HPIPM:Bean Yellow Mosaic Virus

From BugwoodWiki

Author: Howard F. Schwartz, David H. Gent, Gary D. Franc and Robert M. Harveson

Bean Common Mosaic Virus Photo by Howard F. Schwartz, Colorado State University, Bugwood.org Taxonomy Kingdom: Viruses Phylum: Viruses Class: single stranded positive-sense RNA viruses Order: Unassigned single stranded positive-sense RNA viruses Family: Potyviridae Genus: Potyvirus Species: BCMV Scientific Name Potyvirus BCMV N/A

Contents 1 Identification and Life Cycle 2 Plant Response and Damage 3 Management Approaches 4 Biological Control 5 Cultural Control 6 Chemical Control

Identification and Life Cycle

Bean yellow mosaic is caused by Bean yellow mosaic virus, and is found in most bean producing regions of the world. The virus is vectored by several aphid species (at least 20) in a non-persistent manner; aphids acquire but lose the ability to transmit the virus within minutes of feeding. It is also transferred efficiently by mechanical inoculation. Bean yellow mosaic virus is not known to be seed transmitted, but it can infect many leguminous plants (i.e., peas, red clover, lupin). The virus over winters in alternate hosts.

Plant Response and Damage

Bean yellow mosaic symptoms appear as distinct dark and yellowish green areas. Infected plants often have bright yellow spots that intensify in color with plant age. Different strains of the virus cause varied symptoms, such as a faint yellow mosaic and stunting or distortion of leaves and severe stunting. Pod symptoms appear at a light green mottle and may be malformed.

Management Approaches

Biological Control

No biological control strategies have been developed for Bean yellow mosaic.

Cultural Control

The planting of resistant varieties is the most effective and practical disease management strategy.

Chemical Control

Chemical controls for Bean yellow mosaic are not available or necessary.

The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana. Criticism of products or equipment not listed is neither implied nor intended. Due to constantly changing labels, laws and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality.