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Journal of Applied Chemistry and Environment Protection
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Open Access journal
ISSN (Online) 2509-1468
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Chemical composition and potential acaricide of Salvia officinalis and
Eucalyptus globulus on Tetranychus urticae Koch (Acarina: Tetranychidae)
- Authors: Asmae BAKKALI AISSAOUI
  Abstract: Essential oil chemical composition of Salvia officinalis and Eucalyptus globulus was assessed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). In order to develop sustainable pest control, the present work aimed to evaluate the toxicity as contact acaricide of these plants against the two spotted spider mite, T. urticae, adults, larvae and eggs using a leaf disc bioassay method. The repellent effect and the persistence were also assessed. Leaf discs treated with increasing concentrations of the two oils showed increased mortality of spider mite larvae and adults. S. officinalis oil proves more toxic against T. urticae than E. globulus oil. A mortality of 100% of adults and larvae was recorded by Salvia officinalis oil at doses of 2% and 1%, respectively. For these same doses, mortality was 63.29% of adults and 63.33% of larvae for E. globulus oil. However, both essential oils Causes a high reduction in the total numbers of eggs. Both materials used were potent against T. urticae with a significant increase in repellency. The most potent repellency effect was recorded for E. globulus. At 8%, repellent effect was 100% for E. globulus and 60% for S. officinalis. In other hand, Essential oils tested are non-persistent in the environment.These results indicate that the essential oils of S. officinalis and E. globulus have the potential to be developed as botanical acaricides for eco- friendly management of T. urticae.
  PubDate: 2019-12-06
  Issue No: Vol. 4, No. 1 (2019)
Chemical composition and potential acaricide of Salvia officinalis and
Eucalyptus globulus on Tetranychus urticae Koch (Acarina: Tetranychidae)
- Authors: Asmae BAKKALI AISSAOUI, Said ZANTAR, Amal ELAMRANI
  Abstract: Essential oil chemical composition of Salvia officinalis and Eucalyptus globulus was assessed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). In order to develop sustainable pest control, the present work aimed to evaluate the toxicity as contact acaricide of these plants against the two spotted spider mite, T. urticae, adults, larvae and eggs using a leaf disc bioassay method. The repellent effect and the persistence were also assessed. Leaf discs treated with increasing concentrations of the two oils showed increased mortality of spider mite larvae and adults. S. officinalis oil proves more toxic against T. urticae than E. globulus oil. A mortality of 100% of adults and larvae was recorded by Salvia officinalis oil at doses of 2% and 1%, respectively. For these same doses, mortality was 63.29% of adults and 63.33% of larvae for E. globulus oil. However, both essential oils Causes a high reduction in the total numbers of eggs. Both materials used were potent against T. urticae with a significant increase in repellency. The most potent repellency effect was recorded for E. globulus. At 8%, repellent effect was 100% for E. globulus and 60% for S. officinalis. In other hand, Essential oils tested are non-persistent in the environment.These results indicate that the essential oils of S. officinalis and E. globulus have the potential to be developed as botanical acaricides for eco- friendly management of T. urticae.
  PubDate: 2019-12-06
  Issue No: Vol. 4, No. 1 (2019)
Determination of Pesticide Residue in Water and Khat (Catha edulis) Leaves
Using GC-ECD
- Authors: Dagne Bayih Adamu, Tesfaye Muluye, Teshome Gonfa, Temesgen Achamo, Tamado Tana
  Abstract: In this work the concentration of some selected pesticides such as aldrin, dialdrin, BHC, diazinon, DDT, 4,4-DDE and heptachlor were investigated in water and khat samples that were collected from five different sites. The pesticides were extracted using liquid-liquid and solid phase extraction technique and analyzed by GC-ECD. The recovery test, linearity cure and extraction efficiency were tested by using standard pesticide samples. The highest concentration of pesticide obtained in water samples is diazinon in WS2 (0.0698mg/L), and the lowest concentration is heptachlor in WS3 (0.0006mg/L). The highest and lowest concentrations of pesticides obtained in Khat samples are diazinon in KS1 (0.0323mg/L) and KS3 (0.0001mg/L) respectively. The concentration of diazinon and four isomers of BHC detected in each water sample are higher than the recommended limits set by WHO which shows contamination of the lake water. Diazinon and DDT levels in KS1 (0.0323mg/L), KS2 (0.0293mg/L) and KS1 (0.0134mg/L), KS2 (0.0173mg/L) respectively are above the maximum residue level.
  PubDate: 2019-12-06
  Issue No: Vol. 4, No. 1 (2019)

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