Impact of planting and harvest dates on yam infestation by white grubs

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY
Romain Exilien, Robers Pierre Tescar, Holken Augustin, Dorensky Cadestin, Nicolas Carvil, Predner Duvivier, Gelin Doreus, Jessi Griesheimer
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引用次数: 0

Abstract

The white grub, Diaprepes abbreviatus L. (Coleoptera: Curculionidae), is a significant pest of yam tubers and the second cause of tuber rot in Haiti. Larval feeding inflicts severe damage to tubers, leading to notable losses due to decreased tuber quality, reduced marketability and increased susceptibility to secondary parasites and pathogens. This study examined the influence of planting and harvesting dates on the vulnerability of yam tubers to white grub infestation and the resulting tuber quality across 24 farmers' fields. At harvest, we assessed the level of tuber infestation, white grub density and the tuber quality index. The results indicated that 85% of grub populations were found in fields planted on the traditional date. In addition, 69.5% of tuber damage occurred in early‐planted fields with fewer tubers damaged (30%) when harvested early. In contrast, in fields planted 30 days after the traditional date, the harvest date did not affect tuber infestation and damage by the pest. Overall, both planting and harvest dates impacted the quality grade of yam tubers. Delayed planting by 30 days and early harvesting (34th–38th week after planting) improved the marketability of yams. These findings highlight the importance of optimising planting and harvest schedules to better manage white grub infestation and enhance the marketability of yam tubers.
种植和收获日期对白蛴螬侵扰山药的影响
白蛴螬 Diaprepes abbreviatus L.(鞘翅目:蝼蛄)是海地山药块茎的主要害虫,也是造成块茎腐烂的第二大原因。幼虫取食对块茎造成严重破坏,导致块茎质量下降、适销性降低以及对次生寄生虫和病原体的易感性增加,造成显著损失。本研究考察了种植和收获日期对山药块茎易受白蛴螬侵袭的影响,以及 24 个农户的块茎质量。收获时,我们评估了块茎虫害程度、白蛴螬密度和块茎质量指数。结果表明,在传统种植日期种植的田块中发现了 85% 的蛴螬种群。此外,69.5%的块茎损害发生在早种的田块中,早收时受损的块茎较少(30%)。相比之下,在传统日期后 30 天种植的田块中,收获日期并不影响害虫对块茎的侵扰和破坏。总的来说,种植和收获日期都会影响山药块茎的质量等级。推迟 30 天种植和提早收获(种植后第 34-38 周)提高了山药的适销性。这些发现强调了优化种植和收获时间的重要性,以更好地管理白蛴螬虫害并提高山药块茎的适销性。
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来源期刊
CiteScore
3.40
自引率
5.30%
发文量
132
审稿时长
6 months
期刊介绍: The Journal of Applied Entomology publishes original articles on current research in applied entomology, including mites and spiders in terrestrial ecosystems. Submit your next manuscript for rapid publication: the average time is currently 6 months from submission to publication. With Journal of Applied Entomology''s dynamic article-by-article publication process, Early View, fully peer-reviewed and type-set articles are published online as soon as they complete, without waiting for full issue compilation.
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