Fumigant and Repellent Effects of Essential Oil Fractions of Mentha piperita against Tribolium castaneum (Coleoptera: Tenebrionidae)

Indonesia has a lot of aromatic plants that can be distilled to obtain the essential oil. These essential oils can be used for primary component of botanical pesticides due to some components avoided by insect. The study aimed to define the component of Eucalyptus grandis and its potential to control the rice weevil Sitophilus oryzae. The formula of essential oil E. grandis with different concentrations including: 0,25%; 0,5%; 1%; 1,5%; 2%; and control were used to see the mortality of S. oryzae. The result shows that according to the Gas Chromatographic-Mass spectral (GCMS), the E. grandis contains Eucalyptol 46,86%, with the great mortality value of S. oryzae after 96 hours application was 75% at 2% concentration. Thus, the concentration of 1,88 μl/ml of E. grandis was effective to kill 50% of S. Oryzae on day 1. Meanwhile, the concentration of 17,29 μl/ml was effective to kill 95% S. oryzae on day 1. E. grandis contains the most Eucalyptol which tends to be repellent for insects. This suggests that E. grandis could be used as an insecticide alternative to control S. oryzae.

Section: Toxicology Testmentioning

confidence: 99%

Chemical Compounds and Effectivity of Eucalyptus grandis Oil Against Sitophilus oryzae (Coleoptera: Curculionidae)

Maulidya,

Rismayani,

Suharto

et al. 2023

“…A toxicity test was conducted by preliminary test to determine the concentration range that can cause toxicity which is capable of killing around 5-99% of S. zeamais insects [22]. This test was conducted by using the fumigation method with filter paper [23]. E. citriodora oil and A. vulgaris oil were tested on five concentrations, which were 1.5%, 2%, 2.5%, 3%, 3.5%, or equal to 0.15, 0.20, 0.25, 0.30, 0.35 ml/L and control.…”

Section: Toxicity Testmentioning

confidence: 99%

The potential of essential oils Eucalyptus citriodora and Artemisia vulgaris against Sitophilus zeamais (Coleoptera: Curculionidae)

Rismayani¹,

Rohimatun²,

Mardiningsih³

et al. 2022

Medicinal plants have been developing as the main material for botanical pesticides. Many medicinal plants can be used as botanical pesticides due to their effectiveness in controlling the pest. This study aims to examine the potential of Eucalyptus citriodora and Artemisia vulgaris against Sitophilus zeamais, which can be used to control the storage pest using these plants without using synthetic pesticide. This study was conducted in the pest laboratory, Indonesian Spice and Medicinal Crops Research Institute (ISMCRI), from January to February 2021. The formula of two essential oils of E. citriodora and A. vulgaris with different concentrations (1.5%, 2%, 2.5%, and 3%) were used to control S. zeamais. The result showed that the A. vulgaris had the most potent efficiency as a botanical pesticide against S. zeamais. The highest mortality values of imago S. zeamais at 72 hours after applying E. citriodora and A. vulgaris were 90% and 93%, respectively. Artemisia vulgaris has the highest reaching repellent percentage of imago S. zeamais its 85% at 1 hour after application for 3% concentration. Indicates that essential oils, E. citriodora, and A. vulgaris, possess insecticidal activity against S. zeamais.

“…methanol (polar) and n-hexane (non-polar). The hexane fraction was found to be more effective for further use in insect control [14]. Mint oil (50 ml) was added into n-hexane (75 ml) in a separating funnel.…”

Section: Preparation Of N-hexane Fraction Of Mint Oilmentioning

confidence: 99%

Polymeric Encapsulation of Mint Oil: Effect of Oil Load on the Physical Properties

Yuliani

Wahyuningsih

Widayanti

et al. 2022

Mint oil has many applications including foods, perfumes and fragrances, pharmaceuticals, cosmetics and pest control. This essential oil is easily damaged because of its high sensitivity to environmental conditions such as heat, oxygen, light and reactions with other compounds. Encapsulation provides protection of the oil against these undesirable conditions. This study was aimed at evaluating the characteristics of mint oil encapsulated in polyethylene glycol (PEG 6000) as influenced by mint oil load. Mint oil was encapsulated in polyethylene glycol at four different percentages (5.0, 7.5, 10 and 12.5%) using a melt dispersion technique. The experiment was done in two replicates. The encapsulates were characterized for their morphology, size attributes and thermal properties. Particulate sizes ranged from 281.4 – 569.5 nm and tended to increase with the increase in oil load. Microstructure of the particles examined under scanning electron microscope showed irregular flakes with sizes around 10 μm. These particles contained oil droplets in the sizes of about 200 – 500 nm as confirmed by observation with a transmission electron microscope. The enthalpy of melting of encapsulates were higher than that of mint oil, describing the enhancement of oil stability under thermal conditions. This study provides useful information in developing essential oil encapsulation for use in wider applications.