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spinosad a product of a fungus in organic production?
An antibiotic product of a fungus, Spinosad, is providing effective
insect control. Is this product suitable for use in organic food
production? I do not know the answer and look forward to opinion from
organic gardeners.
Spinosad
A New Class of Insect Control Products DOW chemical
Spinosad demonstrates rapid contact and ingestion activity in insects
which is unusual for a biological product. The mode of action of
spinosad is characterized by excitation of the insect nervous system,
leading to involuntary muscle contractions, prostration with tremors,
and paralysis. These effects are consistent with the activation of
nicotinic acetylcholine receptors by a mechanism that is clearly novel
and unique among known insect control products. Spinosad also has
effects on GABA receptor function that may contribute further to its
insect activity. This mode of action is unique. Imidacloprid and other
nicotinic receptor-based insecticides act at a different site than
spinosad. Avermectin, although a natural product and a macrocyclic
lactone, also acts at a different site than spinosad.
Examples of Insect pests controlled by spinosad on current or future labels.
Common name Scientific name gm/ha
European corn borer Ostrinia nubilalis 25 -50
Tomato fruitworm Helicoverpa zea 40 - 100
Cabbage Looper Trichoplusia ni 50 - 100
Diamondback moth Plutella xylostella 15 -50
Southern armyworm Spodoptera eridania 50 - 100
Leafminers Liriomyza spp. 70 - 150
Melon thrips Thrips palmi 70 - 100
Fall armyworm Spodoptera frugiperda 25 - 100
Beet armyworm Spodoptera exigua 50 - 100
Colorado potato beetle Leptinotarsa decemlineata 25 - 80
Imported cabbageworm Pieris rapae 50 - 100
Tomato pinworm Keiferia lycopersicella 50 - 100
Grape Berry Moth Lobesia lobina 25 - 50
Cotton Leafworm Alabama argillacea 25-50
American bollworm Heliothis armigera 50 -100
Tomato hornworm Manduca quinquemaculata 40 - 100
Western flower thrips Frankliniella occidentalis 70 - 100
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