Thresholds
Damaging populations are most likely in southwest Kansas in fields that stand five or more weeks between cuttings. Control measures are justified when there are 10 worms per sweep of the net, unless cutting will occur in the next few days.
Chemical control
|
Insecticide |
Rate |
|
Alpha-cypermethrin (Fastac EC) |
0.014 to 0.025 lb ai/acre (2.2 to 3.8 fl oz/acre) |
|
Beta-cyfluthrin (Baythroid XL) |
0.0125 to 0.022 lb ai/acre (1.6 to 2.8 fl oz) |
|
Carbaryl (Sevin) |
1 lb ai/acre |
|
Chlorantraniliprole (Prevathon) |
8 to 20 fl oz/acre |
|
Chlorpyrifos (numerous products) |
Check label, but generally 1 to 2 pints/acre |
|
Chlorpyrifos plus gamma-cyhalothrin (Cobalt Advanced) |
13 to 26 fl oz of product/acre |
|
Chlorpyrifos plus zeta-cypermethrin (Stallion) |
5 to 11.75 fl oz/acre |
|
Cyfluthrin (Tombstone) |
0.025 to 0.044 lb ai/acre (1.6 to 2.8 fl oz) |
|
Gamma-cyhalothrin (Proaxis, Declare) |
0.0075 to 0.0125 lb ai/acre (1.92 to 3.2 fl oz) (Declare: 1.02 to 1.54 fl oz/acre) |
|
Indoxacarb (Steward) |
6.7 to 11.3 fl oz/acre |
|
Lambda-cyhalothrin (numerous products) |
0.015 to 0.025 lb ai/acre |
|
Methomyl (Lannate) LV |
1.5 to 3 pts/acre, SP 0.5 to 1 lb/acre |
|
Lambda-cyhalothrin chlorantraniliprole (Besiege) |
5 to 10 fl oz/acre |
|
Zeta-cypermethrin (Mustang MAXX, etc.) |
0.014 to 0.025 lb ai/acre (2.24 to 4 fl oz) |
|
Lambda-cyhalothrin plus chlorantraniliprole (Besiege) |
5 to 10 fl oz/acre |
|
Zeta-cypermethrin (Mustang MAXX, etc.) |
0.014 to 0.025 lb ai/acre (2.24 to 4 fl oz) |
Non-chemical controls
Most populations are usually held in check by naturally occurring parasites and diseases, and infestations seldom reach economic levels.
Content authors
Disclaimers
This content may not be suitable for states other than Kansas.
