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Effect of Moisture Stress on the Development of False Codling Moth Thaumatotibia leucotreta (Lepidoptera: Tortricidae) on Two Tomato Varieties
Neotropical Entomology ( IF 1.8 ) Pub Date : 2021-08-18 , DOI: 10.1007/s13744-021-00904-z
Esther Museo Patrick 1 , Irene Koomen 2 , Shepard Ndlela 3 , John Mwibanda Wesonga 1
Affiliation  

False codling moth Thaumatotibia leucotreta (Meyrick) is a pest native to sub-Saharan Africa infesting over 100 plant species including tomato. Its survival and performance are influenced by changes in precipitation and stress-related biochemical changes in the host plant. Water availability for agricultural production continues to decline due to climate change affecting drought-sensitive crops like tomatoes. Little is known on host plant–insect interactions of T. leucotreta and tomato as influenced by moisture stress. Hence, our study tested the impact of different water holding capacities (WHC) (40%, 50%, 60%, 70%, and 90%) of plant growing media on the growth of Anna F1 and Yaye tomato varieties and the infestation rate and development of T. leucotreta on the two varieties. WHC significantly influenced the growth of Anna F1 and Yaye tomato varieties. WHC significantly affected stem girth of Anna F1 variety and leaf length, leaf width, stem girth, and plant height of the Yaye variety. For Yaye variety, T. leucotreta laid a significantly high number of eggs when grown at 70% WHC and had the highest pupation when grown at 60% WHC. The development of T. leucotreta as observed on wing growth was highest at 40% and 50% WHC for both Anna F1 variety and Yaye variety. Our study shows that the infestation of tomato by T. leucotreta is likely to be high when grown in water-scarce media. The results are useful for predicting possible future T. leucotreta trends with increasing water scarcity due to climate change and in designing pest management programmes.



中文翻译:

水分胁迫对两个番茄品种假苹果蠹蛾Thaumatotibia leucotreta(鳞翅目:Tortricidae)发育的影响

假苹果蠹蛾Thaumatotibia leucotreta (Meyrick) 是一种原产于撒哈拉以南非洲的害虫,可侵染包括番茄在内的 100 多种植物。其存活和性能受寄主植物中降水变化和与胁迫相关的生化变化的影响。由于气候变化影响了西红柿等对干旱敏感的作物,农业生产的可用水量继续下降。关于受水分胁迫影响的T. leucotreta和番茄的宿主植物-昆虫相互作用知之甚少。因此,我们的研究测试了植物生长介质的不同持水能力 (WHC)(40%、50%、60%、70% 和 90%)对 Anna F1 和 Yaye 番茄品种的生长和侵染率的影响T. leucotreta 的发展和发展在这两个品种上。WHC 显着影响了 Anna F1 和 Yaye 番茄品种的生长。WHC 显着影响 Anna F1 品种的茎周长和 Yaye 品种的叶长、叶宽、茎周长和株高。对于Yaye品种,T. leucotreta在 70% WHC 生长时产卵数量显着增加,在 60% WHC 生长时具有最高的化蛹。T的发展。对于 Anna F1 品种和Yaye 品种,在翅膀生长中观察到的leucotreta在 WHC 的 40% 和 50% 时最高。我们的研究表明,在缺水培养基中生长时,T. leucotreta对番茄的侵染可能很高。结果可用于预测未来可能的T. leucotreta 由于气候变化和设计害虫管理计划而导致水资源短缺的趋势。

更新日期:2021-08-19
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