Descriptor: Stewarts Wilt (STEWARTS-WILT)



 
Definition:
Plant response to the Stewart's wilt organism (Pantoea stewartii subsp. stewartii (Smith) Mergaert, Verdonck & Kersters) formerly called (Erwinia stewartii (Smith) Dye ). The trait is coded 1-9 with 1 representing the most resistant response and 9 the most susceptible response.
Crop:
MAIZE
Category:
Disease descriptors
Status:
Data Type:
Alpha/numeric descriptor
Maximum Length:
1
Responsible Site:
North Central Regional Plant Introduction Station  (NC7)

Distribution of Values for Stewarts Wilt (STEWARTS-WILT)

CodeDefinitionNumber of Accessions
1(1) Little or no spread.116
2(2) Limited spread with water-soaking, chlorosis, or necrosis withiint 3 cm.423
3(3) Limited spread predominately toward tip end of leaf only.1205
4(4) Abundant spread bi-directionally in inoculated leaves only.2162
5(5) Minimal systemic infection as small, linear streaks on non-inoculated leaves.1172
6(6) Moderate systemic infection with 5-25% symptomatic leaf area on non-inoculated leaves.441
7(7) Abundant systemic infection and stunting with 25-50% symptomatic leaf area on non-inoculated leaves.156
8(8) Severe systemic infection and stunting with 50-90% of the plant infected.75
9(9) 90-100% infection, severe necrosis, or dead plants.25