Sunflower XIV-1
Sandhill Cutworm
Frank B. Peairs
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Cutworm Adult |
Cutworm Larva |
Field Biology and Identification
The sandhill cutworm is light-tan, semi-translucent, and has several pale, longitudinal stripes. This cutworm has one generation per year, it hatches in the fall then overwinters as a partially-grown larvae. Feeding resumes again in the spring and continues until mid-summer. Adults emerge in August and lay their eggs in the field.
Soil texture is one of the important physical factors that determines the distribution of this cutworm. This species prefers areas of very sandy soil and will only be found in those fields with a high percentage of sand.
Plant Response and Damage
Sandhill cutworms chew leaves and cut plants below the soil surface. Injury first appears as wilted leaves, then as dead plants. These cutworms spend most of their time below the soil surface, therefore most of their feeding injury occurs on underground parts of the plant. The larvae can be easily located by removing the sand from the base of dead or wilted young plants.
Management Approaches
Chemical Control
Check fields early and control if there is one cutworm per square foot or if stands are reaching the lower limit for optimum plant populations. Treatment may not be necessary if most larvae are fully grown (1 ? to 1 ? inches) and therefore close to the end of their feeding period.
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Product list for Sandhill Cutworm: |
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Pesticide |
Product/Acre (Fl oz. or oz. product) |
Preharvest Interval, remarks |
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Asana XLR,1 |
5.8 - 9.6 |
28 days. Do not feed forage or fodder tolivestock. Extremely Hazardous to Bees! |
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Baythroid XLR,1 |
0.8 - 1.6 |
30 days. Extremely Hazardous to Bees! |
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carbaryl1,2 |
See labels |
60 days. 30 days to graze or forage. Extremely Hazardous to Bees! |
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chlorpyrifos 4ER1,2 |
32 - 48 |
42 days. Do not graze. Up to 2 lb preplant. Up to 4.5 lb total AI/yr. Extremely Hazardous to Bees! |
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Delta Gold R,1 |
1.0 ? 1.5 |
21 days to harvest. Do not apply more than 0.045 lb ai/acre/crop.? Do not graze or feed treated forage to livestock. Extremely Hazardous to Bees! |
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lambda cyhalothrinR1,2 |
1.92 ? 3.20 |
45 days. Do not exceed 0.12 lb total AI/yr. Extremely Hazardous to Bees! |
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ProaxisR,1 |
1.92 ? 3.20 |
45 days. Do not exceed 0.06 lb total AI/yr. Extremely Hazardous to Bees! |
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RRestricted use pesticide. 1Labeled for chemigation. 2Generic active ingredient, may be additional formulations. |
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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. |
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Categories: Sunflower, Insects, Sandhill cutworm
Date: 5/17/2007