2006 Late Season Seed Corn Survey

Table 3-9a, Pest Severities of Seed Corn in Ontario
Field# Northern Leaf Blight Anthracnose Leaf Blight Rust Gray Leaf Spot Stewart's Wilt Common Smut Ear Rot
Field #1
ND
Low
Low
ND
ND
ND
ND
Field #2
Low
Med
Low
Low
ND
Low
ND
Field #3
ND
Low
Low
ND
ND
Low
ND
Field #4
Low
Med
Low
Low
ND
Low
ND
Field #5
Med
ND
ND
Low
Low
Low
ND
Field #6
ND
Low
ND
Low
Low
Low
ND
Field #7
ND
Low
ND
Low
ND
ND
ND
Field #8
ND
Low
Low
Low
Low
ND
ND
Field #9
ND
Low
ND
Low
Low
Low
ND
Field#10
ND
Low
Low
Low
Low
Low
ND
Field#11
Low
Low
Low
Low
Low
ND
ND
Field#12
ND
Low
Low
Low
ND
Low
ND
Field#13
Died
ND
ND
ND
ND
Low
ND
Field#14
Low
Low
Low
Low
ND
Low
ND
Field#15
Low
Low
ND
Low
ND
Low
ND
Field#16
Low
Low
Low
Low
Low
ND
ND
Field#17
Low
ND
Low
Low
ND
Low
Low
Field#18
ND
Low
Low
ND
ND
Low
ND
Field#19
ND
Low
Low
Low
ND
ND
ND
Field#20
Med
Med
Low
Med
ND
ND
ND
Field#21
Low
Low
ND
Low
Low
ND
ND
Field#22
High
Low
Low
Low
Low
Low
ND
Field#23
ND
Low
ND
Low
Low
Low
Low
Field#24
Med
Low
ND
Low
ND
ND
ND
Field#25
ND
Low
Low
Low
Low
Med
ND
Field#26
Low
Low
Low
Low
Low
Low
ND
Field#27
Low
Low
ND
Low
ND
Low
Low
Field#28
Med
ND
ND
Low
Low
ND
ND
Field#29
ND
ND
ND
Low
ND
ND
ND
Field#30
Low
Low
Low
Low
ND
Low
ND
Field#31
ND
Low
Low
ND
ND
Low
ND
# fields
17
26
19
26
13
20
3


Stewart's Wilt: ELISA test positive
Rust:Common and/or Southern Rust
Ear Rot: Gibberella/Fusarium Ear Rot
Stalk Rot: Gibberella/Fusarium Stalk Rot
Pest severities were based on ECORC's pest screening rating

Leaf Diseases: ND=not detected; Low=less than 5% of leaf area with lesions;Intermediate (Med)=less than 25%of leaf area with lesions; and High=25% of leaf area with lesions; Died=75% of leaf area with lesions, leaves drying.
Ear and Stalk diseases: ND=not detected; Low= less than 5% of plants with disease; Intermediate (Med)=less than 25% of plants with disease; and High=25% of plants with disease.
European corn borer and Corn rootworm: ND=not detected; Low=less than 5% of plants with insect damage; Intermediate (Med)=less than 25% of plants with insect damage; and High=25% of plants with insect damage.
Corn flea beetle and Mites: ND=not detected; Low=less than 5% of leaf area damaged; Intermediate(Med)=less than 25% of leaf area damaged; and High=25% of leaf area damaged.



Table 3-9b, Pest Severities of Seed Corn in Ontario
Field# Stalk Rot European Corn Borer Corn Rootworm Corn Flea Beetle Grasshopper Others
Field #1
ND
Low
ND
ND
Low
Eyespot,mites
Field #2
ND
ND
ND
ND
Low
Mites
Field #3
ND
Low
Low
ND
Low
Mites
Field #4
ND
Low
Low
ND
ND
 
Field #5
ND
Low
ND
ND
ND
Virus,mites
Field #6
ND
Low
Low
ND
Low
 
Field #7
ND
ND
ND
ND
Low
 
Field #8
ND
ND
Low
ND
ND
 
Field #9
ND
ND
ND
ND
ND
Weeds,mites
Field#10
ND
ND
ND
ND
Low
Eyespot
Field#11
ND
ND
ND
ND
Low
 
Field#12
Low
Low
Low
ND
Low
Sunburn
Field#13
Low
Low
Low
ND
Low
 
Field#14
ND
Low
ND
ND
ND
Mites,Bird damage
Field#15
ND
ND
Low
ND
ND
Mites
Field#16
ND
ND
ND
ND
ND
Mites
Field#17
ND
Low
Low
ND
Low
Mites
Field#18
ND
ND
Low
Low
Low
Eyespot
Field#19
ND
ND
Low
ND
ND
Eyespot
Field#20
ND
Low
ND
ND
Low
 
Field#21
ND
Low
ND
ND
Low
 
Field#22
ND
Low
ND
ND
ND
Mites
Field#23
Low
ND
ND
ND
ND
Bird damage
Field#24
ND
Low
Low
ND
Low
Mites
Field#25
ND
Low
ND
ND
ND
 
Field#26
ND
Low
Low
ND
Low
Mites
Field#27
ND
Low
Low
ND
Low
Bird damage
Field#28
ND
Low
Low
ND
ND
Armyworm
Field#29
ND
Med
ND
Low
Low
Eyespot
Field#30
ND
ND
ND
ND
Low
 
Field#31
ND
Low
Low
ND
Low
 
# fields
3
19
15
2
19