Is Bydv a virus?

Is Bydv a virus?

Barley yellow dwarf virus (BYDV), a member of the Luteoviruses, is a group of five closely related virus strains. Strains of BYDV differ serologically and in virulence, host range and vector specificity. Virus particles are spherical. BYDV is transmitted by more than 20 aphid species.

What causes barley yellow dwarf virus?

When aphids feed on the phloem of the leaf, the virus is transmitted to the phloem cells. Once inside the plant, the virus begins to replicate and assemble new virions. This process requires significant metabolic input from the plant, and causes the symptoms of barley yellow dwarf disease.

What does Bydv look like?

The earliest symptoms are a slight discolouration of the youngest leaves, barley turns golden-yellow, wheat pale yellow and oats purple-red. PLants grow slowly and the discolouration develops further. Late in the season plants are clearly stunted, show extensive tillering, delay in heading and ripening.

Can oats get Bydv?

Barley yellow dwarf virus (BYDV) and cereal yellow dwarf virus (CYDV) are found damaging cereal crops worldwide. They infect wheat, barley, oats and grasses and are transmitted by aphids.

How do you prevent barley yellow dwarf virus?

Managing barley yellow dwarf virus

1. Genetic resistance. Select small grain cultivars with documented resistance or tolerance for BYDV.
2. Timely seeding. Plant winter wheat as late as practical in fall to avoid potential aphid activity in early fall as summer crops and grasses mature.
3. Cultural management.

What is cereal disease?

Cereal root diseases Cereal cyst nematode, take-all, rhizoctonia root rot, crown rot and root lesion nematode are important cereal diseases that can cause significant yield loss.

Is barley yellow dwarf caused by fungi?

Barley yellow dwarf is caused by a virus of the Luteovirus group, and is spread, or vectored, by aphids.

Which disease mainly attacks groundnuts?

In groundnut, fungi cause seed rots and seedling diseases such as root rot, stem rot, wilts, blight, . pod rot; and foliar diseases such as rust and early and late leaf spots.

What is black chaff?

Black chaff is a bacterial disease of wheat common in irrigated fields or in areas with abundant rainfall during the growing season. It is also known as bacterial stripe or bacte- rial leaf streak. The disease also occurs on barley, oats, rye, triticale, and many grasses.

How can groundnut disease be controlled?

Crop rotation with non-host crops preferably cereals. Deep burying of crop residues in the soil, removal of volunteer groundnut plants are important measures in reducing the primary source of infection. Spray Carbendazim 0.1% or Mancozeb 0.2% or Chlorothalonil 0.2%.