FFA Judging Contest Plant 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 McCutcheonMike Shamblin Extension Agent Extension Agent WVU Monongalia Co. Ext. OfficeWVU Clay Co. Ext. Office 26 Commerce Drive, WesMon PlazaNew Courthouse - Main Street Morgantown, WV 26501P.O. Box 119 (304) Clay, WV FAX (304) (304) FAX (304)

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

Cut and destroy diseased parts. Crop Rotation. Control

Bean - Anthracnose

Spray with Bravo Mancozeb Remove infected plants. Control

Cucumber - Bacterial Wilt

Provado dust Ambush Asana Pounce Rotenone for cucumber beetles. Control

Tomato - Anthracnose

Use 3 year rotation. Use clean seed. Mancozeb. Copper. Bravo Fungicides. Control

Wheat - Scab

If following corn, cover residue completely Treat seed with a suitable chemical. Control

Tomato – Root Knot Nematode

Buy nematode-free plants. Fumigate soil. Control

Rye - Ergot

Use disease free seed. Cut wild grass hosts. Control

Strawberry – Botrytis Rot

Renovate Thin old beds Captan Topsin-M Ronilan Control

Corn - Rust

No practical control Control

Potato – Late Blight

Spray with Mancozeb. Copper. Bravo fungicides. Control

Wheat - Powdery Mildew

Resistant Varieties Control

Corn–Maize Dwarf Mosaic Virus

Use Resistant Varieties Control

Tomato – Blossom End Rot

Mulch to keep an even water supply Keep calcium high. Control

Tomato – Early Blight

Spray with Mancozeb Copper Bravo fungicides Control

Tomato – Septoria Leaf Spot

Use 3 year rotation. Mancozeb. Copper. Bravo fungicides. Control

Wheat – Glume Blotch

Treat seed with suitable chemical Control

Tomato – Late Blight

Spray with Mancozeb Copper Terranil Bravo fungicides Control

Strawberry – Leaf Blight

Spray with Captan Control

Apple - Scab

Spay with Captan Rubigan + Captan Rubigan + Ziram Control

Bean – Bacterial Blight

Use disease free seed Crop rotation Control

Apple – Sooty Blotch

Spray with Captan Remove dead branches Control

Peach – Leaf Curl

Lime-sulfer in winter time Ferbam Sulfer Wettable Bravo fungicide Control

Brambles – Crown Gall

Avoid infested soil Remove infected plants Disease free plants Control

Apple – Bitter Rot

Spray with Captan Remove dead branches Control

Cherry – Brown Rot

Spray withCaptan + Topsin-M mixed. Control

Peaches – Brown Rot

Wettable sulfer Benlate plus Captan Benlat plus Sulfer Control

Barley - Scald

Use resistant varieties Control

Apple – Cedar Rust

Remove alternate host Rubigan + Captan Rubigan + Ziram Control

Strawberry – Leaf Spot

Spray with Captan Topsin-M Control

Apple – Frog-eye Leaf Spot

Spray with Captan Nova + mancozeb Remove diseased parts Control

Barley – Covered Smut

Treat seed with suitable chemical Control

Apple – Fire Blight

Remove diseased parts Streptomycin Bordeaux Fixed copper Control

Potato – Hopperburn

Potato - Hopperburn Spray with Methoxychlor Control

Barley – Stripe Rust

Treat seed with suitable chemical Control

Corn – Northern Leaf Blight

Use resistant varieties Control

Plum – Brown Rot

Spray with Captan Topsin-M mixed. Control

Potato – Black Leg

Treat seed with Captan Polyram Disease free seed Control

Barley – Powdery Mildew

Use resistant varieties Control

Wheat – Loose Smut

Hot water seed treatment Water soak treatment Treat seed with a suitable chemical Control

Grapes – Powdery Mildew

Bordeaux Fixed copper Bayleton Control

Peach - Scab

Spray with wettable sulfur + Benlate Control

Potato – Leaf Roll

Use disease free seed Control

Barley – Loose Smut

Treat seed with suitable chemical Hot water – long water soak treatment. Control

Potato - Scab

Acidify soil Use resistant varieties Control

Wheat – Stem Rust

Use resistant varieties Destroy alternate host Control

Wheat – Leaf Rust

Use resistant varieties Control

Potato – Ring Rot

Use disease free seed Control

Alfalfa - Leaf Spots

Cut foliage in a timely manner Control

Grapes - Black Rot

Ferbam Captan Bayleton Control

Potato - Rhizoctonia

No practical control Cultural practice- plant shallow and hill deep. Control

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

Use resistant varieties Destroy alternate host Control

Crucifers - Club Root

Avoid infested soil Apply lime to soil Control

Plum - Brown Rot

Spray with Captan and Topsin-M mixed. Control

Potato – Early Blight

Spray with Mancozeb Copper Bravo fungicides Control

Alfalfa - Downy Mildew

Cut foliage in a timely manner Control

Bramble - Orange Rust

Remove infested plants, including roots Control

Crucifers - Soft Rot

Prevent mechanical and insect injuries to plants Control

Clover - Sclerotinia Crown Rot

No practical control Control

Crucifers - Black Leg

Use clean seeds Hot water treatment Rovral Control

Grapes - Downy Mildew

Bordeaux Fixed copper Control

Plum - Black Knot

Cut and destroy diseased parts Spray with Captan Control

Clover - Rust

No practical control Control

Potato - Mosaic Virus

Use disease free seed Control

Clover - Powdery Mildew

Use resistant varieties Control

Cucurbits - Powdery Mildew

Spray with Bravo Control

Beans - Mosaic Virus

No chemical control. Control weeds Use disease free seed Control

Cherry - Leaf Spot

Spray with Captan and Topsin-M mixed Control

Bean - Rust

Sulfur dust Bravo fungicides Resistant varieties. Control

Oats - Crown Rust

Use resistant varieties Control

Oats - Loose Smut

Treat seed with suitable chemical Control

Tomato - Wilt Diseases

Use resistant varieties Control

Cucurbits - Anthracnose

Mancozeb Bravo fungicides Topsin-M Control

Cucurbits - Downy Mildew

Bravo fungicides Mancozeb Quadris Control

Corn - Southern Leaf Blight

Use resistant varieties Control

Peach - Yellows

Pull and destroy disease trees Control

Corn - Grey Leaf Spot

Use resistant varieties Control