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