不同寄主植物对三条橙灯蛾生长发育和繁殖的影响

Effects of different host plants on the development and fecundity ofLemyra alikangensis (Strand) (Lepidoptera: Arctiidae

苏超1,2**景军1,2王猛猛1方燕1,2李恺1,2

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作者单位：1. 华东师范大学生命科学学院上海200241； 2. 上海市城市)化生态过程与生态恢复重点实验室上海200062

中文关键词：三条橙灯蛾， 寄主植物， 生长发育， 营养效应， 取食选择

英文关键词：Lemyra alikangensis, host plant, development, nutrition effects, feeding choice

中文摘要：

 

    在室内条件（温度（26±1）℃，相对湿度80%，光周期12L∶12D）下研究了天仙果（Ficus erecta Thunb. var. beecheyana (Hook. et Arn.）King）、大青（Clerodendrum cyrtophyllum Turcz）、华东油柿（Diospyros oleiera Cheng）、喜树（Camptotheca acuminate Decne）和杨梅（Myrica rubra (Lour.) Sieb. et Zucc） 5种不同科的寄主植物对三条橙灯蛾Lemyra alikangensis (Strand)取食偏好、生长发育、繁殖及营养效应的影响。结果表明，三条橙灯蛾对不同寄主植物表现出明显的取食选择差异；不同寄主植物对三条橙灯蛾的幼虫发育历期、累计存活率、产卵量及营养效应等指标均有显著影响。三条橙灯蛾4龄幼虫偏好取食大青，对杨梅和喜树的选择率很低。幼虫历期以大青饲喂组最短为 （39.20±1.79） d，杨梅饲喂组最长为 (48.25±2.22） d；累计存活率以大青饲喂组最高（45.71%），杨梅饲喂组最低（28.57%）；大青饲喂组产卵量最多为 （5535±61.69） 粒/雌，杨梅饲喂组最少为 （386.25±51.05） 粒/雌。大青饲喂组三条橙灯蛾的相对生长率（0.30±0.03）mg·mg-1·d-1、食物利用率（13.46±1.84）%、近似消化率（62.04±6.29）%在各组中均最高，但食物转化率（21.65±0.95）%很低；杨梅饲喂组三条橙灯蛾的相对生长率（0.12±0.03）mg·mg-1·d-1、近似消化率（14.75±1.48）%很低，但是食物利用率（5.41±0.61）%较高，食物转化率（36.79±4.07）%最高。综合各指标认为：在5种供试植物中大青是三条橙灯蛾的最适寄主植物，杨梅则最不利于其生长发育和种群繁衍。

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英文摘要：      The effects of five host plants (Ficus erecta Thunb. var. beecheyana (Hook. et Arn.) King, Clerodendrum cyrtophyllum Turcz, Diospyros oleiera Cheng, Camptotheca acuminate Decne, Myrica rubra (Lour.) Sieb. et Zucc) on the development and fecundity of Lemyra alikangensis (Strand) (Lepidoptera: Arctiidae) were studied under laboratory conditions (26±1)℃, 80% RH and a photoperiod of 12L∶12D). The results show that there were significant differences in feeding preferences, larval period, total survival rate, egg number laid per female and nutrition effects among the larvae feeding on these different host plants. 4th instar larvae preferred Cl. cyrtophyllum, and did not like Ca. acuminata and M. rubra. Larvae that fed on Cl. cyrtophyllum had the shortest larval period (3920±179)d, the highest larvae survival rate (4571%) and the largest egg number laid per female (55375±6169). The longest larval period (4825±222)d, lowest total survival rate (2857%) and egg number per female (38625±5105) was observed in larvae feeding on M. rubra. In addition, the relative growth rate (RGR) (030±003)mg·mg-1·d-1, efficiency of conversion of ingested food (ECI) (1346±184)% and approximate digestibility (AD) (6204±629)% were all highest in larvae feeding on Cl. cyrtophyllum, but the efficiency of conversion of digested food (ECD) (2165±095)% was quite low. Larvae feeding on M. rubra had the lowest RGR (012±003)mg·mg-1·d-1 and AD (1475±148)%, but a relatively high ECI (541±061)%, and the highest ECD (3679±407)%. In conclusion, Cl. cyrtophyllum is the most suitable host plant for L. alikangensis and M. rubra the least suitable.

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