Alternatives to insecticides for control of the sugarbeet root maggot
1997
Campbell, L.G. | Smith, G.A. | Eide, J.D. (USDA Northern Crop Science Laboratory, Fargo, ND (USA). Northern Crop Science Laboratory) | Anderson, A.W. | Smith, L.J.
The sugarbeet root maggot (Tetanops myopaeformis) is a serious insect pest of sugarbeet in North America. Larvae feed on developing sugarbeet by tunneling along the root surface. Feeding causes yield loss by reducing stands early in the season and/or reducing root yields at harvest. Insecticide applied at planting is the primary control method. One resistant line, F1015, was released to breeders in 1996. Sugarbeet root maggot damage to F1015, as evidenced by the number and size of feeding scars is substantially less than for any commercial hybrid tested. The entomopathogenic fungi Metarhizium anisopliae has been the most successful root maggot biocontrol agent we have identified, to date. Damage ratings and yield data from two environments indicate that a fall (preceding planting) plus spring (planting time) application of fungi provides better control than a single application either spring or fall.
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