The optimal formula of Beta-Cypermethrin aqueous capsule suspension was screened out through the experiment, preparation and manufacture of basic formulas, which has no sedimentation, suspended drops of oil, peels and...The optimal formula of Beta-Cypermethrin aqueous capsule suspension was screened out through the experiment, preparation and manufacture of basic formulas, which has no sedimentation, suspended drops of oil, peels and agglomerating and the diameter of capsule is in range of 10-30 靘, conformed to the technical requirement. The aftereffect of the 3.3% Beta-Cypermethrin aqueous capsule suspension which was manufactured according to the optimal formula was up more than 25 days. The experiments on controlling the larvae of Dendrolinmus superans Butler and the adults of Xylotrechus rusticus L were carried out with different concentrations of this chemical. The death rate reached 80% when 250 times solution of the chemical was sprayed on stem to control the larvae of D. superans. For control of the adults of X. rusticus, 200, 400 and 600 times solution of the chemical were applied and their control effects (death rate) reached 85.23%, 74.21% and 66.59% respec-tively. Two kinds of solution (200 times and 300 times) of the chemical were used to control the larvae of D. superans in large area, and the control effect for both concentrations was over 90%.展开更多
In recent vears, as the inerease of the artificial forest, the damages by the forest rats are beeoming more and more serious, which have ereated a lot damage to forest. This report is the results of our experiments us...In recent vears, as the inerease of the artificial forest, the damages by the forest rats are beeoming more and more serious, which have ereated a lot damage to forest. This report is the results of our experiments using coumateralyl to control forest rats. The experiments that we earry out here include the measurement of the toxicity of this rodenticides to those rats, the indoor and outdoor tests of the efficiency of those rodenticides, the second time poisoning experiment and the investigation of the safety of that compound. The results shown that baits with coumatetralyl as main rodentieides is verv effieient safe and ceonomic in the control of those forest rats This rodenticides and phosazetim can be used altemately in the control of those forest rats to prevent the resistance of the rats and to promote the control effect.展开更多
文摘The optimal formula of Beta-Cypermethrin aqueous capsule suspension was screened out through the experiment, preparation and manufacture of basic formulas, which has no sedimentation, suspended drops of oil, peels and agglomerating and the diameter of capsule is in range of 10-30 靘, conformed to the technical requirement. The aftereffect of the 3.3% Beta-Cypermethrin aqueous capsule suspension which was manufactured according to the optimal formula was up more than 25 days. The experiments on controlling the larvae of Dendrolinmus superans Butler and the adults of Xylotrechus rusticus L were carried out with different concentrations of this chemical. The death rate reached 80% when 250 times solution of the chemical was sprayed on stem to control the larvae of D. superans. For control of the adults of X. rusticus, 200, 400 and 600 times solution of the chemical were applied and their control effects (death rate) reached 85.23%, 74.21% and 66.59% respec-tively. Two kinds of solution (200 times and 300 times) of the chemical were used to control the larvae of D. superans in large area, and the control effect for both concentrations was over 90%.
文摘In recent vears, as the inerease of the artificial forest, the damages by the forest rats are beeoming more and more serious, which have ereated a lot damage to forest. This report is the results of our experiments using coumateralyl to control forest rats. The experiments that we earry out here include the measurement of the toxicity of this rodenticides to those rats, the indoor and outdoor tests of the efficiency of those rodenticides, the second time poisoning experiment and the investigation of the safety of that compound. The results shown that baits with coumatetralyl as main rodentieides is verv effieient safe and ceonomic in the control of those forest rats This rodenticides and phosazetim can be used altemately in the control of those forest rats to prevent the resistance of the rats and to promote the control effect.
