Departamento de Ecologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Campus Samambaia, Caixa Postal 131, Goiânia, GO 74001-970, Brazil.
Exp Appl Acarol. 2012 Jan;56(1):57-68. doi: 10.1007/s10493-011-9494-9. Epub 2011 Oct 5.
The suitability of rubber tree clones to Calacarus heveae was inferred from the life cycle, reproduction and survivorship of this mite. The assays were performed under controlled conditions with leaflets detached from 6-year-old plants. The development of 20 C. heveae individuals on each of the clones GT 1, PB 235 and RRIM 600 was analysed. This experiment was performed four times during periods when C. heveae was abundant in the field: (P1) November-December 2005, (P2) January-February, (P3) March-April and (P4) May-June 2006. Accordingly, the leaflets used in each assay represented the physiological condition of the host plant during each period. This approach allowed us to evaluate the seasonal suitability of rubber tree clones to C. heveae. We observed seasonal differences in the suitability of rubber tree clones to mite attack. The mites reared on the PB235 had a shorter development period, the highest egg production and highest survivorship. This evidence showed that the PB 235 was the most suitable of those tested. We also observed that the leaflets used in the assays during periods P2 and P3 were the most favourable for the development of C. heveae. This finding emphasises the seasonal suitability of rubber tree leaflets. On the other hand, GT 1 showed higher resistance against C. heveae than did RRIM 600 and PB 235, primarily during the period from November to February. This result indicated that use of the GT 1 clone to control the mite might represent an alternative for growers.
从橡胶树爪螨的生命周期、繁殖和生存能力推断出橡胶树无性系对其的适宜性。该试验在受控条件下进行，所用叶片取自 6 年生植株。在每个 GT1、PB235 和 RRIM600 无性系上分析了 20 只 C. heveae 个体的发育情况。本试验在田间 C. heveae 大量出现的四个时期进行：（P1）2005 年 11 月至 12 月，（P2）1 月至 2 月，（P3）3 月至 4 月和（P4）2006 年 5 月至 6 月。因此，每次试验所用的叶片代表了宿主植物在每个时期的生理状况。这种方法可以评估橡胶树无性系对 C. heveae 的季节性适宜性。我们观察到橡胶树无性系对螨虫攻击的适宜性存在季节性差异。在 PB235 上饲养的螨虫发育周期较短，产卵量最高，存活率最高。这表明 PB235 是所有测试中最适宜的。我们还观察到，在 P2 和 P3 时期进行的试验中所用的叶片最有利于 C. heveae 的发育。这一发现强调了橡胶树叶片的季节性适宜性。另一方面，GT1 比 RRIM600 和 PB235 对 C. heveae 的抗性更高，主要是在 11 月至 2 月期间。这一结果表明，使用 GT1 无性系来控制螨虫可能是种植者的一种选择。
