Which pests are commonly vectors for plant viruses?

Which pests are commonly vectors for plant viruses?

• A. Aphids, leafhoppers, and thrips
• B. Beetles, slugs, and snails
• C. Spiders and mites
• D. Birds

Answer: (A)

Pest transmission of plant viruses mainly comes from sap-sucking insects that feed on the plant’s vascular tissues. Aphids, leafhoppers, and thrips are classic vectors because they move between plants while feeding, acquiring virus from an infected plant and then inoculating healthy ones during subsequent feeds. The timing and duration of feeding influence how the virus is carried and spread, with some viruses requiring an acquisition period and later inoculation in order to be transmitted. Other pests like beetles, slugs, and snails don’t typically serve as major virus vectors; they mostly cause damage through chewing or feeding on tissue rather than spreading viruses. Spiders and mites can contribute to disease in other ways or be incidental carriers in some situations, but they are not recognized as the common plant-virus vectors in ornamental pest management. Birds don’t transmit plant viruses in the usual sense either.

Pest transmission of plant viruses mainly comes from sap-sucking insects that feed on the plant’s vascular tissues. Aphids, leafhoppers, and thrips are classic vectors because they move between plants while feeding, acquiring virus from an infected plant and then inoculating healthy ones during subsequent feeds. The timing and duration of feeding influence how the virus is carried and spread, with some viruses requiring an acquisition period and later inoculation in order to be transmitted.

Other pests like beetles, slugs, and snails don’t typically serve as major virus vectors; they mostly cause damage through chewing or feeding on tissue rather than spreading viruses. Spiders and mites can contribute to disease in other ways or be incidental carriers in some situations, but they are not recognized as the common plant-virus vectors in ornamental pest management. Birds don’t transmit plant viruses in the usual sense either.