Population Dynamics Of The Main Pests And Natural Enemies And The Pests Control In Peach Orchard Intercropped With White Clover

The study was carried out,including the population dynamics of the main pests and natural enemies,the integrated pest management such as intercropp- ing with white clover,laying Jiaduo Frequency Trembler Destroy Pests Lam- p,spraying of environment-friendly insecticides on peach trees,peach bagg- ing in right time,mowing clover and so on,in order to find out the effects of pests control in peach orchard intercropped with clover.The main conclusions are as follows:1.Investigated of community structure of arthropods in MengYin count- y,ShanDong provence,the main pests and natural enemies in peaeh orchard are as follows:There are 76 species in the peach orchard intercropped with white clover,consist of 52 species of pests and 24 species of nature enemies.There are 47species in the conventional peaeh ocrhard,consist of 34 species of pests and 13 species of nature enemies.2.The population dynamics of the main pests in dieffrent peach orchards were investigated.Compared the population dynamics of PseudauIacaspis p- entagona Tagioni,Hyalopterus amygdali Blanchard,Myzuspersicae Sulzer, E- rythroneura sudra Distan and Lyonetia clerkella Hubn.The results indicated that there were significant differences(P<0.05)in the amount of the community. The population on density of the pests in the peaeh orehard intercropped with white clover was lower than that of the eonventional management peach orch- ard.3.The population dynamics of the main natural enemies in dieffrent peach orchards were investigated.Compared the population dynamics of Syr- phidae,Coccinellidae,Araneida and Chrysopidae,The results indicated that there were significant differences(P<0.05)in the amount of the community. The population on density of the natural enemies in the peaeh orehard intercropped with white clover was higher than that of the eonventional management peach orchard.The peach orchards intercropped with clover could observably improve the recovering and rebuding of functional of natural enemies.4.Investigated mowing effects on the insect community structure and d- ynamics of peach trees at peach orchards intercropped with clover.The results indicated that there were significant differences (P<0.05)in the amount of spe- cies of the community at four different peach orchards.The order is not mowi- ng,mowing once,mowing twice and not intercropped with clover.There were no significant differences (P<0.05)in the amount of species number of the co- mmunity at the peach orchard which mow twice and not intercropped with cl- over.We found out the influence of the population dynamics by mowing clov- er.The results indicated that mowing clover had deep affects on the species n- umber of nature enemies and the species number of neutral insects.5.The effects of laying Jiaduo Frequency Trembler Destroy Pests lamp was found.It trapped and killed 14 species of the main pests from May to June,most of which were Lyonetia prunifoliella Hubn,Acronicta incretata Hampson,Anomala corpulenta Motschulsky,Dichhocrocis punctiferalis Gue- née,Grapholitha molesta Busck and Adoxophyes orana Fisher.The peak amount was 103 Lyonetia prunifoliella Hubn in one night trapped and killed by 5 lamps.6.The peach orchard intercropped with clover could improves the reco- vering and rebuilding of the population of functional groups of natural ene- mies which had been severely reduced by spraying of the insecticides.The rate can reach 2.8 times in the two different peach orchards.7.Results of control by EmamectinBenzoateEC,AVEC,AcetamipridEC, PirimicarbWG and ImidaclopridWP to Myzuspersicae Sulzer showed positi- vly effects.Results of control by D–CTRON EC to PseudauIacaspis pentag- ona Tagioni were effective.Results of control by AVEC,MethoxyfenozideSC, Chlorbenzuron SC and DimethoSC were effective.8.The effects of peach bagging are 71.43%,effects of integration management to peach leaves is 80.17%,which is 1.95 times than conventional peaeh orchards.Effects of Integration management to peach fruits are 97.44%,which is 1.12 times than conventional peaeh orchards.Mensuration of pesticide residues of peach fruits is up to the request of safe crop.