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Table 1. Known susceptibility of Harmonia axyridis to various insecticides and acaricides.
Product Rate* or units for LC50 Method1 Relative acute susceptibility2 or LC50 Citation
Larvae Adults
Abamectin + petroleum oil 0.0015 + 1.0 % AI L:R(s) High (Michaud, 2002c)
Alphamethrin ppm(AI) L:D(t) 87.93 100.04 (Cho et al., 1997)
Azadiractin 1.25 ml/l L:DR(s) Low (Smith and Krischik, 2000)
Azocyclotin ppm(AI) L:D(t) >40,000 >40,000 (Cho et al., 1996)
Beauvaria bassiana, strain GHA 7.5 ml/l L:DR(s) Low (Smith and Krischik, 2000)
Bifenzate 0.001% (AI) L:DR(s) Moderate (James, 2002)
Carbaryl 5.21 ml/l L:DR(s) High (Smith and Krischik, 2000)
Chlorpyrifos 0.45% AI L:D(s) High (Michaud, 2002d)
Chlorpyrifos 0.45% AI L:R(s) High (Michaud, 2000d)
Deltamethrin ppm(AI) L:D(t) 19.65 89.35 (Cho et al., 1997)
Dicofol 0.03% AI L:D(s) Low (Michaud, 2002c)
Dicofol ppm(AI) L:D(t) >80,000 >80,000 (Cho et al., 1996)
Dicofol 0.03% AI L:R(s) Low (Michaud, 2002c)
Dichlorbenzuron 62.5 ml/l L:D(s) Low (Sun et al., 1999)
Dichlorbenzuron 62.5 ml/l L:O Low (Sun et al., 1999)
Diflubenzuron 0.03% AI L:D(s) Low (Michaud, 2002c)
Diflubenzuron 0.03% AI L:R(s) Low (Michaud, 2002c)
Esfenvalerate ppm(AI) L:D(t) 30.53 8.09 (Cho et al., 1997)
Ethion + petroleum oil 0.003% AI L:D(s) Low (Michaud, 2002d)
Ethion + petroleum oil 0.003% AI L:R(s) Moderate (Michaud, 2002d)
Fenbutatin oxide 0.24% AI L:D(s) Low (Michaud, 2002c)
Fenbutatin oxide 0.24% AI L:R(s) Low (Michaud, 2002c)
Fenpropathrin ppm(AI) L:D(t) 22.81 263.42 (Cho et al., 1997)
Fenpropathrin ppm(AI) L:D(t) 22.81 263.42 (Cho et al., 1996)
Fenpropathrin 0.5% AI L:R(s) High (Michaud, 2002d)
Fenpropathrin 100 mg/l L:D(s) High (Sun et al., 1999)
Fenpyroximate ppm(AI) L:D(t) >12,000 1811.04 (Cho et al., 1996)
Halofenozide mg/l L:O 67.1 (Carton et al., 2003)
Imidacloprid 0.053 kg(AI)/ha F:(s) Low Low (Wells et al., 2001)
Imidacloprid 0.005% AI L:D(s) Low (Michaud, 2002d)
Imidacloprid 0.15 g/l L:D(t) 0.085 (Vincent et al., 2000)
Imidacloprid 0.005% AI L:R(s) Moderate (Michaud et al., 2000)
Imidacloprid 0.15 g/l L:R(s) Low (Vincent et al., 2000)
Indoxacarb 0.0616 kg(AI)/ha F:(s) Moderate low (Musser and Shelton, 2003)
Methomyl ppm(AI) L:D(t) 148.26 34.95 (Cho et al., 1997)
Methoxyfenozide mg/l L:O 71.3 (Carton et al., 2003)
Monocrotophos ppm(AI) L:D(t) 208.64 366.7 (Cho et al., 1997)
Parrafinic oil 20 ml/l L:DR(s) Low (Smith and Krischik, 2000)
Phospamidon ppm(AI) L:D(t) 61.31 44.02 (Cho et al., 1997)
Pymetrozine 0.00022% AI L:DR(s) Low (James, 2002)
Pyridaben 0.038% AI L:D(s) Moderate (Michaud, 2002c)
Pyridaben ppm(AI) L:D(t) >25,000 >25,000 (Cho et al., 1996)
Pyridaben 0.038% AI L:R(s) Low (Michaud, 2002c)
Pyridaphenthion ppm(AI) L:D(t) 186.7 341.65 (Cho et al., 1997)
Pyriproxyfen 0.0013% AI L:D(s) Low Low (Michaud, 2002d)
Pyriproxyfen 0.0013% AI L:R(s) Low Low (Michaud, 2002d)
Soap, potassium salts, and fatty acids 20 ml/l L:DR(s) Low (Smith and Krischik, 2000)
Spinosad 0.0790 kg(AI)/ha F:(s) Moderate Modreate (Musser and Shelton, 2003)
Spinosad 0.05% AI L:D(s) Low Low (Michaud, 2002d)
Spinosad 0.05% AI L:R(s) Low Low (Michaud, 2002d)
λ-cyhalothrin 0.0262 kg(AI)/ha F:(s) High High (Musser and Shelton, 2003)
* If data on multiple rates were presented in the original manuscripts, the recommended field is presented here.

1 Methods: Upper case letters to the left of the colon indicate whether it was a laboratory study (L) or field study (F).
Upper case letters to the right of the colon indicate whether the pesticide was applied directly to the insect (D), the insect was exposed to residue (R), or the insect was exposed orally through consumption of treated food (O).
Lower case letters in parentheses indicate whether the pesticide was applied as a spray (s), as a topical application of drops (t), or as a dip (d).

2 Relative acute susceptibility ratings: Low = 0-33% mortality, Moderate=34-66% mortality, High = 67-100% mortality
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