Agriculture: Prune Pest Management Guidelines

Relative Impact of the Timing of Pesticide Applications on Natural Enemies

NATURAL ENEMY DORMANT BLOOM TIME IN-SEASON
Oil Oil + pyrethroid1 Oil + OP2 Oil +IGRs3 Oil + spinosad Bt4 IGRs3 Oil spinosad IGR5 OP2 pyrethroid1 spinosad carbamate6 Oil Neo-nicotinoid7
aphid parasites (Aphidius spp.) L L L L L L L L L M L-M8 L9 H H
caterpillar parasite (Copidosoma,10 Macrocentrus) L L L L L L L L M M H H M-H H H
lacewings L L M L L L L L L M M L–M L-M H M
lady beetles (Chilocorus spp.) L L L L L L L L M L H H H H
minute pirate bugs L M M L L L L L L L H H M H
predatory mites (Galendromus sp., Typhlodromus sp.) L H L L L L L L L L M H L H L
scale parasites (Aphytis sp.) L H L L L–M L L L H M H H H H H
spiders L L M L L L L L L H L H
H = high     M = moderate     L = low     — = no information
1 pyrethroid (e.g. Asana, Warrior)
2 OP = organophosphate (e.g. Diazinon, Guthion, Imidan)
3 IGR = insect growth regulator (Dimilin, Intrepid, Esteem, Seize)
4 Bt = Bacillus thuringensis
5 Inseason use of some IGRs (e.g., methoxyfenozide-Intrepid) has a reproductive impact on parasites and lacewings
6 carbamate (e.g. Sevin).
7 neonicotinoids (Actara, Provado)
8 inseason use of OPs on aphid parasites: Diazinon = M, Imidan = L
9 inseason use of pyrethroids on aphid parasites: Asana = L, Warrior = —
10 [=Paralitomastix]
Text Updated: 06/06
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