[Objective] The aim was to determine control effects of the 6 insecticides and recommended the optimal doses. [Method] In 2014, the control effects of sophocarpidine, pymetrozine, beta-cypermethrin, acetamiprid, imida...[Objective] The aim was to determine control effects of the 6 insecticides and recommended the optimal doses. [Method] In 2014, the control effects of sophocarpidine, pymetrozine, beta-cypermethrin, acetamiprid, imidacloprid, and chlor- pyrifos on wheat aphids were tested, and every pesticide was designed with three doses in Shou County, Anhui Province, to explore the significance of differences on control effects. [Result] The results showed that the control effects of the 6 insecti- cides were satisfied, and the insecticides were safe on wheat. [Conclusion] During initial diseasing stage of aphid, it is recommended to use sophocarpidine soluble concentrate （1.5%）, pymetrozine water dispersible granule （50%）, imidacloprid wet- table powder （25%）, and acetamiprid wettable powder （5%）, and chlorpyrifos missi- ble oil （40%）, cypermethrin missible oil （4.5%） and imidacloprid wettable powder （25%） can be applied in peak-diseasing stage.展开更多
Luseweilei is an easily-bursted microcapsule insecticide. A test of effectiveness of the insecticide to control the larvae of Dendrolimus superans T. was carried out in larch forest in Baoan Forest Farm of Nehe City, ...Luseweilei is an easily-bursted microcapsule insecticide. A test of effectiveness of the insecticide to control the larvae of Dendrolimus superans T. was carried out in larch forest in Baoan Forest Farm of Nehe City, Heilongjiang Province, in April 2001. The solutions of different concentrations (1:150, 1:250, 1:350, and 1:450 Luseweilei : water) were sprayed on the larch trunk before the overwintering larvae climbing on trees and the spraying lengths (height) designed were 1.0, 2.5, and 3.5 m high from ground. The control result showed that spraying 150-, 250-, and 350-fold solutions of the insecticide all produced a good control result, with a mortality rate of 97%, but the 450-fold solution only produced 70% mortality. It is concluded that this insecticide can be used as a kind of good insecticide to control the overwintering larvae of D. superans in spring. Spraying 350-fold solution of easy-burst microcapsule insecticide and one meter spraying length are recommended for the future application..展开更多
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
The insecticidal efficacy of the diatomaceous earth against granary weevil, Sitophilus granarius L. （Coleoptera： Curculionidae）, with two essential oils for the degree of repellent activity, was evaluated in an exp...The insecticidal efficacy of the diatomaceous earth against granary weevil, Sitophilus granarius L. （Coleoptera： Curculionidae）, with two essential oils for the degree of repellent activity, was evaluated in an experimental model in laboratory tests. The diatomaceous earth was obtained from three Romanian sources （Patirlagele, Urloaia and Adamclisi） and was applied at four doses of 100, 300, 500 and 900 ppm （5, 15, 25 and 45 mg, respectively） on three replicates each variant. Mortality of S. granarius adults was estimated after 7, 14 and 21 d of exposure on treated grain. The insecticidal efficacy of the examined diatomaceous earth against the granary weevil was highly influenced by exposure time, dose and essential oil type. The longer exposure times increased weevil mortality in the case of low doses （100 ppm and 300 ppm）. After 60 d from the experiment initiation, the exposed grains from each variant were assessed about the progeny production. For the model proposed as bio-experiment, two essential oils in concentration of 80μL/L air and 125μL/L of Thymus vulgaris L. and Satureja hortensis L., respectively, were tested compared with untreated control in laboratory conditions. Both plant species belong to the family Lamiaceae, and the major active insecticidal compound was thymol among other providing to terpenoid class, such as eugenol and linalool. The species S. granarius chosen for experimental model was grown in the Research-Development Institute of Plant Protection （RDIPP） Bucharest bio-base. The results show that mortality induced from diatomaceous earth was at the level between 83.33% and 100% in all variants after 21 d, compared with untreated control and a standard product Silicosec.展开更多
基金Supported by Pesticide Innovation and Highly Efficient Implementation Technology of Special Foundation for Anhui Talents Development(13C1109)~~
文摘[Objective] The aim was to determine control effects of the 6 insecticides and recommended the optimal doses. [Method] In 2014, the control effects of sophocarpidine, pymetrozine, beta-cypermethrin, acetamiprid, imidacloprid, and chlor- pyrifos on wheat aphids were tested, and every pesticide was designed with three doses in Shou County, Anhui Province, to explore the significance of differences on control effects. [Result] The results showed that the control effects of the 6 insecti- cides were satisfied, and the insecticides were safe on wheat. [Conclusion] During initial diseasing stage of aphid, it is recommended to use sophocarpidine soluble concentrate （1.5%）, pymetrozine water dispersible granule （50%）, imidacloprid wet- table powder （25%）, and acetamiprid wettable powder （5%）, and chlorpyrifos missi- ble oil （40%）, cypermethrin missible oil （4.5%） and imidacloprid wettable powder （25%） can be applied in peak-diseasing stage.
文摘Luseweilei is an easily-bursted microcapsule insecticide. A test of effectiveness of the insecticide to control the larvae of Dendrolimus superans T. was carried out in larch forest in Baoan Forest Farm of Nehe City, Heilongjiang Province, in April 2001. The solutions of different concentrations (1:150, 1:250, 1:350, and 1:450 Luseweilei : water) were sprayed on the larch trunk before the overwintering larvae climbing on trees and the spraying lengths (height) designed were 1.0, 2.5, and 3.5 m high from ground. The control result showed that spraying 150-, 250-, and 350-fold solutions of the insecticide all produced a good control result, with a mortality rate of 97%, but the 450-fold solution only produced 70% mortality. It is concluded that this insecticide can be used as a kind of good insecticide to control the overwintering larvae of D. superans in spring. Spraying 350-fold solution of easy-burst microcapsule insecticide and one meter spraying length are recommended for the future application..
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The insecticidal efficacy of the diatomaceous earth against granary weevil, Sitophilus granarius L. （Coleoptera： Curculionidae）, with two essential oils for the degree of repellent activity, was evaluated in an experimental model in laboratory tests. The diatomaceous earth was obtained from three Romanian sources （Patirlagele, Urloaia and Adamclisi） and was applied at four doses of 100, 300, 500 and 900 ppm （5, 15, 25 and 45 mg, respectively） on three replicates each variant. Mortality of S. granarius adults was estimated after 7, 14 and 21 d of exposure on treated grain. The insecticidal efficacy of the examined diatomaceous earth against the granary weevil was highly influenced by exposure time, dose and essential oil type. The longer exposure times increased weevil mortality in the case of low doses （100 ppm and 300 ppm）. After 60 d from the experiment initiation, the exposed grains from each variant were assessed about the progeny production. For the model proposed as bio-experiment, two essential oils in concentration of 80μL/L air and 125μL/L of Thymus vulgaris L. and Satureja hortensis L., respectively, were tested compared with untreated control in laboratory conditions. Both plant species belong to the family Lamiaceae, and the major active insecticidal compound was thymol among other providing to terpenoid class, such as eugenol and linalool. The species S. granarius chosen for experimental model was grown in the Research-Development Institute of Plant Protection （RDIPP） Bucharest bio-base. The results show that mortality induced from diatomaceous earth was at the level between 83.33% and 100% in all variants after 21 d, compared with untreated control and a standard product Silicosec.
