| Ray had it right with his comment on the effect of S-Kinoprene, sold as Enstar II, on immature stages of scale. The data sheets on this chemical are clear, it is a juvenile hormone analog that disrupts the molting process of the affected insects. It does not behave as a normal insecticide. It has minimal if any effect on adults other than apparently inducing abortion of embryos. Further, S-Kinoprene is largely specific to heteropteran insects in the suborder Sternorrhyncha, i.e. scales, mealybugs, whiteflies, aphids, and has minimal if any effect on other insects. Research continues on other juvenile hormone analogs for use on other pest insects. S-Kinoprene has no documented effect on mites, they are not insects. Failures in the use of S-Kinoprene are usually due to the usual excessive expectation of annihilation of the pest, improper application, and which cannot be done without complementary use of normal insecticides. Resistance, in the sense of normal insecticides, to S-kinoprene does not exist, either in valid documentation or theory (that would be akin to claiming that there are teenagers resistant to testosterone!); however, individual pests with a low exposure to the application or one that has matured will continue development. paul On Feb 27, 2006, at 9:52 PM, First Rays wrote:
|
_______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
