Probleme der chemischen Bekämpfung schädlicher Tiere im Walde
Spraying Toxaphen against mice in forest cultures seems to be doubtful on the strength of side effects. The effectiveness of toxic baits for mice control should be increased by raising attractiveness as well as by reducing the size of baits. Experiments showed that Tetrachlorvinfos can be used forHylobius-control in place of DDT. Within young coniferous stands cleared by chemicals bark beetles can be controlled by felled stems sprayed with BHC. For avio chemic measures against larvae in the crowns of conifer the best results were obtained by using insecticides mixed with Diesel oil.
Waldschutz und DDT-Verbot
SummaryForest protection and ban on applying DDT
 The bans on applying DDT enacted by the governments of BRD an other States are founded politically but not scientifically, DDT is the best and most harmless insecticide we ever have had. Its accumulation within the fat body of animals and men for a certain time does not cause pathological symptoms. Some effects unfavourable to wildlife animals are consequences of incorrect application.In forest protection in Germany DDT is needed also in future for controlling the weevielHylobius abietis, the lepidoptersRhyacionia buoliana andChoristoneura murinana as well as the sawflies of genusDiprion. It is demanded of the legislator to prolong the use of DDT in these cases until equivalent insecticides have been found. Lindan (γ-BHC)-compounds are not suitable for controllingHylobius beetles.
Catalytic removal of tert-butyldimethylsilyl (TBS) ether by PVP-I
Abstract A mild, efficient and rapid protocol the deprotection of alcoholic TBDMS ethers using PVP-1 as catalyst in methanol, the procedure of deprotection of various TBDMS ethers were found to be very convenient, easy work-up, high yielding.