Plant pathology

1. FFA Judging Contest
Plant Pathology
Study Guide
Revised 8-07

2. • 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

3. 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.

4. Corn - Smut

5. Corn - Smut
• Cut and destroy
diseased parts.
• Crop Rotation.
Control

6. Bean - Anthracnose

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

8. Cucumber - Bacterial Wilt

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

10. Tomato - Anthracnose

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

12. Wheat - Scab

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

14. Tomato – Root Knot Nematode

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

16. Rye - Ergot

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

18. Strawberry – Botrytis Rot

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

20. Corn - Rust

21. Corn - Rust
• No practical control
Control

22. Potato – Late Blight

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

24. Wheat - Powdery Mildew

25. Wheat - Powdery Mildew
• Resistant Varieties
Control

26. Corn–Maize Dwarf Mosaic Virus

27. Corn–Maize Dwarf Mosaic Virus
• Use Resistant
Varieties
Control

28. Tomato – Blossom End Rot

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

30. Tomato – Early Blight

31. Tomato – Early Blight
• Spray with Mancozeb
• Copper
• Bravo fungicides
Control

32. Tomato – Septoria Leaf Spot

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

34. Wheat – Glume Blotch

35. Wheat – Glume Blotch
• Treat seed with
suitable chemical
Control

36. Tomato – Late Blight

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

38. Strawberry – Leaf Blight

39. Strawberry – Leaf Blight
• Spray with Captan
Control

40. Apple - Scab

41. Apple - Scab
• Spay with Captan
• Rubigan + Captan
• Rubigan + Ziram
Control

42. Bean – Bacterial Blight

43. Bean – Bacterial Blight
• Use disease free seed
• Crop rotation
Control

44. Apple – Sooty Blotch

45. Apple – Sooty Blotch
• Spray with Captan
• Remove dead
branches
Control

46. Peach – Leaf Curl

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

48. Brambles – Crown Gall

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

50. Apple – Bitter Rot

51. Apple – Bitter Rot
• Spray with Captan
• Remove dead
branches
Control

52. Cherry – Brown Rot

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

54. Peaches – Brown Rot

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

56. Barley - Scald

57. Barley - Scald
• Use resistant varieties
Control

58. Apple – Cedar Rust

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

60. Strawberry – Leaf Spot

61. Strawberry – Leaf Spot
• Spray with Captan
• Topsin-M
Control

62. Apple – Frog-eye Leaf Spot

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

64. Barley – Covered Smut

65. Barley – Covered Smut
• Treat seed with
suitable chemical
Control

66. Apple – Fire Blight

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

68. Potato – Hopperburn

69. Potato - Hopperburn
• Spray with
Methoxychlor
Control

70. Barley – Stripe Rust

71. Barley – Stripe Rust
• Treat seed with
suitable chemical
Control

72. Corn – Northern Leaf Blight

73. Corn – Northern Leaf Blight
• Use resistant varieties
Control

74. Plum – Brown Rot

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

76. Potato – Black Leg

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

78. Barley – Powdery Mildew

79. Barley – Powdery Mildew
• Use resistant varieties
Control

80. Wheat – Loose Smut

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

82. Grapes – Powdery Mildew

83. Grapes – Powdery Mildew
• Bordeaux
• Fixed copper
• Bayleton
Control

84. Peach - Scab

85. Peach - Scab
• Spray with wettable
sulfur + Benlate
Control

86. Potato – Leaf Roll

87. Potato – Leaf Roll
• Use disease free seed
Control

88. Barley – Loose Smut

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

90. Potato - Scab

91. Potato - Scab
• Acidify soil
• Use resistant varieties
Control

92. Wheat – Stem Rust

93. Wheat – Stem Rust
• Use resistant varieties
• Destroy alternate host
Control

94. Wheat – Leaf Rust

95. Wheat – Leaf Rust
• Use resistant varieties
Control

96. Potato – Ring Rot

97. Potato – Ring Rot
• Use disease free seed
Control

98. Alfalfa - Leaf Spots

99. Alfalfa - Leaf Spots
• Cut foliage in a timely
manner
Control

100. Grapes - Black Rot

101. Grapes - Black Rot
• Ferbam
• Captan
• Bayleton
Control

102. Potato - Rhizoctonia

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

104. Brambles - Anthracnose

105. 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

106. Oats - Stem Rust

107. Oats - Stem Rust
• Use resistant varieties
• Destroy alternate host
Control

108. Crucifers - Club Root

109. Crucifers - Club Root
• Avoid infested soil
• Apply lime to soil
Control

110. Plum - Brown Rot

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

112. Potato – Early Blight

113. Potato – Early Blight
• Spray with Mancozeb
• Copper
• Bravo fungicides
Control

114. Alfalfa - Downy Mildew

115. Alfalfa - Downy Mildew
• Cut foliage in a timely
manner
Control

116. Bramble - Orange Rust

117. Bramble - Orange Rust
• Remove infested
plants, including roots
Control

118. Crucifers - Soft Rot

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

120. Clover - Sclerotinia Crown Rot

121. Clover - Sclerotinia Crown Rot
• No practical control
Control

122. Crucifers - Black Leg

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

124. Grapes - Downy Mildew

125. Grapes - Downy Mildew
• Bordeaux
• Fixed copper
Control

126. Plum - Black Knot

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

128. Clover - Rust

129. Clover - Rust
• No practical control
Control

130. Potato - Mosaic Virus

131. Potato - Mosaic Virus
• Use disease free seed
Control

132. Clover - Powdery Mildew

133. Clover - Powdery Mildew
• Use resistant varieties
Control

134. Cucurbits - Powdery Mildew

135. Cucurbits - Powdery Mildew
• Spray with Bravo
Control

136. Beans - Mosaic Virus

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

138. Cherry - Leaf Spot

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

140. Bean - Rust

141. Bean - Rust
• Sulfur dust
• Bravo fungicides
• Resistant varieties.
Control

142. Oats - Crown Rust

143. Oats - Crown Rust
• Use resistant varieties
Control

144. Oats - Loose Smut

145. Oats - Loose Smut
• Treat seed with
suitable chemical
Control

146. Tomato - Wilt Diseases

147. Tomato - Wilt Diseases
• Use resistant varieties
Control

148. Cucurbits - Anthracnose

149. Cucurbits - Anthracnose
• Mancozeb
• Bravo fungicides
• Topsin-M
Control

150. Cucurbits - Downy Mildew

151. Cucurbits - Downy Mildew
• Bravo fungicides
• Mancozeb
• Quadris
Control

152. Corn - Southern Leaf Blight

153. Corn - Southern Leaf Blight
• Use resistant varieties
Control

154. Peach - Yellows

155. Peach - Yellows
• Pull and destroy
disease trees
Control

156. Corn - Grey Leaf Spot

157. Corn - Grey Leaf Spot
• Use resistant varieties
Control