The small tomato borer Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae), is the most harmful tomato pest in the Neotropical region. Control of this insect is a complex task that relies heavily on the use of chemical products and the correct timing to target the initial developmental stages (eggs and larvae) before they penetrate the tomato fruits. Given the potential of plant-derived compounds for controlling pests, the first step of this study was to assess the insecticide activity of the aqueous extracts of Capsicum annuum L. (bell pepper), Allium sativum L. (garlic), Nicotiana tabacum L. (commercial rope tobacco), and the crude oil of Ricinus communis L. (castor bean) against N. elegantalis larvae. Here, it was reported that the commercial rope tobacco extract was promising against N. elegantalis larvae (up to 100% control), and the extracts of C. annuum, A. sativum, and R. communis presented very low insecticide activity (< 50% mortality). The rope tobacco extract was then selected to assess its effectiveness not only on eggs and the prepupal stage, but also on female oviposition behavior. Finally, the components of rope tobacco were assessed through phytochemical analysis. Our toxicological bioassays revealed ovicidal (LC₅₀ = 2.69 g/L) and larvicidal (LC₅₀ = 1.64 g/L) activity of tobacco extract. Furthermore, exposure to low tobacco extract concentrations (0.2 g/L) caused significantly decreased survival abilities of the prepupal stage, similar to indoxacarb insecticide (positive control). Tomato fruits previously treated with low concentrations (0.2 and 3.1 g/L) reduced the egg-laying performance of N. elegantalis in short-and long-term exposure. Chemical analysis of the tobacco rope extract revealed not only nicotine as the major component, but also the presence of phenolics, terpenoids, steroids, and other alkaloids. Collectively, our findings indicate that aqueous extract of rope tobacco shows biological activities in different developmental stages, including deterrent effects on N. elegantalis oviposition, which may position it as a promising tool to prevent pest attacks on tomato fruits.

小型番茄蛀虫Neoleucinodes Elegantalis（Guenée）（鳞翅目：Crombidae）是新热带地区最有害的番茄害虫。控制这种昆虫是一项复杂的任务，在很大程度上取决于化学产品的使用和正确的时机，以在它们进入番茄果实之前针对初始发育阶段（蛋和幼虫）。考虑到植物来源的化合物具有防治害虫的潜力，本研究的第一步是评估辣椒（甜椒），大蒜（大蒜），烟草（Nicotiana tabacum L. ）的水提物的杀虫活性。 （商品绳烟）和蓖麻（蓖麻籽）的原油对N. Elegantalis幼虫。在这里，据报道，商品绳索烟草提取物有望对抗优雅的猪笼草幼虫（高达100％的控制），而C. annuum，A。sativum和R. communis的提取物杀虫活性极低（<50死亡率百分比）。然后选择绳烟草提取物，以评估其不仅在鸡蛋和产前阶段，而且在女性排卵行为方面的有效性。最后，通过植物化学分析评估了绳烟草的成分。我们的毒理学生物测定显示杀卵剂（LC ₅₀  = 2.69 g / L）和杀幼虫剂（LC ₅₀ = 1.64 g / L）烟草提取物的活性。此外，与茚虫威杀虫剂（阳性对照）相似，暴露于低烟草提取物浓度（0.2 g / L）会导致pu前期的生存能力大大降低。以前用低浓度（0.2和3.1 g / L）处理过的番茄果实在短期和长期暴露下会降低elegant草的产卵性能。烟丝提取物的化学分析表明，烟碱不仅是主要成分，而且还存在酚类，萜类，类固醇和其他生物碱。总的来说，我们的研究结果表明，绳索烟草的水提物在不同的发育阶段显示出生物活性，包括对N. Elegantalis的威慑作用。 产卵，可能将其定位为防止害虫侵害番茄果实的有前途的工具。