| Image |
Descriptor |
Description |
Photographer |
| 1402028 |
Symptoms |
Mild symptoms of this virus disease include leaf mottling and crinkling, prominent veins, and curved midribs. Leaf tissue, except for that around the veins, turns slightly yellow in color. This gives the veins a green-banded appearance. As the leaves mature, sunken brown spots may develop on the upper surface of the midrib. Systematic necrosis frequently occurs in cultivars resistant to root-knot nematodes. As lower leaves begin to ripen, midribs may turn black; leaves may die and fall from the stalk. If the stalk is split, areas of black discoloration will be found extending from top to bottom of the plant. |
R.J. Reynolds Tobacco Company Slide Set |
| 1402029 |
Symptoms |
Mild symptoms of this virus disease include leaf mottling and crinkling, prominent veins, and curved midribs. Leaf tissue, except for that around the veins, turns slightly yellow in color. This gives the veins a green-banded appearance. As the leaves mature, sunken brown spots may develop on the upper surface of the midrib. Systematic necrosis frequently occurs in cultivars resistant to root-knot nematodes. As lower leaves begin to ripen, midribs may turn black; leaves may die and fall from the stalk. If the stalk is split, areas of black discoloration will be found extending from top to bottom of the plant. |
R.J. Reynolds Tobacco Company Slide Set |
| 1402030 |
Symptoms |
Mild symptoms of this virus disease include leaf mottling and crinkling, prominent veins, and curved midribs. Leaf tissue, except for that around the veins, turns slightly yellow in color. This gives the veins a green-banded appearance. As the leaves mature, sunken brown spots may develop on the upper surface of the midrib. Systematic necrosis frequently occurs in cultivars resistant to root-knot nematodes. As lower leaves begin to ripen, midribs may turn black; leaves may die and fall from the stalk. If the stalk is split, areas of black discoloration will be found extending from top to bottom of the plant. |
R.J. Reynolds Tobacco Company Slide Set |
| 1440040 |
Symptoms |
The initial symptom of PVY infection is vein clearing on newly developing leaves. The extent of the vein clearing is intermediate between that caused by TEV and TVMV. Leaves then develop a faint mottling and the characteristic vein banding: dark green bands along the veins with lighter green tissue adjacent. The pattern is more regular than that caused by TVMV. Veinlets and veins may become necrotic on plants infected with severe strains of PVY. This Virus is transmitted from vegetables and weeds to tobacco by migrating aphids. |
R.J. Reynolds Tobacco Company Slide Set |
| 1497036 |
Symptoms |
PVY(Potato Virus Y)on Tobacco |
University of Georgia Plant Pathology Archive |
| 1524171 |
Symptoms |
|
Department of Plant Pathology Archive |
| 5374056 |
Symptoms |
|
Division of Plant Industry Archive |
| 5374057 |
Symptoms |
|
Division of Plant Industry Archive |
| 5374058 |
Symptoms |
|
Division of Plant Industry Archive |
