Curly top symptoms in an inoculated cotyledon of the sugar beet
Author AffiliationsKatherine Esau was Professor of Botany and Botanist in the Experiment Station, Davis.
Hilgardia 27(1):1-14. DOI:10.3733/hilg.v27n01p001. September 1957.
Virus of curly top disease was introduced, through one cotyledon, into seedlings of a highly susceptible sugar beet strain. The inoculated cotyledon developed phloem hyperplasia—abnormal multiplication of cells—characteristic of the curly top disease. This symptom was observed in the main vein and some small veins on the third day after inoculation. In many samples, the main vascular bundle also showed pronounced necrotic obliteration in the older part of the phloem tissue, a symptom not previously described for curly top infection.
Noninoculated cotyledons collected twelve days after inoculation of the experimental seedlings had developed no curly top symptoms.
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Chemical control of citrus stump sprouts
“Survival power” key to successful carrot stands
Low-residue micronutrient sprays for citrus
Range pasture benefits through tree removal
Effects of nitrogen and phosphorus rates on yields of inia 66 wheat
Broccoli for the San Joaquin Valley west side
Short season cotton in the San Joaquin Valley
Anatomic effects of barley yellow dwarf virus and maleic hydrazide on certain Gramineae