| Apocheima cinerarius Erschoff(Lepidoptera,geometridae)has a wide distribution in Beijing,and it harms poplar,eucalyptus,willow,populus and other trees by chewing leaves.In severe cases,it will eat light and pruning leaves,greatly weakening the tree potential,affecting the growth and development of the plants,causing the shoots of host plants to wither,and causing the death of large-scale trees.In view of this,this paper firstly studied the adult emergence period and the trend of the period of the A.cinerarius based on the law of temperature change in Beijing from 2000 to 2018.Then,according to the life history and developmental characteristics of A.cinerarius in Beijing,The control experiments of A.cinerarius with different material tape type,different width tape and different trap suspension height were carried out respectively.Finally,according to the results,the best pollution-free prevention and control measures for controlling this looper were screened out to provide a theoretical basis for the realization of precision and green prevention and control of A.cinerarius in Beijing.The main results are as follows:(1)Since the beginning of the 21st century,the temperature in Beijing has shown a clear upward trend,with the annual average temperature and the annual average minimum temperature rising significantly.Subsequently,the results of the correlation analysis between the emergence period and the temperature of A.cinerarius showed that the beginning date of the emergence of A.cinerarius in Beijing area is significantly advanced with the increase of temperature,and the end date of the emergence of A.cinerarius is also significantly advanced with the increase of temperature.(2)Blocking experiment on A.cinerarius with different material tape types:two poplar forests in Daxing and Tongzhou districts of Beijing were selected as standard plots.The tape blocking experiments were carried out by using five types of tapes,i.e.ordinary tape(non-degradable),one-sided degradable tape,two-sided degradable tape,paper tape and kraft paper tape.The results showed that the barrier effect of ordinary,single-sided degradation and double-sided degradation tape was much higher than that of kraft paper and paper tape.The average barrier values of single-sided degradation tape and double-sided degradation tape were 85.55%and 81.55%,respectively and the difference was significant.Since the ordinary tape is not degradable,in the end,the single-sided degradation tape was considered as the best barrier material among the five materials from the point of view of economy and environmental protection.(3)Circumferential blocking test of A.cinerarius different widths of tape:In the standard plots of Daxing District and Tongzhou District of Beijing,four-sided degraded material tapes with four width gradients(10cm,15cm,20cm and 25cm)were used to conduct circumferential blocking test on the spring scorpion.The results showed that the barrier effect of single-sided degradation tape with width of 25cm and 20cm was better than that of the other two widths in the two plots.The results of variance analysis were significant.Finally,combined with cost factors,the optimal width of one-sided degradation tape is recommended to be 25cm.(4)Preventive and control experiments of A.cinerarius traps of different heights:preventive and control experiments of A.cinerarius carried out with traps of different heights(1.5m and 1m).The results showed that the trapping effect of 1.5m suspension height was significantly higher than that of lm suspension height.(5)Control experiment of A.cinerarius with different traps and lures:the traps and lures provided by Beijing Zhongjie Sifang Biotechnology Co.,Ltd and Beijing Green Biyuan Technology Co.,Ltd were selected to control.The results show that the seduction effect of Beijing Zhongjie Sifang Biotechnology Co.,Ltd is slightly higher than that of the traps and lures provided by Beijing Green biyuan Technology Co.,Ltd. |
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