| The　northwest　loess　plateau　apple　producing　area　is　the　new　and　developing　high　quality　apple　producing　area　of　our　country,which　is　one　of　the　most　excellent　living　area　to　fit　he　apple　on　seven　meteorological　phenomena　quota　in　the　world.　Among　them　Luochuan　is　in　northern　loess　plateau　of　Weibei,which　has　not　any　industry　pollution　and　is　the　important　apple　production　base　in　Shaanxi,the　apple　produced　is　not　only　toward　selling　to　internal　various　provinces,and　is　also　exported　to　Thailand,Singapore,Malaysia　and　Australia,　etc.　So　the　aspects　such　as　character　and　outcome　etc.　to　the　apple　possess　the　very　strict　requirement.　Therefore　that　the　place　must　does　not　have　the　public　hazard　and　fits　with　the　pesticide　in　apple　production.　So　it　has　the　fixed　requirement,such　as　when　to　using　the　pesticide,the　dosage　of　pesticide,what　kind　of　pesticide,etc.　　The design thought of this text is to built the monitoring system of main pests in non-harmful apple,applying some kinds of technologies on the monitoring and forecast,for examle,hanging the seduction of Asiatic apple leafminer,Peach fruit borer and Adoxophyes orana Fischer von Roslerstamm,setting up the black-light lamp in the orchard for inducing the moth,as well as regularly carry on race investigating in the orchard,etc. Knowing what pests happened in the apple and the trends,the capacity occurring is gone out in the statistics about the main pests,and to know other correlation factors of combination, such as meteorological factor,etc. Studying the occurrence regularity and the change trend of them, forecasting the change trends occur in the future. So,we can provide some reference opinions on prevention and cure in non-harmful apple for whole Luochuan district,raising under the premise of outcome and raising the fruit quality further. The initial research result is as follows: 1. In Luochuan district,the beginingof Asiatic apple leafminer is in late March,the peak occurrence is in July and September and the last phase of occurring is in late September and early Octorber,then the overwintering larvae begin to overwinter with pupae in fallen leaves. According to the overwintering generation happened in good order and quantity is fewer,it is the one of best periods for providing prevention ands cure . And the result is that the humidity and the capacity occurring have the positive correlation,the influence is the biggest. The regression equation from this built is y= 34894.111+811.75913x . 2. With the black-light lamp capacity trapping and killing the insect is 27744 altogether,including 8 orders of Insecta and Arachnida. The trapping and killing capacity of the main pests by black-light lamp to the apple like the Malacosma neustria testacea Motschulsky,Asiatic apple leafminer,Jinguizi,Leaf rollers,Aphid serve as 8,1330,650 and 135 and 474 respectively. To the major natural enemies of apple like the Chrysopa,the aphid fly eats,the ladybug,the ichneumon wasp,the trapping and killing capacity is 208,38 and 36 and 99 respectively. Through investigating,plant feeding habits pests surpassing the natural enemy insect far away in quantity. The relative fecundity of the pests and enemies is 10.19% and 1.38% respectively. Among the pests,the relative fecundity of the Leaf-miners is the highest,which is 4.91%, and the branch pests is the lowst, which is 0.45%. Among the enemies,the relative fecundity of the Chrysopa is the highest, which is 0.75%,and the Chun eating the pest is the lowst,for 1.08*10-6 % . 3. In Luochuan district,the capacity occurring of Peach fruit borer and Adoxophyes orana Fischer von Roslerstamm are not too many,harm not heavily,but we can not ignore to supervise them,we should strictly to observe them,the circumstances occurs,and guard against suffering from in coming . 4. The capacity occurring is not very big to the red spider all the year,summit phase only is 0.29 / leaf,far the action threshold for control .
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