Controlled release of aldicarb from carboxymethyl cellulose microspheres: in vitro and field applications

Date

1999-12-01

Author

Kok, FN
Arica, MY
Gencer, O
Abak, Kazım
Hasırcı, Vasıf Nejat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

155
views

0
downloads

Aldicarb is a carbamate pesticide that is widely used throughout the world in the protection Of crops (eg cotton, nuts, potatoes, onion, tobacco, sugar beet and sugar cane). In Turkey, especially in the Cukurova region, it is used for the control of the cotton white fly (Bemisia tabaci) which attacks cotton plants cultivated in this region. Aldicarb contamination in surface and ground water is a serious problem in several countries, partly due to its high water solubility. It is also highly toxic to mammals. In order to overcome these problems, microspheres of aldicarb were prepared using carboxymethyl cellulose (CMC) as the biodegradable support material cross-linked with aluminium chloride. A strong hysteresis behaviour was observed upon drying and reswelling. Encapsulation efficiency was in the range 12-23% and aldicarb contents of 5.7-10.3 mg per 100mg of microspheres was achieved. In vitro release was distinctly Fickian, and Higuchi constants were very close to 0.5. Release in pots revealed that only one sample had a release capability for more than four weeks. In the cotton plot much longer durations of release (more than seven weeks) were observed while a commercial granular formulation released its content immediately. It was thus possible to construct a controlled pesticide release system that prolonged the bioavailability to about eight weeks. (C) 1999 Society of Chemical Industry.

Subject Keywords

Aldicarb, Carboxymethyl cellulose, Microsphere, Controlled release, Biodegradable

URI

https://hdl.handle.net/11511/31005

Journal

PESTICIDE SCIENCE

DOI

https://doi.org/10.1002/(sici)1096-9063(199912)55:12<1194::aid-ps79>3.0.co;2-h

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Gelatin microspheres and sponges for delivery of macromolecules Ulubayram, K; Eroglu, I; Hasırcı, Nesrin (2002-01-01) Gelatin microspheres and gelatin sponges were prepared by coacervation and freeze drying techniques, respectively. Both systems were crosslinked with glutaraldehyde. The mean diameter of the microspheres were in the range of 40-80 mum and the mean pore size of the sponges was 130-220 mum depending on the preparation conditions. Bovine serum albumin (BSA) was added into the preparation solutions and entrapped in the microspheres and sponges. BSA addition to sponges was also achieved by addition of BSA-contai...
Investigation of the role of glutathione S-transferase isozymes in pyrethroid resistance of Helicoverpa armigera in Turkey Konus, Metin; Ugurlu, Sakine; İşcan, Mesude (2009-09-13) Helicoverpa armigera, cotton bollworm, is one of the insects causing severe yield loss of economically important crops including cotton, legumes and vegetables. It has developed resistance against the pyrethroid insecticides that have been introduced into market. Resistance against pyrethroids have been reported in H. armigera populations at various parts of the world, however, except 1-chloro-2,4-dinitrobenzene substrate (CDNB), almost no any other substrates used for analysis of the role of glutathione S-...
Pesticide and model drug release from carboxymethylceullose microspheres Darvari, R; Hasırcı, Vasıf Nejat (1996-01-01) Water soluble derivatives of cellulose are widely used in various biomedical and biotechnological applications. Sodium carboxymethyl cellulose was insolubilized in the form of microspheres using aluminium chloride as the crosslinking agent. It was observed that, depending on the preparation medium pH, the spherical product could either be a microsphere with an ionotropic interior or a microcapsule. Various microspheres with different crosslinker, biopolymer, and drug (2',7'-dichlorofluorescein and aldicarb)...
Contrasting effects of biochar, compost and farm manure on alleviation of nickel toxicity in maize (Zea mays L.) in relation to plant growth, photosynthesis and metal uptake Rehman, Muhammad Zia-Ur; Rizwan, Muhammad; Ali, Shafaqat; Fatima, Nida; Yousaf, Balal; Naeem, Asif; Sabir, Muhammad; Ahmad, Hamaad Raza; Ok, Yong Sik (2016-11-01) Nickel (Ni) toxicity in agricultural crops is a widespread problem while little is known about the role of biochar (BC) and other organic amendments like farm manure (FM) from cattle farm and compost (Cmp) on its alleviation. A greenhouse experiment was conducted to evaluate the effects of BC, Cmp and FM on physiological and biochemical characteristics of maize (Zea mays L.) under Ni stress. Maize was grown in Ni spiked soil without and with two rates of the amendments (equivalent to 1% and 2% organic carbo...
Extraction of polylactic acid degradation products with supercritical carbon dioxide Koçak Bütüner, Sümeyye; Dilek Hacıhabiboğlu, Çerağ; Sezgi, Naime Aslı; Department of Chemical Engineering (2022-11-25) Polylactic acid (PLA) is a bio-based polyester derived from starch feedstocks such as sugar cane, sugar beet, or corn. PLA is used in industries like the medical sector, fibers and textiles, packaging, and agriculture. Since the PLA usage area is increasing, its recyclability has gained importance. Currently, chemical recycling for PLA has been conducted by pyrolysis, alcoholysis, or hydrolysis. In this research, an environmentally benign separation method was developed to recover the PLA depolymerization p...

Citation Formats

F. Kok, M. Arica, O. Gencer, K. Abak, and V. N. Hasırcı, “Controlled release of aldicarb from carboxymethyl cellulose microspheres: in vitro and field applications,” PESTICIDE SCIENCE, pp. 1194–1202, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31005.