Quote:
Originally Posted by clkeiper
Spinosad is not a systemic. it will not enter the plant and have residual effects on insects. it is applied to the plant and sunlight breaks it down rather quickly so a spreader sticker should be used when applying it.
As per a spinosad fact sheet..... "Spinosad is a natural substance made by a soil bacterium that can be toxic to insects. It is a mixture of two chemicals called spinosyn A and spinosyn D. It is used to control a wide variety of pests. These include thrips, leafminers, spider mites, mosquitoes, ants, fruit flies and others". no where does it say it is a systemic or can be used as a systemic.
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That was my initial understanding until I stumbled on the following. Try it hydroponically. It works.
https://www.ncbi.nlm.nih.gov/pubmed/16180075
"Surprisingly, when spinosad was applied to the roots of tomato plants in rock wool, excellent control of spider mites was obtained. Apparently, spinosad has systemic properties and quantities as low as 1 mg/plant could protect tomato plants from mite infestation."