3 results about "Laodelphax striatella" patented technology

The application discloses a method for regulating virus proliferation in rice planthopper. The method regulates the content of 3,5-bisphospho phosphatidylinositol (PI(3,5)P2) to regulate the proliferation of rice black-streaked dwarf virus in the body of Laodelphax striatellus and southern rice black-streaked dwarf virus in the body of white-backed planthopper. The PI(3,5)P2 inhibitor or dsRNA of PI(3,5)P2 synthesis enzyme gene PIKfyve is applied by microinjection, drop or spraying to reduce the content of PI(3,5)P2 in the body of Laodelphax striatellus and white-backed planthopper, thereby inhibiting the proliferation of rice black-streaked dwarf virus in the body of Laodelphax striatellus and southern rice black-streaked dwarf virus in the body of white-backed planthopper. The PI(3,5)P2 homolog PI(3,5)P2-diC8 is applied to Laodelphax striatellus to increase the content of PI(3,5)P2, thereby promoting the proliferation of rice black-streaked dwarf virus in the body of Laodelphax striatellus. The application provides a new method for controlling virus diseases transmitted by vector insects.

The application provides a Laodelphax striatellus juvenile hormone synthesis gene LsFAMeT and application thereof in biological control of the Laodelphax striatellus, and the LsFAMeT gene can be targetedly inhibited to significantly inhibit the oviposition of female adults, thereby controlling the population of the Laodelphax striatellus and reducing the damage of the Laodelphax striatellus to grain crops. The dsRNA or interference reagent is prepared by transcription of the LsFAMeT gene, and the oviposition of female adults of the Laodelphax striatellus can be effectively inhibited after the reagent is injected into the Laodelphax striatellus, so that the biological control of the Laodelphax striatellus is realized. The biological method is used for the control of the Laodelphax striatellus, and is safe and harmless to the environment and food, thereby providing a new strategy for green control of the Laodelphax striatellus.

The present invention belongs to the technical field of pesticides, and specifically relates to a triazole compound and a preparation method therefor, and an insecticidal composition and the use thereof. The compound is as represented by general formula I, where X represents CR11 or N; X2 represents CR2 or N; W represents O or S; R1, R2, R3, R4, R5, R6, R7, R9 and R11 each independently represents hydrogen, halogen, alkyl, etc.; R8 represents hydrogen, alkyl, alkenyl, alkynyl, etc.; and R10 represents hydrogen, alkyl, alkenyl, alkynyl, etc. The compound exhibits a good control effect on Nilaparvata lugens, Rhopalosiphum padi, Laodelphax striatellus, Sogatella furcifera, Myzus persicae, Aphis craccivora, etc.