1996 Dry Bean Grower Survey of Pest Problems and Pesticide Use in Minnesota and North Dakota 

 ER 44
1998

Insect Problems

    Grasshoppers were the worst insect problem for 7% of Northarvest survey respondents representing 6% of the dry bean acres reported (Table 34). Grasshoppers were more frequently reported to be the worst insect problem by Minnesota respondents (10% of respondents representing 8% of Minnesota respondents' acres reported). The potato leafhopper was the worst insect problem for 3% of Northarvest survey respondents and 6% of Minnesota respondents representing 2% and 3% of respondents' acres, respectively.

    Grasshoppers were reported as the worst insect problem in MN1, MN2, MN5, ND1, ND2, ND3, and ND4 (Table 35). However, it was reported as the worst insect problem on less than 10% of respondents’ acres in all of the above districts except MN1, where 12% of respondents' acres were affected. The potato leafhopper was the worst insect problem in MN3, MN4, and ND5; it was the worst problem on 24% of respondents' acres in MN4. These data contrast to those for 1995, when the potato leafhopper was the most common insect problem and grasshopper concerns were limited.

Insect Control Practices

    Insecticide use was very limited in 1996, as it was in 1995 (Table 36). Carbaryl was used on 0.9% of Minnesota respondents' acres and Dimethoate on 0.5%. Asana was used on 0.3% of North Dakota respondents' acres and Lorsban on 0.1%.

 

Table 34. Worst insect problema in 1996 for respondents in Minnesota
and North Dakota.

Worst Insect
Problem		 Respondents Acres Reportedb
Number % Number %
Minnesota
Grasshoppers 23 41.8 4,554 8.4
Potato Leafhopper 14 25.5 1,741 3.2
North Dakota
Grasshoppers 27 40.3 9,271 5.4
Potato Leafhopper 3 4.5 2,125 1.2
Northarvest
Grasshoppers 50 41.0 13,825 6.1
Potato Leafhopper 17 13.9 3,866 1.7

aInsect problems reported on more than 1% of respondents’ acres.
bRespondents’ acres only.


Table 35. Worst insect problema in 1996 in each Northarvest district for
respondents in Minnesota and North Dakota.

Northarvest District

Worst Insect Problem

Acres Reportedb

Number

%
Minnesota
MN1 Grasshopper 3,018 11.8
MN2 Grasshopper 355 5.7
MN3 Potato Leafhopper 285 5.3
   

   

Grasshopper 280 5.2
Seed Corn Maggot 113 2.1
MN4 Potato Leafhopper 1,456 23.8
    Grasshopper 251 4.1
MN5 Grasshopper 650 5.8
    Seed Corn Maggot 230 2.1
North Dakota
ND1 Grasshopper 2,395 6.4
ND2 Grasshopper 1,679 4.6
ND3 Grasshopper 1,330 3.1
ND4 Grasshopper 2,224 9.4
ND5 Potato Leafhopper 1,825 6.2
   

   

Grasshopper 1,643 5.6
Seed Corn Maggot 530 1.8

aInsect problems reported on more than 1% of respondents’ acres.
bDistrict respondents’ acres only.


Table 36. Insecticide usea in 1996 by
respondents in Minnesota and North Dakota.

Insecticide

Acres Treatedb
Number %
Minnesota
Carbaryl 493 0.9
Dimethoate 279 0.5
North Dakota
Asana 578 0.3
Lorsban 200 0.1

aData includes any insecticide applied to over 0.1% of
  respondents’ acres.
bRespondents’ acres only.

This site was last updated on November 14, 2002

 

202 Hultz Hall
Department of Entomology
College of Agriculture
Fargo, North Dakota 58105-5346
Phone: (701) 231-7581
FAX: (701) 231-8557

For more information, please contact:

Extension Entomologist: Phillip Glogoza   pglogoza@ndsuext.nodak.edu