Evaluation of Insecticidal Effects of Plants Essential Oils Extracted from Basil, Black Seeds and Lavender against Sitophilus oryzae

Abstract

The risk of using synthetic insecticides to the environment, human health, and the emergence of new genera of pests resistant to that kind of drugs, have led to attention in natural compounds. The present study aimed at evaluating the insecticidal activity of 0.25–6 mg/cm2 of basil (Ocimum basilicum), black seeds (Nigella sativa), and lavender (Lavandula angustifolia) essential oils (EOs) against one of the major stored product pests, Sitophilus oryzae (L.). This was done by assessing mortality and repellent percentage assay in the adult stage, as well as analysing up and down-regulated genes associated with toxicity effect of selected EOs. The three studied EOs showed a toxic effect on S. oryzae; where O. basilicum and L. angustifolia EOs explicated 100% mortality at 6mg/cm2 after 48 and 24 h, respectively. The highest repellence activity was recorded for O. basilicum EO at 0.75 mg/cm2 with value 82.3% after exposure time 5 h. In the highest dose (6 mg/cm2), the maximum up-regulated expression level of detoxification DEGs genes (CL1294 and CL 8) and cytochrome p45o gene (CYP4Q4) in Lavandula angustifolia EOs exhibited 8.32, 6.08, and 3.75 fold changes, respectively, as compared with 4.76 fold at 10 ppm malathion and 1.02 fold change in acetone control.

Toxics or Lures? Biological and Behavioral Effects of Plant Essential Oils on Tephritidae Fruit Flies

“…This compound may be responsible for the toxicity against C. capitata of EOs extracted from rosemary (Rosmarinus officinalis L., Lamiaceae) and lavender ( Lavandula latifolia Medik. ( =Lavandula angustifolia Moench) Lamiaceae) leaves [ 49 ] and its toxic activity has been already acknowledged against other pests of agricultural interest [ 137 , 138 , 139 , 140 ]. So far, studies on the toxicity by fumigation of EOs and their main compounds on true fruit fly immature stages have been rare and often inconclusive [ 141 , 142 ].…”

Development of New Restorer Lines Carrying Some Restoring Fertility Genes with Flowering, Yield and Grains Quality Characteristics in Rice (Oryza sativa L.)

“…Rice is a staple food and feed crop. Rice is one of the most important crops for almost all of the world especially developing countries [ 1 , 2 ]. Most of the traits of interest to breeders are complex and are the result of the interaction of several components [ 3 ].…”

Determination of the Elemental Composition of Aromatic Plants Cultivated Industrially in the Republic of Moldova Using Neutron Activation Analysis

“…A large body of research has been dedicated to studying the essential oils compositions of the species under discussion [8][9][10][11]. They have been popularly used in pharmaceuticals, medicine, cosmetic products, the tobacco industry, agriculture, and perfumery; for aromatherapy; food preparation, preservation, and flavoring; and as melliferous and ornamental plants [12][13][14][15][16][17][18][19][20]. In general, medicinal plants are important in pharmacological research and drug development, especially in cases where they are used as starting materials [21].…”