Cool soil conditions have delayed emergence of some early planted fields. Information from southern Iowa indicates that 3 weeks after planting some corn has yet to emerge. Poor plant stands may result from poor germination or be caused by soil insects such as white grubs or wireworms. For farmers that need to replant and that previously applied a soil insecticide, questions may be raised about what product can be legally used during the replanting operation.
To answer these questions, Kevin Black (Growmark, Bloomington, IL) and Kevin Steffey (extension entomologist, University of Illinois, Urbana, IL) developed the following list of insecticides and label information. With the exceptions of Lorsban, Pounce, and Warrior, no other insecticide can be used again during the replanting operation if it was previously applied in the field. This list provides guidelines only and the insecticide label should be consulted for all precautions.
|Product||Statement on Label||Notes|
|Aztec 2.1G||A maximum of 7.3 pounds of Aztec 2.1G may be applied per acre per crop season.||7.3 pounds per acre is equal to 6.7 ounces per 1,000 feet of row in 30-inch rows.|
|Aztec 4.67G||A maximum of 3.27 pounds of Aztec 4.67G may be applied per acre per crop season.||3.27 pounds per acre is equal to 3.0 ounces per 1,000 feet of row in 30-inch rows.|
|Capture 1.15G||Do not apply more than 0.1 pound active per acre per season as an at-plant application.||The label-recommended use rate for corn rootworm control is 6.4-8.0 ounces per 1,000 linear feet of row. This is equal to 0.8-0.1 pound active ingredient per acre in 30-inch rows.|
|Capture 2EC||Do not apply more than 0.1 pound active per acre per season as an at-plant application.||The label-recommended use rate for corn rootworm control is 0.30 fluid ounce, or 0.0046 pound active per 1,000 linear feet of row. This is equal to 0.08 pound of active ingredient per acre in 30-inch rows.|
|Counter CR||Only one at planting, postemergence incorporated, or cultivation time treatment of Counter CR may be used.|
|Force 3G||Use Force 3G only once per crop.|
|Fortress 2.5G||Do not make more than one application per year.|
|Fortress 5G||Do not make more than one application per year.|
|Lorsban 15G||For soil insect control, do not exceed the equivalent of 16 ounces of Lorsban 15G per 1,000 feet of row or 13.5 pounds of Lorsban per crop season. The label-recommended use rate of Lorsban 15G against corn rootworms is 8 ounces per 1,000 linear feet of row.||15G per acre applied as a broadcast application|
|Pounce 1.5G||Up to 0.6 pound active ingredient may be used per season.||The maximum label recommended use rate for cutworm control is 16 ounces per 1,000 feet of row, or 0.3 pound per acre in 30-inch rows.|
|Pounce 3.2EC||Up to 0.6 pound active ingredient may be used per season.||The maximum label recommended use rate for cutworm control is 8 fluid ounces (broadcast), or 0.2 pound per acre.|
|Regent 4SC||Make one in-furrow application at planting time only.|
|Warrior||Do not apply more than 0.12 pound (0.96 pint) per acre per season.|
This article originally appeared on pages 67-68 of the IC-488 (8) -- May 13, 2002 issue.