Studies On The Damage And Control Of Batocera Horsfieldi(hope)to Fraxinus Chinensis Roxb In Linyi,Shandong Province

In recent years,Batocera horsfieldi Hope become more and more harmful to trees in Linyi City,especially on Fraxinus chinensis Roxb.The larvae eat at the fork of tree's root and trunk,causing damage to the root of trees.The hollow part often causes "wind breaking" of trees,which results in the death of trees and affects the landscape effect and economic function.Therefore,investigating the occurrence regularity and harmfulness status of Batocera horsfieldi on Fraxinus chinensis in Linyi area,further studying the integrated control measures of this pest and selecting high-efficiency and low-toxicity pest control technology are conducive to reducing the cost of pesticide application,improving the efficiency of protection and protecting the ecological environment in the urban greening work of Linyi area.In this study,the number of excretory holes and emergent holes of Batocera horsfieldi on Fraxinus chinensis in urban green belts of Lanshan District was investigated by random sampling method and whole-piece sampling method,based on Lanshan green belts and the Fraxinus chinensis in nursery of Luozhuang District of Linyi City,and the initial occurrence period and peak phase and generations of the insect were monitored.By observing the development period of larvae and adults,and observing whether there are wormholes and the number of wormholes on the trunk of trees,calculating the rate of damaged plants,determining the damage grade,the occurrence regularity and damage situation of Lonicera yunnanensis in Linyi area were clarified.Spray the Fraxinus chinensis by 8% contact broken microcapsule suspension to kill the adults,which containing 0.25%,0.33% and 0.5% concentration.Using the covering net method and the ground investigation method to investigate the adult number of poisoned adults during the period of adult emergence,calculate the mortality rate.It is known that the8% contact broken microcapsule suspension has a good killing effect on the adults of the white waxy spotted beetle.The use of 8% contact broken microcapsule suspension 400 times liquid can prevent 92.6% of the adults of the white spotted white beetle,and the control effect is better.The control effection on larvae was studied by using 6 kinds of truck injection medicine:15% imidacloprid-dichlorvos injection,4% imidacloprid-avermectin injection,4.5%imidacloprid injection,10% acetamiprid injection,30% dichlorvos-oxyle injection and 20%chlorobenzamide injection.Six kinds of injection medicine all had certain control effects on the larvae,15% imidacloprid-dichlorvos injection has the best effection,at the same time,30% dichlorvos-oxalos is the second.The parasitic effection was studied by releasing egg cards and adults of Dastarcus helophoroides(Fairmaire).According to the investigation,the control effect of releasing egg cards is better than releasing adults in the outdoor experimental environment.When releasing adult velvet beetles,the survival rate is more susceptible to adverse external factors than placing velvet eggs cards.At the same time,the cost of artificial propagation is much higher than that of eggs.Therefore,it is more economical,practical and feasible to use the method of placing velvet eggs card in large-scale control of longicorn mottled beetle in production.The control effection of two kinds of sugar and vinegar solution was compared to study trapping adults.According to the study,the sugar and vinegar solution has a certain effect on killing adults of Batocera horsfieldi,at the same time,the sugary and vinegar solution I is better than the sugary and vinegar solution II.However,this method is susceptible to interference from external environmental factors,such as human flow and traffic flow in nursery.It is feasible to apply in small areas,but it is not suitable for large-scale application in old urban areas where Fraxinus chinensis is used as roadside tree.After the final research and analysis,a set of integrated control methods for Linyi area worked out.It contains safe and Effective chemical control mainy,supplemented by biological control and physical control.It providing theoretical support for the sustainable development of local garden pest control and landscaping.