Descriptor: Russian Wheat Aphid Chlor B2 (RUSSAPHID_BIOTYPE2)



 
Definition:
Reaction to the Russian Wheat Aphid Biotype 2 (Diuraphis noxia). Amount of chlorosis. See RWA Leafroll descriptor, also.
Crop:
WHEAT-INTERGENERIC
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 Chlor B2 (RUSSAPHID_BIOTYPE2)

CodeDefinitionNumber of Accessions
425% LEAF CHLOROTIC - SOME STREAKING MAY BECOME APPARENT, ESPECIALLY ALONG TH EMIDRIB.1
655% LEAF CHLOROTIC, LARGER CHLOROTIC SPOTS COALESCE. LEAVES START TO 3
770% LEAF CHLOROTIC, FURTHER SYMPTOMS DEVELOP.16
885% LEAF CHLOROTIC, EXTENSIVE CHLOROSIS AND NECROSIS.5
9PLANT DEATH OR NO RECOVERY POSSIBLE356