| Laspeyresia pomonella(L.)is a serious hazard in the world quarantine pests. At present,they have diffused to areas in Zhangye,Gansu province,which have caused grave threat to the country's fruit production.It is very important to pay more attention to effective prevention and treatment of Laspeyresia pomonella(L.)based on its regional ecology and biological characteristics.In this paper , Laspeyresia pomonella(L.) moth biology and ecology of the characteristics have been studied , and in accordance with integrated control experience of Laspeyresia pomonella(L.) in Zhangye ,Gansu province ,the integrated control mode has been summed up.1. The study of biological characteristics of Laspeyresia pomonella(L.)suggested that in the whole year ,there are two integrated generation and a incomplete generation in Zhangye,Gansu province. Generations overlapping is very serious. Overwintering adult began in late April and ended in mid-June; The first generation of Laspeyresia pomonella(L.) began in early May and ended in mid-August; Second generation began in early July and ended in early October; Third generation began in mid-August ,and by mid-September in late ,most third mature larvas have entered overwintering stage .The course of the development of Laspeyresia pomonella(L.) can be divided into nine phases,namely egg stage, larval stage (5 instar larvae), the aging larvae, pupa and adult stage. In the larval stage larval can be divided into five age according to the larvae molt and the distribution of body length.The first instar larvae,the length of body distributes between 1.443±0.084mm to 3.352±0.518mm;The body length of second instar larvas is between 3.352±0.518mm ~ 5.196±0.617mm;The body length of third instar larvas is between 5.196±0.617mm ~ 7.369±1.025mm; age 4 about 7.369±1.025mm ~ 10.913±0.948mm;age 5 about 10.913±0.948mm. indoor feeding study found that Apple coddling moth larvae mortality decreased with age. 2. The spatial distribution of Laspeyresia pomonella(L.) egg, larva, pupa have been studied in the paper,the study indicated that the eggs′spatial distribution in the apple toptree is aggregated distribution under the investigated density conditions,the eggs mainly distributed in the southeast direction of toptree. under the conditions of low-density (m <0.15), the spatial distribution of larvas is aggregated distribution,when m> 0.2 , the spatial distribution of larvas is even distribution.in the condition of investigated density, the pupa in the trunk are aggregated distribution. Overwintering pupae mainly distributed in the 0 cm from the ground-25cm section of the trunk, there was no significant distribution of Azimuth difference.The dynamic changes of the adult study indicated that overwintering adults are on the larger scale for a period in early May; The first generation of adults are on the larger scale for a period in mid-July;the second generation for the mid - to late August.by the end of september early adults gradually disappear.3.The adult dynamic monitoring of Laspeyresia pomonella(L.)is of important significance, there are obvious different efficiency among three types of pheromone traps in capturing adult codling month ,Laspeyresia pomonella(L.).By field experiment,it is indicated that the Delta sticky trap has the most efficient among the three types ,however ,between the water basin trap and the plastic bottle trap there are the same efficiency.In addition, integrated control of Laspeyresia pomonella(L.) achieved very significant results,so the integrated control mode has been made by the experience of integrated control in 2007 in Zhangye .
|
PDF Full Text Request