It did take a bit of time for the yellowing to take place, but it was quit clear that it only happend to the angraecoid and I think I would say that it was general yellowing, not due to sunburn - just as if most of the plants desided it was time to drop the old leaves. But the leaves didnt drop, they just turned yellow. No petroleum added in anyway. Straight application of confidor only, and the pest we sprayed for had not been found in the angraecoids, only in the cattleya part... so I dodnt think it was secondary effects from the pests we were spraying to get rid of.
But yes it might not have been the confidor, could be something else, one never knows, but honestly I am not about the do any more tests on my plants :) But it would be good to hear what others have experienced.... On 10/15/05, Paul Johnson <[EMAIL PROTECTED]> wrote: > Karen, > Regarding the yellowing of angraecoid leaves following your use of > Confidor. . ., this is most interesting. Imidacloprid products are > recent on the market in most countries and there really is not a good > record of responses by many plants. > > How soon after spraying did you notice the yellowing? Are you > confident that it was the Confidor mix? Was there a petroleum > distillate carrier? Was the yellowing of a rounded spot nature, as > if it might sunlight burns through spray droplets, or of more diffuse > shapes or generalized yellowing? > > Yes, there is a miticide, or acaricide, mixed with imidacloprid to > provide mite control in many premixed solutions. The common one used > is fenbutatin-oxide. > > Paul > > > > On Oct 15, 2005, at 4:21 AM, Karen wrote: > > > We have used Confidor which is also an imidacloprid based product, > > it worked very well on getting rid of a small scale infection, but > > did nothing for the mites. Infact, when we first used it we > > actually got a mite problem, because it wiped out all the predators > > of the mites. > > > > And even if it is systemic please do repeated treatment or you risk > > creating resistant population of scale. > > > > There are some imidacloprid products that have other active agents > > added which make them effective against mites (not just oil), but I > > cannot remember what that ingredient is, but in Denmark Provado is > > suppoesed to be such a product... > > > > We saw no ill effects on any of our plants, except for the > > angreacoids, which got some yellow leaves where the spray had > > touched the leaves. Catts, Dendrobium etc seemed unaffected... > > > > Kind regards/ Karen > > _______________________________________________ > > the OrchidGuide Digest (OGD) > > [email protected] > > http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com > > > > > _______________________________________________ > the OrchidGuide Digest (OGD) > [email protected] > http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com > _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
