| Apriona swainsoni Hope(Coleoptera:Cerambycidae), is a serious pest of wood borer on Sophora. japonica Linn, an important trees species in China. The whole larval stage was spended in their host trees.Not only the larva damaged the xylem of the trees, but also the adult must feed on the bark for sexual mature which caused trees to die. It is one of China's quarantine pest, and caused our urban landscape and trees a major threat. To control this important pest, from 2009 the author studied the biological control techniques on Apriona swainsoni.This article study the biological characteristics and ecological characteristics of A. swainsoni . For control the pest its biology, ecology characteristics and biological control techniques were conducted. This paper studied clearly biological and ecological characteristics of the major pest A. swainsoni and studied the integrated control techniques based biological control. Including the techniques of yong A. swainsoni larva controled by Sclerodermus pupariae and S. harmandi, aged larva controled by Dastarcus helophoroides and A. swainsoni adult controled by Azadirachtin and Diflubenzuron. There was a well-established biological control techniques for every stage of the pest.The main results were as follows:1. The biological characteristics of A. swainsoni was studied indoor and outdoor, the result showed that the time of A. swainsoni adult emergence from late June until early October and the emergence peak in early July. The ratio of female to male was 1.45:1,and the fecundity of female was 27-62. There are 4 types and 8 kinds of sensilla on the antennae, distributing quantity of each type on scape, pedicel and each flagellomeres were also different2. The hatching peak of A. swainsoni eggs was form August 3 to August 10 and natural hatching rate was 92.68%. A mew species of parasitoid for A. swainsoni eggs was found for the first time, it belongs Trigonoderus and has good prospects for biological control.3. The spatial pattern of egg, larva and pupa or adult were all the aggregated distribution, 60.73% larva are centralized in the host tree trunks below 2.0 m. The sampling technique was study and provided the sequential sampling table for production reference 4. Sclerodermus pupariae and S. harmandi have better learning ability for the odor of frass and the host tree. The highest mortality and parasitic rate of S. pupariae to the young larva indoor was 100.00% and 80.00% respectively, and the relative control effect was 15.00% in field. The highest mortality and parasitization rate of S. harmandi to the young larva indoor was 100.00% and 62.22% respectively, and the relative control effect was 12.61% in field.5. Used Dastarcus helophoroide to A. swainsoni aged larvae and pupa in control.The parasitic effect was determination of Dastarcus helophoroides eggs and adults to A. swainsoni larva indoor, the result showed that the best parasitization rate were 60.00% and 86.11% respectively. The relative control effect after 30 days released D. helophoroides eggs and adults in field were 38.63% and 46.50% respectively, after 60 days were 38.63%和46.50% respectively. The control effect of D. helophoroides to A. swainsoni larva represented persistence. The spatial analyzed showed the spatial distribution patterns of A. swainsoni and D. helophoroides were consistent and niche similarity was very high. All showed the latter was spatially following the former.6. According to the complementary nutrition habits of A. swainsoni adults two kinds of environment safety pesticides were selected to control the pest. The effects of the insecticide azadirachtin on adult survival, antifeedant activity, oviposition and egg hatching were investigated. The results showed that all treatments with azadirachtin significant toxicity against A. swainsoni. When the concentration was dilute by 300-fold, 400-fold, 500-fold, 600-fold and 700-fold,the mortalities of the adults were 97.6%,86.0%,73.8%,50.0% and 36.1% within 6 days, respectively. The antifeedant activity enhanced accordingly with increasing and prolongation of concentration and time. the antifeeding rates of the treatments of 300-fold and 400-fold were 94.87%,90.22% within 6 days, respectively. The consumption of the branches was significant less than that in control. When the concentration was diluted by 500-fold,600-fold and 700-fold, the antifeeding rates of the beetle adults were 61.28%,41.54% and 37.00% within 6 day, respectively.The twigs of the S. japonica were treated by different concentration Diflubenzuron(DFB). The final results showed that there were no obvious difference for feeding amount and fecundity between treated groups and CK groups. However, there was significantly inhibition effect on the egg hatching, the most anti-hatching index was 76.32%. DFB of concentration 0.20mg/g was found to disturb growth and development of reproductive system of A. swainsoni adults.It caused a series lesions performance.
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