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ARS Home » Pacific West Area » Pullman, Washington » Grain Legume Genetics Physiology Research » Research » Publications at this Location » Publication #358768

Research Project: Enhanced Agronomic Performance and Disease Resistance in Edible Legumes

Location: Grain Legume Genetics Physiology Research

Title: Lentil Disease Diagnostic Series: Pea Enation Mosaic Virus

item Porter, Lyndon

Submitted to: Extension Reports
Publication Type: Experiment Station
Publication Acceptance Date: 1/8/2019
Publication Date: 2/1/2019
Citation: Porter, L.D., Agindotan, B., Mcphee, K. 2019. Lentil Disease Diagnostic Series: Pea Enation Mosaic Virus. Extension Reports. PP1913.

Interpretive Summary: A short and concise disease diagnostic card was developed to help growers rapidly diagnose Pea enation mosaic on lentil through descriptions and color photographs of symptoms commonly associated with the disease. The card also provides important factors that favor disease, facts on how to manage the disease, and other factors that could potentially be mistaken for Pea enation mosaic virus infection.

Technical Abstract: Pea enation mosaic caused by Pea enation mosaic virus (PEMV) is a major disease of lentil. The following symptoms typically are associated with PEMV: 1) presence of small circular to elongated translucent spots or streaks, 2) mottling of leaves and vein clearing, 3) severe twisting/malformation of leaves, and 4) stunted growth and malformed pods. Factors favoring disease development include: 1) presence of pea, cowpea, green peach, potato or foxglove aphids that vector the virus, and 2) planting next to alfalfa fields that can harbor aphids that move after a cutting. Important facts about PEMV are: 1) the disease can also infect chickpea, pea, faba bean, vetch, crimson clover and lambsquarters, 2) the disease can be widespread throughout a field, 3) the virus is not seed-transmitted, 4) insecticidal seed treatments or sprays may help reduce secondary spread by killing aphids, and 5) the disease can be confused with herbicide, thrips, or other virus damage to plants.