The present study was carried out to unveil interactive relevance among consecutive and alternate members of a tritrophic system comprised of sugar beet genotypes, beet armyworm, Spodoptera exigua (Hübner), and its parasitoid, Habrobracon hebetor (Say) using demographic parameters. To do so, H. hebetor was reared on S. exigua fed on 10 sugar beet genotypes, including SB26; SB27; SB29; SB33; SB34; (7112*SB36)*Sh-1-HSF-5; FC220; FC301; SBSI006; and HM 1339RZ in a growth chamber at 25 ± 1 °C, 60 ± 5% RH, and 16:8 (L: D) h photoperiod. The data was analyzed based on the age-stage, two-sex life table theory. Our results revealed high variation in duration of different life stages of H. hebetor on S. exigua reared on different sugar beet genotypes examined. The shortest (10.605 days) and longest (13.721 days) pre-adult period of H. hebetor was on S. exigua reared on SB26 and SB34, respectively. The longest (17.2 days) and shortest adult longevity (7.5 days) was on S. exigua reared on SB26 and SB27, respectively. The highest values of the intrinsic rate of increase (r) (0.209 day−1) and finite rate of increase (λ) (1.233 day−1) were observed on S. exigua reared on SB34 and their lowest values (0.159 and 1.172 day−1, respectively) were recorded on SB27. Resistant and susceptible genotypes to S. exigua, FC301 and (7112*SB36)*Sh-1-HSF-5, respectively, were only genotypes on which H. hebetor had greater and approximately equal r compared with S. exigua. This finding indicates high capability of H. hebetor to be successfully employed against S. exigua on sugar beet genotypes which are extremely different in resistance to this pest.

中文翻译：

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不同甜菜基因型饲养的甜菜夜蛾科(Spodoptera exigua (Noctuidae)) 年龄阶段、两性生活表

本研究旨在揭示由甜菜基因型、甜菜粘虫、草地贪夜蛾(Hübner) 及其寄生蜂，哈布罗贝托（说）使用人口统计参数。为此，H. hebetor饲养于西瓜以 10 种甜菜基因型为食，包括 SB26；SB27；SB29; SB33; SB34; (7112*SB36)*Sh-1-HSF-5；FC220；FC301；SBSI006; 和 HM 1339RZ 在 25 ± 1 °C、60 ± 5% RH 和 16:8 (L: D) h 光周期的生长室中。数据分析基于年龄阶段，两性生活表理论。我们的结果表明，不同生命阶段的持续时间差异很大H. hebetor在西瓜在不同的甜菜基因型上饲养。最短（10.605天）和最长（13.721天）的成年前时期H. hebetor开启西瓜分别在 SB26 和 SB34 上饲养。最长（17.2 天）和最短的成年寿命（7.5 天）开启西瓜分别在 SB26 和 SB27 上饲养。内在增长率的最高值 (r) (0.209 天-1) 和有限的增长率 (λ) (1.233 天-1) 观察到西瓜饲养在 SB34 和它们的最低值 (0.159 和 1.172 天-1, 分别) 记录在 SB27 上。抗性和易感基因型西瓜、FC301 和 (7112*SB36)*Sh-1-HSF-5 分别是H. hebetor有更大和大致相等r和....相比西瓜. 这一发现表明高能力H. hebetor成功地被用来对付西瓜对这种害虫的抗性极为不同的甜菜基因型。