FFA Judging ContestPlant Pathology

Study Guide

Revised 8-07

•The following PowerPoint presentation was assembled by Tom McCutcheon and Mike Shamblin. The information was assembled from various sources publicly available on the Internet. The information was gathered over a period of time and from sources too numerous to list individually. The author would like to acknowledge the assistance of these web sites and publicly express his sincere appreciation for the assistance.

•The presentation was assembled solely for educational purposes. The author did not or will never receive financial reward for the preparation of the presentation.

•The presentation may be copied and distributed in parts or in its entirety for educational purposes. If any part of this presentation is distributed, the efforts of Mr. McCutcheon and Mr. Shamblin in assembling the materials must be recognized. The distributor may not receive any financial compensation for this service.

•Tom McCutcheon Mike Shamblin Extension Agent Extension Agent Tom.McCutcheon@mail.wvu.edu Mike.Shamblin@mail.wvu.edu

•WVU Monongalia Co. Ext. Office WVU Clay Co. Ext. Office •26 Commerce Drive, WesMon Plaza New Courthouse - Main Street

Morgantown, WV 26501 P.O. Box 119•(304) 291-7201 Clay, WV 25043-0119 •FAX (304) 291-7202 (304) 587-4267• FAX (304) 587-7054

Instructions

The next time you left-click the mouse a new window will appear with a picture of a pest. Try to identify it. Once you have decided on what it is or have given up, left-click again and the common name will appear. The next slide will then ask questions about the disease and left-clicking will reveal the answers.

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