Table 5a. Impact of different pesticide chemistries on key natural enemy groups

Chemical group

& trade name

Common name

Toxicity ratings to natural enemy groups*

Minute pirate bugs Anthocorids

Predatory plant bugs

Green lacewings

Brown Lacewings

Lady Beetles

Earwigs

Parasitic flies

Parasitic Hymenoptera

Spiders

Predatory mites

Adults

Nymphs

Adults & nymphs

Adults & nymphs

Adults & nymphs

Adults & nymphs

Amidines

Mitac 50WP

amitraz

2-3

2-3

X

1-2

1-2

1-2

X

3-4

2-3

3-4

3-4

Carbamates

Sevin 50WP

carbaryl

X

X

X

2

2

3-4

X

X

2-4

X

3-4

Lannate 1.88L

methomyl

2-3

2-3

X

2-3

2-3

X

X

2-3

2-3

2-3

4

Carzol 92SP

formetanate  hydrochloride

X

X

X

X

X

1-2

X

X

4

X

2-4

Vydate 2L

oxamyl

X

X

X

2

2

2-3

X

X

2-4

X

2-4

Carboxamides

Savey 50WP

hexythiazox

1-2

1-2

1-2

1-2

1-2

1-2

X

X

1-2

1-2

1

Carboxylic acid esters

Acramite 50WS

bifenazate

X

X

X

X

X

X

X

X

X

X

X

Chloronicotinyls

Assail 70WP

acetamiprid

X

X

X

X

X

X

X

X

X

1-2

X

Provado 1.6F

imidacloprid

2

2

X

1-2

1-2

2

X

X

2-4, 2

X

1-2

Calypso

thiacloprid

4

X

3

2

2

3

X

2

4

1

X

Actara 25WG

thiamethoxam

X

X

X

X

X

X

X

X

X

X

1-2

Glycosides

Agri-Mek 0.15EC

abamectin

3-4

3-4

X

X

X

2-3

X

X

2-3

3-4

3-4

Insect growth regulators

Dimilin 2L

diflubenzuron

2-4

2-4

X

2-4

2-4

2-4

X

X

2-4

1-2

X

Intrepid 2F

methoxyfenozide

X

X

X

X

X

X

X

X

1

X

1

Esteem 35WP

pyriproxyfen

X

X

X

X

X

X

X

X

X

X

X

Organochlorines

Kelthane 50WP

dicofol

X

X

X

X

X

X

X

X

X

X

X

Thiodan 50WSB

endosulfan

3-4

3-4

X

2-4, 1-2

2-4, 1-2

2-4

X

X

2

X

1-2

* IOBC toxicity ratings: 1 = harmless <25% mortality; 2 = moderately harmful 26-50% mortality; 3 = harmful 51 - 75% mortality; 4 = very harmful >75% mortality; X = no data available

Numbers in red adapted from '2003 Crop Protection Guide for Tree Fruits in Washington'