157
FFA Judging Contest Plant Pathology Study Guide Revised 8-07
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 [email protected] [email protected]
•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
