HPIPM:False Root Knot Nematode Sugarbeets

Taxonomy

Domain	Eukarya
Kingdom	Animalia
Phylum	Nematoda
Class	Chromodorea
Order	Tylenchida
Family	Pratylenchidae
Genus	Nacobbus

Scientific Name

Nacobbus aberrans

Scientific Name Synonyms

Nacobbus batatiformis

Common Name

false root-knot nematode

Author: Howard F. Schwartz, David H. Gent, Robert Harveson, Barry Jacobsen, and Martha Mikkelson

Identification and Life Cycle

Two species of false root-knot nematodes attack sugarbeets and cause gall-like swellings on roots; Nacobbus aberrans and N. dorsalis. False root knot nematodes have a broad host range, including broccoli, cabbage, carrot, pea, and other vegetables. Several weeds including kochia and lambsquarter are also hosts.

Plant Response and Damage

False root-knot nematodes cause large cavities that extend into the stele that induce necrosis and gall-like development on roots.

Biological Control

No biological control strategies have been developed for false root knot nematode.

Cultural Control

Do not return tare soil to sugarbeet fields. Control weeds in and around fields and irrigation canals. Practice a two year or longer crop rotation to nonhosts such as dry beans, small grains, corn, potato, or alfalfa. Plant early when soil temperatures are low.

Chemical Control

Product List for False Root Knot Nematode:

Pesticide	Rate	Preharvest Interval, Remarks
Telone II	9-12 gal/A	Restricted use; Preplant interval:
Soil Fumigant	26-35 oz/1000 row ft	1 wk + 1 wk per 10 gal applied
Temik 15 G	27-33 Ib/A	Restricted use; PHI 90 days, 120 days if tops fed to livestock
Lock `n Load	18-22 oz/1000 row ft

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.