Tarbiat Modares University Journal of Crop Protection 2251-9041 7 3 2018 09 01 Effects of geraniol and citronellal compounds on biochemical and reproductive parameters of Spodoptera frugiperda (Lepidoptera: Noctuidae)  اثرات ترکیبات ژرانیول و سیترونلال روی پارامترهای بیوشیمیایی و تولید مثلی Spodoptera frugiperda (Lepidoptera: Noctuidae)  293 302 1394 10.48311/jcp.2018.1394 EN Carolina A. Guedes Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900, Recife-PE, Brazil. Valéria Wanderley-Teixeira Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Av. Dois Irmãos, 52171-900, Recife-PE, Brazil. Glaucilane Dos Santos Cruz Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900, Recife-PE, Brazil. Kamilla De Andrade Dutra Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900, Recife-PE, Brazil. Clóvis José Cavalcanti Lapa Neto Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Av. Dois Irmãos, 52171-900, Recife-PE, Brazil. Álvaro A. C. Teixeira Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Av. Dois Irmãos, 52171-900, Recife-PE, Brazil. José V. De Oliveira Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900, Recife-PE, Brazil. Journal Article The essential oils of plants are composed of several volatile compounds, which may have different concentrations and may be determinant for their toxicity. Thus, in this work, sublethal and lethal effects of the compounds, geraniol and citronellal on the biochemical and reproductive parameters of <em>Spodoptera frugiperda</em> were investigated. For the geraniol compound the LD₃₀ of 9.42 mg/g and LD₅₀ of 13.65 mg/g was used, while for the citronellal LD₃₀ of 0.06 mg/g and LD₅₀ of 0.08 mg/g. Pure acetone was used in the control. Third instar caterpillars were treated topically in the prothoracic region by applying 1 μl of the respective compounds with a Hamilton^TM 50 μl syringe. After 48 h the caterpillars were macerated in sodium phosphate buffer at a ratio of 4 caterpillars / 5 ml of the buffer, the levels of total protein, total sugar, lipid and glycogen were measured. The daily posture was evaluated in order to determine the periods of pre-oviposition, oviposition, post-oviposition and egg quantity. The results showed a reduction in the concentration of proteins and sugars for both compounds and concentrations studied. There was no change in lipid concentration. Citronellal increased the concentration of glycogen for both concentrations. The oviposition period and the number of eggs were reduced. However, there was no difference for the pre-oviposition and post-oviposition periods. Thus, it is inferred that geraniol and citronellal compounds cause alterations in the biochemical parameters that reflect in the reproduction of <em>S. frugiperda</em>. https://jcp.modares.ac.ir/article_1394_f016e59c7ad8b1d72903bb1aa5720d53.pdf