Descriptor: Russian Wheat Aphid Chlorosis (RUSSAPHID)



 
Definition:
Reaction to the Russian Wheat Aphid (Diuraphis noxia). Amount of chlorosis. See RWA Leafroll descriptor, also.
Crop:
RYE
Category:
Insect descriptors
Status:
Crop Germplasm Committee approved
Data Type:
Alpha/numeric descriptor
Maximum Length:
3
Responsible Site:
National Small Grains Collection (NSGC)


Studies or environments

Distribution of Values for Russian Wheat Aphid Chlorosis (RUSSAPHID)

CodeDefinitionNumber of Accessions
540% LEAF CHLOROTIC, CHLOROTIC SPOTS BEGIN TO COALESCE OR DEFINITE STREAKING OCCURS.11
655% LEAF CHLOROTIC, LARGER CHLOROTIC SPOTS COALESCE. LEAVES START TO "DIE-BACK" FROM TIPS.92
770% LEAF CHLOROTIC, FURTHER SYMPTOMS DEVELOP.208
885% LEAF CHLOROTIC, EXTENSIVE CHLOROSIS AND NECROSIS.303
9PLANT DEATH OR NO RECOVERY POSSIBLE528
MIXMIXED FOR RESISTANCE TO RUSSIAN WHEAT APHID15