Movements Among Hosts And Control Technology Of Potosia Brevitarsis Lewis

Protaetia brevitarsis Lewis(Coleoptera Scarabaeidae Cetoniinae)is one of the important pests of crops and fruits in Xinjiang.The unique structure of agricultural and pastoral areas in Xinjiang,where livestock manure in pastoral areas provides an ideal breeding ground for the larvae of P.brevitarsis and fruit crops provide abundant food for adults in agricultural areas.P.brevitarsis can not only directly affect the feeding,but also easily produce secondary diseases such as sour rot,further affecting the yield of grapes And quality.The traditional ecological research methods and DNA molecular tracking technology were used to screen the research methods of the movements of P.brevitarsis in the hosts,identify the host plant species of P.brevitarsis,analyze the movements among different hosts,and carry out the research on the prevention and control technology of P.brevitarsis,so as to provide the theory basis and technical support for the comprehensive prevention of P.brevitarsis(1)Occurrence dynamics of P.brevitarsis in Turpan According to the investigation of odor attractant method,the adult of P.brevitarsis appear in the late May,an obvious peak was found in mid-June,then the population gradually decreased,and basically disappeared at the end of August.The final end date was the early October,and the damage was more than four months.(2)Screened and developed Investigation method for the population occurrence of P.brevitarsisIn order to definite the movements of P.brevitarsis among different hosts,three investigation methods(odour attractant method,system investigation method and DNA molecular tracking technology)were evaluated.It was found that odour attractant trapping method could reflect the quantity and growth rule of P.brevitarsis in tne field,but could not determine the real host;system investigation method could determine the real host,but could not represent amount of P.brevitarsis in the field,DNA molecular tracking technology can solve the disadvantages of the former two methods,and can be used to study the movements of P.brevitarsis among different hosts.(3)The host plant species of the adult of P.brevitarsis were determined in TurpanClonal sequencing technology identified 38 species,belonging to 37 genera,23 families,as host plants of P.brevitarsis in Turpan,which are Vitis vinifera,Morus alba,Humulus scandens,Ulmus pumila,Zea mays,Sophora japonica,Cyamopsis tetragonoloba,Lathyrus sativus,Prunus spinosa,Prunus armeniaca,Prunus perisica,Rosa arkansana,Rosa chinensis,Gossypium hirsutum,Althaea officinals,Populus hopeieusis,Salix paralesia,Solanum lyeopersicum,Elaeagnus angustifolia,Carya illinoinensis,Lactuca sativa,Citrullus lanatus,Cucumis melo,Ziziphus jujuba,Tamarix chinensis,Cynanchum sibiricum,Liriope spicata.The main host plant is Vitis vinifera,followed by the Prunus perisica.(4)The movements of P.brevitarsis in the area of fruits in Turpan was clarifiedDNA molecular tracking technology has definited the movements of P.brevitarsis among different hosts: in the first ten days of June,they feed on grapes,in the middle of June,some of them transfer to peaches and apricots;in the end of June to the beginning of July,some of them transfer to Elaeagnus angustifolia;in August,they only feed on grapes.(5)Control technology of P.brevitarsisThe effects of different positions,colors and types of traps on the trapping of the adults were tested.The results showed that: 1)there were more adults trapped in the traps 1 and 1.5 meters away from the ground and on the top of the grape shelf;2)there were more adults trapped outside the vineyard before grape ripening,but there were more adults trapped outside the vineyard during grape ripening period;3)the adults prefer red;4)more adults were trapped by new traps.(6)The effect of host species on the oviposition of P.brevitarsisThe effect of different hosts on the fecundity of P.brevitarsis showed that there was a difference in the oviposition amount among different hosts.In the early stage of breeding(June 21-27),the oviposition amount was the highest by the adults which were feeding tomatoes,reached the peak in the first and middle of July,the oviposition amount was the lowest by the adults which were feeding mulberry,and there was no significant difference in the oviposition amount by other hosts.