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How to Manage Pests

UC Pest Management Guidelines


Grasshopper adult.

Sugarbeet

Grasshoppers

Scientific name: Melanoplus spp.

(Reviewed 11/05, updated 11/05)

In this Guideline:


DESCRIPTION OF THE PEST

Several species of grasshoppers may attack sugarbeets. Both adults and nymphs can cause damage. Injury is more likely near the foothill rangeland; however, grasshoppers can migrate great distances.

DAMAGE

Grasshoppers consume foliage, and if infestations are severe, may defoliate entire fields.

MANAGEMENT

A large contingent of natural enemies serve to hold grasshopper populations in check most years. However, in outbreak years and particularly after an invasion, other intervention will likely be needed. Because most grasshopper problems begin outside of the field, migrating invaders should be monitored closely. Apply treatment if and when a field is invaded.

Common name Amount/Acre P.H.I.+
(trade name)   (days)

When choosing a pesticide, consider information relating to water quality and impact on natural enemies and bees.
       
A. CARBARYL    
  (Sevin 5 Bait)
30 lb
28 roots/forage
  MODE OF ACTION: A carbamate (Group 1A)1 insecticide.
  COMMENTS: Repeat applications as necessary up to a total of 2 times/year but not more often than 14 days apart.
   
+ Preharvest interval. Do not apply within this many days of harvest.
1 Modes of action are important in preventing the development of resistance to pesticides. Rotate chemicals with a different mode-of-action group number, and do not use products with the same mode-of-action group number more than twice per season. For example, the organophosphates have a group number of 1B; chemicals with a 1B group number should be alternated with chemicals that have a group number other than 1B. Mode of action is assigned by IRAC (Insecticide Resistance Action Committee). For additional information, see their Web site at http://www.irac-online.org/.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Sugarbeet
UC ANR Publication 3469
Insects and Mites
C. G. Summers, Entomology, Kearney Agricultural Center, Parlier
D. R. Haviland, UC IPM Program, Kern Co.
L. D. Godfrey, Entomology, UC Davis

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Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2005 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/r735301911.html revised: November 8, 2005. Contact webmaster.