Organophosphates |
Pyrethroids |
Phenylpyrazol |
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chlorethoxyphos (Fortress 5G) |
chlorpyrifos (Lorsban 15G & others) |
tebupirimphos & cyfluthrin (Aztec .1G) |
terbufos (Counter CR) |
tefluthrin (Force G3) |
fipronil (Regent 4 SC) |
|
Performance: test plots- |
2.8b 83 |
2.7b 90 |
2.3a 94 |
2.1a 95 |
2.3a 100 |
n/a n/a |
Performance: test plots - infurrow application Root damage rating1,2 Consistency of performance (%)3 |
2.7b 92 |
2.5ab 93 |
2.3a 92 |
2.2a 92 |
2.2a 100 |
_4 _4 |
1Average root damage rating (Iowa 1-6 scale) in 12-20 tests over five years, where damage in the untreated plots exceeded 3.5, the damage level above which economic losses are likely to occur. All insecticides had less damage than the untresated plots, which averaged 4.67. |
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