Controlled release effect of insecticide microcapsules and their results in common household insect pest control

Gao, Y T; Shen, P Y; Wang, B H; Lu, Suxia; Huang, Guangwen; Ho, Lee Sang

doi:10.3109/02652048409031543

Cited by 16 publications

(2 citation statements)

References 2 publications

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“…Natural materials like poly( l ‐lactide), alginate, gelatin, and chitosan are biodegradable and used as a controlled‐release system for specific ingredients in food or for unstable drugs . Synthetic polymers such as urea or melamine, when directly applied to food, guaranteed thermal stability, high mechanical proprieties, and long‐term release .…”

Section: Introductionmentioning

confidence: 99%

Post‐harvest management control of Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae): new insights through essential oil encapsulation in cyclodextrin

Abada

Haouel-Hamdi

Gharib

et al. 2019

Pest Management Science

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BACKGROUND: Essential oils are reported to be bio-insecticides. However, problems related to their volatility, oxidation and poor water solubility need to be solved before they can be considered as replacement pest control methods. Thus, an appropriate formulation is needed for commercial use. In this work, a new control method based on the use of a powdered cyclodextrin (CD)/1,8-cineole inclusion complex was assessed against larvae and adults of Ectomyelois ceratoniae (Zeller) in comparison with two Rosmarinus officinalis (L.) essential oils, free 1,8-cineole (oils major compound) and a mixture of 50% CD/1,8-cineole inclusion complex and 50% free 1,8-cineole. −1 air, the respective mortalities were 94.12%, 35.29% and 19.61% for solid CD/1,8-cineole complex, Thala and Cap Zbib oils after 37 days of exposure. Moreover, the solid CD/1,8-cineole complex achieved 5% adult emergence versus 68.33% for Cap Zbib and 55% for Thala oils. The half-life of solid CD/1,8-cineole inclusion complex (10.98 days) was considerably longer than that of the mixture (7.53 days) or free 1,8-cineole (3.43 days). CONCLUSION: This work highlights the utility of essential oil encapsulation in CD to overcome restrictions when used to control the date moth E. ceratoniae during storage. RESULTS: Solid CD/1,8-cineole complex was more toxic against E. ceratoniae larvae than the two crude essential oils. At a concentration of 15 L liter

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Section: Introductionmentioning

confidence: 99%

Post‐harvest management control of Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae): new insights through essential oil encapsulation in cyclodextrin

Abada

Haouel-Hamdi

Gharib

et al. 2019

Pest Management Science

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“…However, on a few practical application fields of these composite particles, it is strongly desired that the composite particles are prepared by using biodegradable materials [3]- [6]. For an example, it has been tried to prepare microcapsules or composite particles, which contain agricultural medicine or pheromone for noxious insects, by biodegradable materials based on natural elemental materials, because it may be expected that the biodegradable shell materials should vanish after complete release of core material and environmental pollution could be prevented [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Composite Particles Made of Biodegradable Polymer and a Few Additives with Phase Separation Followed by Drying-in-Liquid

Kutsuwada¹,

Taguchi²

2015

JEAS

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It was tried to prepare the biodegradable composite particles by the phase separation method followed by the drying-in-liquid method. The composite particles were made of poly-ε-caprolactone, quaternary ammonium, carbon black and wax. In the experiment, acetone and water were selected as a good solvent and a poor solvent for poly-ε-caprolactone, quaternary ammonium and wax, respectively. The composite particles were prepared by changing the surfactant species and their concentration, the feeding velocity of water and the weight ratio of poly-ε-caprolactone with larger molecular weight to one with smaller molecular weight. The composite particles with the inner structure in which carbon black, quaternary ammonium and wax were coated well with poly-ε-caprolactone could be prepared by the preparation method presented in this study. The structure and the mean diameter of composite particles were strongly affected by the feeding velocity of water. The higher the feeding velocity of water, the larger the mean diameter of composite particles. The mean diameter was drastically decreased with the surfactant concentration and increased with the added amount of poly-ε-caprolactant with larger molecular weight.

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Shell thickness and chemical structure of polyurea microcapsules prepared with haxamethylene diisocyanate uretidione and isocyanurate

Takahashi

Taguchi

2007

J of Applied Polymer Sci

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To investigate the dependence of the shell thickness on both the microcapsule size and the concentration of hexamethylene diisocyanate (HMDI) and to analyze the chemical structure of the polyurea shell, polyurea microcapsules were prepared by using the reaction between HMDI uretidione/isocyanurate and ethylene diamine (EDA) in an oil-in-water emulsion. In the experiment, the concentrations of hexamethylane diisocyanate and EDA were changed. The shell thickness was correlated well with the mean size and the concentration of HMDI on the surface area per unit volume of microcapsule. From the solid-state 13 C NMR spectroscopy analysis, the uretidione and isocyanurate ring structures were found to be not changed before and after the reaction. From the wide-angle X-ray diffraction analysis, it was suggested that the chemical structure of the polyurea shell was amorphous. From the FTIR spectra analysis, it could be concluded that polyurea microcapsules were prepared by the reaction between HMDI uretidione/isocyanate and EDA.

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Controlled release effect of insecticide microcapsules and their results in common household insect pest control

Cited by 16 publications

References 2 publications

Post‐harvest management control of Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae): new insights through essential oil encapsulation in cyclodextrin

Post‐harvest management control of Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae): new insights through essential oil encapsulation in cyclodextrin

Preparation of Composite Particles Made of Biodegradable Polymer and a Few Additives with Phase Separation Followed by Drying-in-Liquid

Shell thickness and chemical structure of polyurea microcapsules prepared with haxamethylene diisocyanate uretidione and isocyanurate

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