摘要
研究了用萝卜苗作桃蚜寄主植物繁殖烟蚜茧蜂的技术。结果表明 ,在温度 2 0~ 2 5℃、湿度 75 %的条件下 ,桃蚜的繁殖速度最快 ,1 0 d内即可获得大量的桃蚜。用不同虫龄的蚜虫接蜂 ,蚜龄越低寄生率越高 ;在不同温度中 ,2 5℃下寄生率最高。桃蚜的密度能影响烟蚜茧蜂的寄生率 ,密度在 1 0 0~ 2 0 0头时接蜂 1对 (雌∶雄 ) ,寄生率最高 ,可达 80 %。经连续 1 0代分别在不同蚜龄时繁蜂 ,虽然寄生率均随代数的增加而降低 ,但对低蚜龄时开始寄生的蚜茧蜂生长发育影响不大 ,其寄生率仍较其它蚜龄为高。在繁蜂室内用萝卜苗饲养桃蚜繁殖烟蚜茧蜂取得满意的结果。该技术设备简单 ,短期内可以获得较大量的烟蚜茧蜂 。
Method of using radish seedling as plant host to propagate peach aphid for mass rearing Aphidius gifuensis was studied in the laboratory. Results showed that the most favorable condition for the propagation of peach aphid was 20-25℃ and RH 70%. A. gifuensis prefered to oviposit on peach aphid of younger instars and the parasitization rate was also higher. 25℃ was the most favorable temperature for parasitizing. The host: parasite ratio could influence the parasitization rate. Best result was obtained when 100-200 aphids∶1 pair of parasite was used and 80% of the aphid could be parasitized. Continual rearing of A. gifuensis on peach aphid for 10 generations would decrease the parasitization rate of the aphid, but no distinct ill effect on the younger instar aphid was noted. Satisfactory results were obtained in a rearing room using radish seedling as plant host to propagate peach aphid for mass rearing A. gifuensis. Considerable amount of Aphidius wasp was obtained in a short period and used for the control of peach aphid.
出处
《中国生物防治》
CSCD
北大核心
2001年第2期49-52,共4页
Chinese Journal of Biological Control