Abstract
Treatment of the house cricket Acheta domesticus (L.) with tetraethyl pyrophosphate and dicrotophos causes a depletion of the catecholamine stores of the central nervous system. Fluorescence microscopy of the brain and frontal ganglion 30 min after knock-down revealed a reduction in the catecholamine-specific fluorescence of the corpus centrale and frontal ganglion neuropile. In the corpus centrale the effect was much more pronounced and less variable with dicrotophos than with tetraethyl pyrophosphate, whereas both compounds appeared to have similar effects on the frontal ganglion. The possible relationship of this depletion to symptoms of intoxication requires further investigation.
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