Federal Institute of Education Science and Technology of Maranhão Campus Codó, Codó, Brazil.
Department of Agronomy - Entomology, Federal Rural University of Pernambuco, Recife, Brazil.
Pest Manag Sci. 2020 Nov;76(11):3770-3779. doi: 10.1002/ps.5926. Epub 2020 Jun 29.
Stored grain insects are controlled with fumigant insecticides which can select resistant insect populations and cause environmental and applicator contamination. Thus, resistant cultivars and chemical constituents of essential oils are an alternative to the almost exclusive use of these insecticides. The effects of the combination of cowpea cultivars Vigna unguiculata (L.) Walp. with chemical constituents of essential oils against Callosobruchus maculatus were determined. Four cowpea cultivars: BRS Tracuateua, BR 17 Gurgueia, Epace 10 and Sempre Verde (insect rearing) untreated were used in the experiments and combined with chemical constituents of essential oil: eugenol, geraniol and trans-anethole. The biological parameters observed were: total egg number and eggs per grain, egg viability (%), insects emerged and insects per grain, immature stage viability (%), instantaneous rate of growth (ri), insect dry weight (mg), grain weight loss (%) and egg-adult period.
When comparing all biological parameters, the cultivars BRS Tracuateua and BR 17 Gurgueia were harmful to C. maculatus. In the toxicity tests, the results showed that LC and LC of the chemical constituents ranged from 54.77 to 103.48 ppm and 60.99 to 125.18 ppm, respectively. In most of the biological parameters, LC had adverse effects significantly higher than LC and BR 17 Gurgueia treated were harmful to C. maculatus.
Overall, the findings showed that BR 17 Gurgueia combined with eugenol and geraniol more significantly affected the biological parameters of C. maculatus than when associated with trans-anethole, reducing egg number, insects emerged and egg viability. © 2020 Society of Chemical Industry.
储存谷物的昆虫通常使用熏蒸杀虫剂进行防治，这可能会选择具有抗性的昆虫种群，并导致环境污染和施药人员污染。因此，培育具有抗性的品种和使用植物精油的化学成分是替代几乎完全使用这些杀虫剂的一种方法。本研究旨在确定豇豆品种 Vigna unguiculata（L.）Walp.与精油化学成分联合防治斑蝽的效果。实验中使用了未经处理的 4 个豇豆品种：BRS Tracuateua、BR 17 Gurgueia、Epace 10 和 Sempre Verde（用于饲养昆虫），并与化学成分为：丁香酚、香叶醇和反式茴香脑的精油联合使用。观察到的生物学参数有：总产卵数和每粒卵的产卵数、卵的存活率（%）、成虫数和每粒卵的成虫数、未成熟阶段存活率（%）、瞬时增长率（ri）、昆虫干重（mg）、谷物失重（%）和卵-成虫期。
比较所有生物学参数，品种 BRS Tracuateua 和 BR 17 Gurgueia 对 C. maculatus 有危害性。毒性试验结果表明，化学成分为丁香酚和香叶醇的 LC 和 LC 分别为 54.77-103.48 ppm 和 60.99-125.18 ppm。在大多数生物学参数中，LC 的不利影响明显高于 LC，处理 BR 17 Gurgueia 对 C. maculatus 有害。
总体而言，研究结果表明，BR 17 Gurgueia 与丁香酚和香叶醇联合使用比与反式茴香脑联合使用时更显著地影响 C. maculatus 的生物学参数，减少了卵数、成虫数和卵的存活率。© 2020 英国化学学会。
