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 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 Control Cut and destroy diseased parts. Crop Rotation.

Bean - Anthracnose

Bean - Anthracnose Control Spray with Bravo Mancozeb Remove infected plants.

Cucumber - Bacterial Wilt

Cucumber - Bacterial Wilt Control Provado dust Ambush Asana Pounce Rotenone for cucumber beetles.

Tomato - Anthracnose

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

Wheat - Scab

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

Tomato – Root Knot Nematode

Tomato – Root Knot Nematode Control Buy nematode-free plants. Fumigate soil.

Rye - Ergot

Rye - Ergot Control Use disease free seed. Cut wild grass hosts.

Strawberry – Botrytis Rot

Strawberry – Botrytis Rot Control Renovate Thin old beds Captan Topsin-M Ronilan

Corn - Rust

Corn - Rust Control No practical control

Potato – Late Blight

Potato – Late Blight Control Spray with Mancozeb. Copper. Bravo fungicides.

Wheat - Powdery Mildew

Wheat - Powdery Mildew Control Resistant Varieties

Corn–Maize Dwarf Mosaic Virus

Corn–Maize Dwarf Mosaic Virus Control Use Resistant Varieties

Tomato – Blossom End Rot

Tomato – Blossom End Rot Control Mulch to keep an even water supply Keep calcium high.

Tomato – Early Blight

Tomato – Early Blight Control Spray with Mancozeb Copper Bravo fungicides

Tomato – Septoria Leaf Spot

Tomato – Septoria Leaf Spot Control Use 3 year rotation. Mancozeb. Copper. Bravo fungicides.

Wheat – Glume Blotch

Wheat – Glume Blotch Control Treat seed with suitable chemical

Tomato – Late Blight

Tomato – Late Blight Control Spray with Mancozeb Copper Terranil Bravo fungicides

Strawberry – Leaf Blight

Strawberry – Leaf Blight Control Spray with Captan

Apple - Scab

Apple - Scab Control Spay with Captan Rubigan + Captan Rubigan + Ziram

Bean – Bacterial Blight

Bean – Bacterial Blight Control Use disease free seed Crop rotation

Apple – Sooty Blotch

Apple – Sooty Blotch Control Spray with Captan Remove dead branches

Peach – Leaf Curl

Peach – Leaf Curl Control Lime-sulfer in winter time Ferbam Sulfer Wettable Bravo fungicide

Brambles – Crown Gall

Brambles – Crown Gall Control Avoid infested soil Remove infected plants Disease free plants

Apple – Bitter Rot

Apple – Bitter Rot Control Spray with Captan Remove dead branches

Cherry – Brown Rot

Cherry – Brown Rot Control Spray withCaptan + Topsin-M mixed.

Peaches – Brown Rot

Peaches – Brown Rot Control Wettable sulfer Benlate plus Captan Benlat plus Sulfer

Barley - Scald

Barley - Scald Control Use resistant varieties

Apple – Cedar Rust

Apple – Cedar Rust Control Remove alternate host Rubigan + Captan Rubigan + Ziram

Strawberry – Leaf Spot

Strawberry – Leaf Spot Control Spray with Captan Topsin-M

Apple – Frog-eye Leaf Spot

Apple – Frog-eye Leaf Spot Control Spray with Captan Nova + mancozeb Remove diseased parts

Barley – Covered Smut

Barley – Covered Smut Control Treat seed with suitable chemical

Apple – Fire Blight

Apple – Fire Blight Control Remove diseased parts Streptomycin Bordeaux Fixed copper

Potato – Hopperburn

Potato - Hopperburn Control Spray with Methoxychlor

Barley – Stripe Rust

Barley – Stripe Rust Control Treat seed with suitable chemical

Corn – Northern Leaf Blight

Corn – Northern Leaf Blight Control Use resistant varieties

Plum – Brown Rot

Plum – Brown Rot Control Spray with Captan Topsin-M mixed.

Potato – Black Leg

Potato – Black Leg Control Treat seed with Captan Polyram Disease free seed

Barley – Powdery Mildew

Barley – Powdery Mildew Control Use resistant varieties

Wheat – Loose Smut

Wheat – Loose Smut Control Hot water seed treatment Water soak treatment Treat seed with a suitable chemical

Grapes – Powdery Mildew

Grapes – Powdery Mildew Control Bordeaux Fixed copper Bayleton

Peach - Scab

Peach - Scab Control Spray with wettable sulfur + Benlate

Potato – Leaf Roll

Potato – Leaf Roll Control Use disease free seed

Barley – Loose Smut

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

Potato - Scab

Potato - Scab Control Acidify soil Use resistant varieties

Wheat – Stem Rust

Wheat – Stem Rust Control Use resistant varieties Destroy alternate host

Wheat – Leaf Rust

Wheat – Leaf Rust Control Use resistant varieties

Potato – Ring Rot

Potato – Ring Rot Control Use disease free seed

Alfalfa - Leaf Spots

Alfalfa - Leaf Spots Control Cut foliage in a timely manner

Grapes - Black Rot

Grapes - Black Rot Control Ferbam Captan Bayleton

Potato - Rhizoctonia

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

Brambles - Anthracnose

Brambles - Anthracnose Control Spray with lime-sulfur in spring when leaves show 1/2 inch growth; follow with Captan at bloom and two weeks after bloom.

Oats - Stem Rust

Oats - Stem Rust Control Use resistant varieties Destroy alternate host

Crucifers - Club Root

Crucifers - Club Root Control Avoid infested soil Apply lime to soil

Plum - Brown Rot

Plum - Brown Rot Control Spray with Captan and Topsin-M mixed.

Potato – Early Blight

Potato – Early Blight Control Spray with Mancozeb Copper Bravo fungicides

Alfalfa - Downy Mildew

Alfalfa - Downy Mildew Control Cut foliage in a timely manner

Bramble - Orange Rust

Bramble - Orange Rust Control Remove infested plants, including roots

Crucifers - Soft Rot

Crucifers - Soft Rot Control Prevent mechanical and insect injuries to plants

Clover - Sclerotinia Crown Rot

Clover - Sclerotinia Crown Rot Control No practical control

Crucifers - Black Leg

Crucifers - Black Leg Control Use clean seeds Hot water treatment Rovral

Grapes - Downy Mildew

Grapes - Downy Mildew Control Bordeaux Fixed copper

Plum - Black Knot

Plum - Black Knot Control Cut and destroy diseased parts Spray with Captan

Clover - Rust

Clover - Rust Control No practical control

Potato - Mosaic Virus

Potato - Mosaic Virus Control Use disease free seed

Clover - Powdery Mildew

Clover - Powdery Mildew Control Use resistant varieties

Cucurbits - Powdery Mildew

Cucurbits - Powdery Mildew Control Spray with Bravo

Beans - Mosaic Virus

Beans - Mosaic Virus Control No chemical control. Control weeds Use disease free seed

Cherry - Leaf Spot

Cherry - Leaf Spot Control Spray with Captan and Topsin-M mixed

Bean - Rust

Bean - Rust Control Sulfur dust Bravo fungicides Resistant varieties.

Oats - Crown Rust

Oats - Crown Rust Control Use resistant varieties

Oats - Loose Smut

Oats - Loose Smut Control Treat seed with suitable chemical

Tomato - Wilt Diseases

Tomato - Wilt Diseases Control Use resistant varieties

Cucurbits - Anthracnose

Cucurbits - Anthracnose Control Mancozeb Bravo fungicides Topsin-M

Cucurbits - Downy Mildew

Cucurbits - Downy Mildew Control Bravo fungicides Mancozeb Quadris

Corn - Southern Leaf Blight

Corn - Southern Leaf Blight Control Use resistant varieties

Peach - Yellows

Peach - Yellows Control Pull and destroy disease trees

Corn - Grey Leaf Spot

Corn - Grey Leaf Spot Control Use resistant varieties