Studies On Occurrence And Green Control Technique Of The Major Pests On Rice In Guangde Region

Beacause of restrictions of research techniques and less information about pests, study on sustainable control technology against major pests of rice has not been carried out in Guangde County. In this thesis, the key factor of rice major pest occurrence was conducted. Meanwhile, green control techinique against rice pests was built based on this research. This study has important significance in revealing the mechanism of major rice pest hazards of Guangde County, building the proper scientifically sustainable rice pest management, and promoting original innovation and integrated innovation abilites in pest control.Major rice pests in Guangde were leafroller, borer, inferens, small brown planthopper, white-backed planthopper, brown planthopper. Cnaphalocrocis medinalis began to move in Guangde County in mid-June,2^nd generation moved in and caused major damage in early July. The peak day of emergence of overwintering generation of Chilo suppressalis was in May. The generation was variated from the incomplete third-generation to the complete three generations. All of the generations of C. suppressalis occurred seriously. The major immigration peak of Sogatella fureifera was in late June to early July. The 2^nd generation occurred seriously.1st and 2^nd generation of Nilaparvata lugens moved in Guangde County and the 3rd outbreaked. The main predators of rice Guangde County were Erigonidium spider, Pirata spp., green-winged paederus, ladybug red rice, Trichogramma, frogs and the like.The results of anti-pest assay showed that: 1?FengLiangYou No.4 of rice showed the strongest resistances to C. medinalis; XingLiangYou No.6 had the most resistant to S. fureifera; LiangYouHua No.6 rice was the most resistant to rice brown planthopper. 2?Light trap No.1 showed relatively good trapping effect on Lepidoptera and Orthoptera insects; No.3?light trap trapping effect of Homoptera insects is relatively good; 3?ZhongJie NO.11 Bait equiped in ship trap captured the most adult stem borers among treatment, which are 530 during the test.4?This method showed the best attracting effect on borers. Stem borer, leaf roller, brown planthopper, white-backed planthopper are very few from transplanting to early tillering, and Erigonidium spiders, tarantulas and water spider crab quasi are very little too. As C. medinalis, brown planthopper, white-backed planthopper immigrating, which providing rich food sources for spiders, the number of Pirata and spider crab increased significantly.5?Trichogrammas were released on the beginning peak of borer moth two generation and peak time, respectively. Another treatment, Trichogrammas were released on the beginning peak of borer moth two generation ?2 days?, peak time and 2 days after peak time, respectively. The control effect of these two treatments was 59.23%, 65.38%.20% avermectin·Triazophos EC 80ml/mu was sprayed in the outlet area of 800m Trichogramma release during egg hatching peak period, that's August 1 day, the control effect was 74.62%. Recommended safe chemicals for field spiders were fipronil bisamides and chlorantraniliprole.This research has established pest monitoring and early warning model, also has proposed a new approach and new methods of sustainable major rice pest control. This study also has developed, improved and proposed ecological control techniques in line with ecological safety requirements for food security and sustainable agricultural development, new biological control technical and chemical pesticide reduction and precise use of new technologies. The research has established suitable control techniques for the major pest of Guangde County rice-growing areas.