- Initially the young trifoliate leaves show chlorosis irregularly.
- Gradually, the extent of chlorotic areas increases.
- Soon leaves show mosaic mottling, vein banding, puckering and distortion.
- Severe infection results in considerable reduction of the size of new leaflets and also blistering and bleaching of leaves.
- The pods are also twisted, curved and reduced in size.
- The seeds in these pods are shriveled and few in number.
The virus belong to poty virus group and are transmitted by aphids in a non - persistent manner. Three species of aphids namely Myzus persicae, Aphis gossypii and A.craccivora are found to be the most efficient vectors. The virus perpetuates on several other hosts that includes both crop plants and weeds.
Select 25 plants at random and observe for mosaic symptoms