Survey of Corn Pests in 2010 OCC Trials
Corn pest severities in Ontario Corn Committee trials in 2010.
(Part of survey conducted by X. Zhu, L.M. Reid, T. Woldemariam and A. Tenuta from Sept. 3-16, 2010)
Location |
Eyespot |
Rust |
ALB |
GLS |
NLB |
Smut |
Ear rot |
Stalk rot |
ECB |
CRW |
Mite |
Others* |
Tilbury |
ND |
Low |
Low |
Low |
Low |
Low |
Med |
Med |
Low |
Low |
Low |
Penicillium ear rot |
West Loren |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Med |
Low |
Low |
Aphids |
Ridgetown |
ND |
Low |
Low |
Low |
Med |
Low |
Low |
Low |
Low |
Low |
Low |
|
Wallaceburg |
Low |
Low |
Low |
Low |
Low |
Med |
Low |
High |
Low |
ND |
Low |
Aphids |
Kerwood |
ND |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
ND |
Low |
ND |
NLS and Aphids |
Ilderton |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
ND |
|
Exeter |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Med |
Low |
|
Blyth |
ND |
Low |
Low |
Low |
High |
Low |
ND |
ND |
Low |
Low |
Low |
|
Wingham |
ND |
Low |
Low |
Med |
High |
Low |
Low |
Low |
Low |
Low |
ND |
Bird damage |
Thorndale |
Low |
Med |
ND |
Low |
Med |
Low |
ND |
Low |
Low |
Low |
ND |
Hail damage |
Belmont |
Low |
Low |
Low |
Low |
Low |
Low |
ND |
Low |
Low |
Low |
ND |
|
Woodstock |
Low |
Med |
Low |
Med |
Med |
Low |
Low |
Low |
Low |
Low |
Low |
NLS and bird damage |
Waterloo |
Low |
Low |
Low |
Low |
Med |
Low |
Low |
Med |
Low |
Low |
low |
|
Alma |
Med |
Med |
Low |
High |
High |
Low |
ND |
Low |
Low |
Low |
ND |
Bird damage |
Elora |
Med |
High |
Low |
Low |
Low |
Low |
Low |
High |
Low |
Low |
ND |
|
Orangeville |
Low |
Med |
Low |
Low |
Low |
Low |
ND |
Med |
Low |
Low |
ND |
Stink bug |
Ottawa |
Low |
Low |
Low |
Low |
High |
Low |
Low |
Low |
Low |
Low |
Low |
|
Winchester |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Low |
Med |
Low |
ND |
Aphids and hail damage |
Lancaster |
High |
Low |
Low |
Low |
Med |
Low |
ND |
Low |
Med |
Low |
ND |
NLS and aphids |
Pakenham |
Med |
Med |
ND |
ND |
Low |
Low |
Low |
Low |
Low |
Low |
ND |
Aphids and bird damage |
*NLS = suspected northern leaf spot.
Rust = common rust, ALB = anthracnose leaf blight, GLS = gray leaf spot, NLB = northern leaf blight, Smut = common smut, Ear rot = Gibberella/ Fusarium ear rot, Stalk rot = Anthracnose /Gibberella /Fusarium/Pythium stalk rot, ECB = European corn borer, CRW = Corn Rootworm,.
Pest severity based on ECORC’s pest screening rating.
aFor leaf diseases, ND = not detected; Low = <5% of leaf area with lesions; Intermediate (Med) = <25% of leaf area with lesions; and High = ³25% of leaf area with lesions.
bFor ear, and stalk diseases, ND = not detected; Low = <5% of plants with disease; Intermediate (Med) = <25% of plants with disease; and High = ³25% of plants with disease.
cFor insects European corn borer and corn rootworm, ND = not detected; Low = <5% of plants with insect damage; Intermediate (Med) = <25% of plants with insect damage; and High = ³25% of plants with insect damage.
dFor mites, ND = not detected; Low = <5% of leaf area damaged; Intermediate (Med) = <25% of leaf area damaged; and High = ³25% of leaf area damaged.