Screening Of Plants Osthol Compatibility

Plant pests has been a major problem in agricultural production. We want to find sustainable methods of plant pest and disease control based on early experiments in this study, selected 20 kinds of plant material for screening osthole synergist to improve the existing osthole prime product performance, improve control effect, and suitable for use in marketing. We use Helicoverpa armigera, Lipaphis erysimi, Sitophilus zeamais Motschulsky, Rhizopertha dominica Fabricius, Tribolium ferrugineum Fabricius, as test insects, and seed dressing with leaf dipping method from 20 species tested extracts of plant materials, obtained by more pronounced effect of plant extracts.Through screening, found that pharbitis seed, pricklyash peel, oleander flowers, Bodhisattva of ethanol extracts of four plants have good insecticidal activity, Pharbitidis which a marked effect on the diamondback moth, Pharbitidis the concentration of ethanol extract of crude extracts of 6.7 mL/100g raw medicinal herbs. The results showed that the most synergies for the pricklyash peel. pricklyash peel extracts to address the concentrations of single-dose treatment 2000mg.L-1 brassicae moth and 72h, the corrected mortality of the aphid food 97%, the corrected mortality of the diamondback moth in more than 88%; to address the concentration of 2000mg.L-1 as the correction of Sitophilus zeamais Motschulsky is also up to 92%. Osthol mixed with later, more obvious synergies, in particular the performance of the diamondback moth and storage pests in the prevention and treatment. Then carried out osthol pricklyash peel extracts and different ratio of the tested insects processing test results showed that pricklyash peel extracts and osthol when the volume ratio of 7:3, the synergism is obvious, a total of toxicity coefficient between 201～146, were more than 120. This ratio test is only completed in the laboratory, but also further expand the pilot-scale validation.pricklyash peel extracts of proteins were identified, eight components were isolated, and the eight components of the Helicoverpa armigera, Lipaphis erysimi, Sitophilus zeamais Motschulsky and other insect pests were Toxicity, The results show that the component 3, component 4, component 5, components 6 and 7 on the tested component to the death of insects, especially component 4 of the Insecticidal effect of the most significant concentration in the treatment 64μg.mL-1 processing moth, the death rate was 78.3%, on maize as the death rate is also 70%.