Restricted entry interval (REI) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Do not apply more than 0.4 lb a.i./acre/season.
Do not apply more than 4.5 lb a.i./acre/crop.ĬOMMENTS: Apply by ground equipment only. Apply at 5- to 7-day intervals as needed.
Ground application.ĬOMMENTS: Use low rate for variegated cutworm. Always read the label of the product being used.ĬOMMENTS: Apply when pests appear in damaging numbers, and repeat 7–14 days later if necessary. When choosing a pesticide, consider information relating to air and water quality, resistance management, and the pesticide's properties and application timing. The following are ranked with the pesticides having the greatest IPM value listed first-the most effective and least harmful to natural enemies, honey bees, and the environment are at the top of the table. Not all registered pesticides are listed. The larvae are greenish-gray and often curl up into a C-shape.Pesticide precautions Protect water Calculate VOCs Protect bees However, it is not unusual to find army cutworm above ground when populations are high (Figure 1). When scouting, it is critical to dig in the soil around individual canola plants to find the larvae. Army cutworms behave nocturnally and typically spend the daylight hours below ground. The economic threshold for chemical control is 1-2 cutworms per foot of row. Where infestations are high, army cutworms will remove all leaf tissue, leaving only the base of the stem (Figure 3). When minor feeding is observed, you may find leaves severed from the plant and laying on the soil surface. The larvae feed on the leaf tissue, leaving the plants with a fed-on appearance (Figure 2). Significant army cutworm pressure has been observed in fields northwest of Caldwell in Sumner County.Īrmy cutworms feed aggressively and significant damage can occur in a short period of time. With the onset of warmer temperatures, winter canola is breaking dormancy and army cutworms are now present in fields across Kansas.
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