Viral disease and their transmission agent
- Aphid: Banana top virus, Tristeza, Veinenation and woody gall, Ring spot, yellow mosaic, Beet yellow, Potato virus, Mosaic I and II.
- White fly: Leaf curl, yellow vein mosaic , Chilly/ cotton/ Papaya leaf curl, Mung bean yellow mosaic.
- Citrus psylla: Citrus greening
- Mealy bug: Mealy bug wilt.
- Thrips: Tomato spotted wilt virus
- Beetle: Cow pea/ squash/ brome mosaic
- Leaf hopper: Witches broom
Note:
- Test of bacterial disease: Ooze test
- Blight: Internally and externally seed borne
- Loose smut of wheat: Internally seed borne
- Covered smut of wheat: Externally seed borne
- Kernal bunt of wheat: Externally seed borne
- Foot rot/ Bakane disease: Externally seed borne
- Chirke and Furke disease: cardamom ( Viral disease)
Types of hosts
- Collateral host: Wild host of same family. Eg: Rust of cereals
- Alternate host: Wild host of other family. Eg: Meloidogyne