Garuda - Garba Rujukan Digital

Silvi Ikawati, Silvi

Unknown Affiliation

Author-ID : 503076

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Medicine & Pharmacology

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1

Bioactivity of Citrus hystrix D.C. Leaf Extract Against Cigarette Beetle Lasioderma serricorne (F.) Ikawati, Silvi; Dhuha, Moh. Syamsu; Himawan, Toto
Journal of Tropical Life Science Vol 7, No 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.01

The major control of pest stored Lasioderma serricorne for using synthetic pesticides, look like phosphine. Although quite effective, synthetic pesticides have a negative effect on the environment, such as pest re-sistance, deadly natural enemies, residues that are harmful to the environment and human health. The use of botanical pesticides as an alternative control be the focus this study. Botanical pesticides are selective to the target, safe for non-target insects and the environment. This research studies the repellent and fumigant activi-ty of the leaf extract of Citrus hystrix against all L. serricorne life stage. The results of GC-MS analysis of leaf crude extracts of C. hystrix with N-hexane solvent showed the highest percentage in the citronellal compound (86.43%). C. hystrix leaf extract showed stronger fumigant against pupae and eggs, compared adults, and larvae. The toxicity of the leaf extract of C. hystrix increased with increasing concentration. At a concentration of 60 ppm, fumigant activity showed the toxicity of 98.75% (pupae), 93.75% (eggs), 86.25% (adults) and 76.25% (larvae). Sequentially the LC50 value of fumigant activity from the highest to the lowest as follows; larvae 47.56 ppm, adults 43.42 ppm, eggs 31.61 and pupae 29.63 ppm. Extract of leaves of C. hystrix, have character repellent against L. serricorne. At a concentration of 60 ppm the IR value of 66% including repellent class IV, which means strong repellent level. Based on the results of the research, extracts of leaves of C. hystrix has a fumigant activity and repellent for controlling L. serricorne.

Toxicity of Clove Oil Nanoparticle Againts (Aphis gossypii) on Chili (Capsicum annum) and Its Predator (Cheilomenes sexmaculata): Toxicity of CO-NPs againts A. gossypii and C. sexmaculata Ikawati, Silvi; Boangmanalu, Maslina; Choliq, Fery Abdul; Aji Pamungkas, Bayu
Journal of Tropical Life Science Vol. 14 No. 3 (2024): In Press
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.14.03.04

One of the pests that cause economic losses in Chili (Capsicum annum L.) is aphid (Aphis gossypii Glover) (Hemiptera: Aphididae). Therefore, it is necessary to carry out alternative controls that are not damaging and detrimental to the surrounding environment including against beneficial organisms such as the natural enemy Cheilomenes sexmaculata Fabricius (Coleoptera: Coccinellidae). Clove oil and the formulation of essential oils in the form of nanoparticles have been used as a botanical pesticide. The purpose of this work is to determine the toxicity of a clove oil nanoformulation against aphids (A. gossypii) and the six-spotted zigzag ladybird predator C. sexmaculata. This work has six treatments and four replications using a fully randomized design. The results showed that clove oil nanoparticles (CO-NPs) significantly affected mortality and decreased the number of offspring of A. gossypii. The average size of the tested nanoparticles was 166.38 nm and the average zeta potential value of the tested nanoparticles was -19 mV. The CO-NPs can affect the increase in mortality and decrease in the offspring number of A. gossypii. The LC50 value of A. gossypii was 0.32% at the time of observation 48 hours after application while the LT50 value was 3 hours at a concentration of 1.2%. The percentage of decrease in the number of offspring reached 95.01% at a concentration of 1.2%. Results of calculating the selectivity ratio value (SR) showed that CO-NPs are selective against predators C. sexmaculata, with the SR value <1.

Toxicity of Clove Oil Nanoparticle Againts (Aphis gossypii) on Chili (Capsicum annum) and Its Predator (Cheilomenes sexmaculata): Toxicity of CO-NPs againts A. gossypii and C. sexmaculata Ikawati, Silvi; Boangmanalu, Maslina; Choliq, Fery Abdul; Aji Pamungkas, Bayu
Journal of Tropical Life Science Vol. 14 No. 3 (2024)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.14.03.04

One of the pests that cause economic losses in Chili (Capsicum annum L.) is aphid (Aphis gossypii Glover) (Hemiptera: Aphididae). Therefore, it is necessary to carry out alternative controls that are not damaging and detrimental to the surrounding environment including against beneficial organisms such as the natural enemy Cheilomenes sexmaculata Fabricius (Coleoptera: Coccinellidae). Clove oil and the formulation of essential oils in the form of nanoparticles have been used as a botanical pesticide. The purpose of this work is to determine the toxicity of a clove oil nanoformulation against aphids (A. gossypii) and the six-spotted zigzag ladybird predator C. sexmaculata. This work has six treatments and four replications using a fully randomized design. The results showed that clove oil nanoparticles (CO-NPs) significantly affected mortality and decreased the number of offspring of A. gossypii. The average size of the tested nanoparticles was 166.38 nm and the average zeta potential value of the tested nanoparticles was -19 mV. The CO-NPs can affect the increase in mortality and decrease in the offspring number of A. gossypii. The LC50 value of A. gossypii was 0.32% at the time of observation 48 hours after application while the LT50 value was 3 hours at a concentration of 1.2%. The percentage of decrease in the number of offspring reached 95.01% at a concentration of 1.2%. Results of calculating the selectivity ratio value (SR) showed that CO-NPs are selective against predators C. sexmaculata, with the SR value <1.

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