and destroy disease trees
Control
Corn - Grey Leaf Spot
Corn - Grey Leaf Spot
• Use resistant varieties
Control