Laboratorio de Zoología de Invertebrados II, Dpto de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan, Bahía Blanca, Argentina.
Pest Manag Sci. 2011 Jun;67(6):639-46. doi: 10.1002/ps.2102. Epub 2011 Mar 1.
The composition and bioactivity of essential oils from Tagetes terniflora Kunth, Cymbopogon citratus Stapf. and Elyonurus muticus (Spreng) Kuntz were evaluated against stored-grain pests.
Fumigant and contact toxicities were observed with T. terniflora on adults of both pests. In contact toxicity, this oil was less toxic to Tribolium castaneum (Herbst). Essential oils from C. citratus and E. muticus showed contact toxicity on S. oryzae. All essential oils produced: (a) repellency on larvae and adults of T. castaneum and adults of Sitophilus oryzae (L.); (b) post-ingestive toxicity on T. castaneum larvae and S. oryzae adults and alteration of nutritional index on T. castaneum and S. oryzae adults. Cymbopogon citratus reduced the relative growth rate and the efficiency of conversion of ingested food in T. castaneum larvae. Tagetes terniflora produced a feeding stimulant effect in T. castaneum adults. In addition, they had a feeding deterrent action against S. oryzae adults. The composition of essential oils from C. citratus and E. muticus varied only in one component.
These results showed that the essential oils from T. terniflora, C. citratus and E. muticus should be studied further for their use in integrated pest management programmes for T. castaneum and S. oryzae control.
评价了 Tagetes terniflora Kunth、Cymbopogon citratus Stapf. 和 Elyonurus muticus (Spreng) Kuntz 的精油成分和生物活性,以对抗储粮害虫。
T. terniflora 对两种害虫的成虫均表现出熏蒸和接触毒性。在接触毒性方面,这种油对赤拟谷盗(Herbst)的毒性较低。C. citratus 和 E. muticus 的精油对 S. oryzae 具有接触毒性。所有精油均产生:(a)对 T. castaneum 和 S. oryzae 幼虫和成虫以及 Sitophilus oryzae 成虫具有驱避作用;(b)对 T. castaneum 幼虫和 S. oryzae 成虫具有摄食后毒性,并改变 T. castaneum 和 S. oryzae 成虫的营养指数。Cymbopogon citratus 降低了 T. castaneum 幼虫的相对生长率和食物转化率效率。Tagetes terniflora 对 T. castaneum 成虫产生摄食刺激作用。此外,它们对 S. oryzae 成虫具有摄食抑制作用。C. citratus 和 E. muticus 的精油成分仅在一个成分上有所不同。
这些结果表明,T. terniflora、C. citratus 和 E. muticus 的精油应进一步研究,以用于赤拟谷盗和水稻象甲防治的综合害虫管理计划。