2results about How to "Containment hazard" patented technology

The invention discloses a sex attractant for yellow rice borers as well as a preparation method and application of the sex attractant, and relates to the technical field of agricultural pest monitoring, prevention and control. The sex attractant comprises an active component which is prepared from (Z)-dodecyl-9-ene-1-yl acetate, (E)-dodecyl-9, 11-diene-1-yl acetate and (7E, 9Z)-dodecyl-7, 9-diene-1-yl acetate, and the sex attractant is prepared from an active component which is prepared from the following components of (Z)-dodecyl-9-ene-1-yl acetate, (E)-dodecyl-9, 11-diene-1-yl acetate and (7E, 9Z)- According to the sex attractant disclosed by the invention, aiming at the current sugarcane area dominant population, the three active components have a synergistic effect, so that the trapping activity of the current sugarcane area dominant population is remarkably improved, and the problems that the trapping activity is low and the specificity is poor due to the fact that a control object is not matched with the dominant population in the existing sex attractant product are solved. Field trials show that the trapping quantity of the sex attractant provided by the invention on the yellow rice borers is obviously higher than that of a control group, the sex attractant has extremely high population specificity, and accurate monitoring and efficient trapping and killing of yellow rice borer populations can be realized.

The application relates to the technical field of check valves, in particular to a low-resistance forged steel check valve. The low-resistance forged steel check valve is provided with a screw rod type pressure regulating assembly driven by a motor, can electrically and accurately regulate the acting force of a spring on a linkage assembly and a valve plate, and can dynamically set and change the opening pressure threshold value of the valve. The design makes the check valve actively adapt to different pipeline system pressure working conditions and flow requirements, instead of only having a fixed response value like a traditional check valve, and the intelligent degree is high; the low-resistance smooth opening under normal low pressure can be ensured; the overall structure is compact and reasonable; and through detachable connection design of a top cover, when internal core components such as the motor and the pressure regulating assembly are maintained or overhauled, the entire valve does not need to be detached from the pipeline, and only the top cover needs to be detached, so that the daily maintenance and care of the equipment are greatly facilitated, and the difficulty and cost of later operation and maintenance are reduced.