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首页> 外文期刊>Journal of forest research >A trial to detect optimal pin-pricking timing in evaluating the ability to form traumatic resin canals of Cryptomeria japonica for selecting resistant trees to Semanotus japonicus (Coleoptera: Cerambycidae)
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A trial to detect optimal pin-pricking timing in evaluating the ability to form traumatic resin canals of Cryptomeria japonica for selecting resistant trees to Semanotus japonicus (Coleoptera: Cerambycidae)

机译：在评估日本柳杉创伤性树脂渠道形成能力以选择对日本夜蛾的抗性树的能力时，检测最佳插针时机的试验（鞘翅目：天蛾科）

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A trial to detect optimal pin-pricking timing in evaluating the ability to form traumatic resin canals (TRCs) of Cryptomeria japonica was examined to select resistant trees to Semanotus japonicus using 14 clones in 2001 and 2002. Resistance to S. japonicus and the ability to form TRCs in the phloem was evaluated by inoculating newly hatched larvae in the bark and by a pin prick, which was conducted every 10 days (four times) on the trunk around the larval phloem-feeding period, respectively. The larval survivorship varied greatly among clones for both years. The mean appearance of newly formed TRCs was generally higher in late treatment for both years, and the tangential width of them was also higher in 2001, whereas those of pre-formed TRCs were not higher for either year. The larval survivorship did not show significant correlations with the appearance and the width of pre-formed TRCs on all treatments. However, it showed significant negative correlations with the appearance of newly formed TRCs on the second and third treatments on the 2-year-old layer, although this was not significant with the width of them. This suggests that resistant clones might have the mechanism of rapidly forming TRCs when just at the stage of newly hatched larval entering the phloem. Thus, although the relationship between the appearance and the width of newly formed TRCs is not clear, pin-pricking treatment when the newly hatched larvae just enter the bark may be one of optimal times for the evaluation of the resistance of C. japonica to S. japonicus.
机译：在2001年和2002年，使用14个无性系进行了一项试验，以检测最佳的插针时机，以评估日本柳杉的创伤性树脂运河（TRC）的形成能力，以选择抗日本柳卷柏的树。通过接种树皮中新孵出的幼虫并用针刺法对韧皮部中的TRCs进行评估，分别在幼虫韧皮部喂养期左右的树干上每10天（四次）进行针刺。两年间，幼虫在不同克隆中的存活率差异很大。新形成的TRC的平均外观在这两个年份的后期处理中通常都较高，并且它们的切向宽度在2001年也较高，而预先形成的TRC的切向宽度在任何一年都不高。在所有处理中，幼虫的存活率与预先形成的TRC的外观和宽度没有显着相关。然而，它与2岁层第二和第三次处理中新形成的TRC的外观显示出显着的负相关性，尽管这与它们的宽度无关。这表明当刚孵出的幼虫进入韧皮部时，抗性克隆可能具有快速形成TRC的机制。因此，尽管不清楚新形成的TRC的外观与宽度之间的关系，但是当刚孵出的幼虫刚进入树皮时进行针刺处理可能是评估日本粳稻对S的抗性的最佳时间之一。日本

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