Effects of uv-light, temperature and storage on the stability and biological effectiveness of some insecticides

• Autorzy: Soliman M.M.M.
• Języki publikacji: EN

Abstrakty

EN

The degradation and biological effectiveness of five insecticides, ES-Fenvalerate (Soumi Gold), pirimicarb (Afox), imidacloprid (Emax), buprofenzin (Ablloud) and methomyl (Methiolate) in their aqueous preparations and emulsifiable concentrates, on immature stages of whitefly insect Bemisia tabaci. when exposed to UV-light, two different temperatures and daylight and dark storage after exposure intervals was studied. The results indicated the degradation rates of the five tested insecticides varied according to the chemical structure, time of exposure and wavelength of UV-rays used. Of all the five insecticides, methomyl was the most affected by UV-rays. Losses of ES-Fenvalerate, pirimicarb, imidacloprid, buprofenzin and methomyl within this period were 11.30, 14.80, 29.03, 31.83 and 39%, respectively after one hour to UV-ray exposure. A significant increase in LC50 value was obtained when ES-Fenvalerate in aqueous preparation was exposed to UV-light for 6 hr. The LC50 values and their confidence ranges in aqueous preparations and emulsifiable concentrates were 107.5 ppm (51.7-199.2) and 93.10 ppm (48.3-150.4). The residual level of Fenvalerate, pirimicarb, imidacloprid, buprofenzin and methomyl were 13.52, 17.54 ppm; 12.67, 15.87 ppm; 11.78, 16.47 ppm; 11.38, 14.73 ppm; and 11.36, 11.83 ppm for two days exposed to daylight and dark storage. Insecticides could be arranged according to LC50 values at zero-time as follow: ES-Fenvalerate, pirimicarb, imidacloprid, buprofenzin and methomyl. The corresponding values of LC50 were 3.40, 15.4, 15.6, 16.2 and 23.5 ppm for daylight storage. On the other hand, the dark storage exposure for the tested insecticides could be arranged according to LC50 values as follow: ES-Fenvalerate, imidacloprid, pirimicarb, buprofenzin and methomyl. The corresponding LC50 were 3.20, 14.8, 14.9, 15.9 and 21.3 ppm, respectively. In general, the amount recovered after a one day, 45°C exposure were 14.63, 12.84, 12.79, 12.14 and 11.76 ppm, for ES-Fenvalerate, pirimicarb, imidacloprid, buprofenzin and methomyl, respectively. While the amounts recovered after a three day 45°C exposure were 9.28, 8.34, 7.76, 7.72 and 5.83 ppm for ES-Fenvalerate, pirimicarb, imidacloprid, buprofenzin and methomyl, respectively. Efficiency against whitefly insect, B. tabaci immature stages was affected when aqueous preparations of the five tested insecticides were stored at 45°C for one and three days, compared to those stored under normal condition of 25°C for the same periods of time. Generally it could be concluded that buprofenzin n and methomyl, were more affected by UV-light, storage and temperature than ES-Fenvalerate, pirimicarb, imidacloprid.

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2012
• Tom: 52
• Numer: 2
• Opis fizyczny: p.275-280,ref.

Twórcy

autor

Soliman M.M.M.

• Plant Protection Department, Faculty of Agriculture, South Valley University Qena P.O. Box 83523, Egypt

Bibliografia

• Abbott W. S. 1925. A method of computing the effectiveness of an insecticide. J. Econ. Entomol. 18: 265-267.
• Abdel-Razik M., Hegazi M. E. A., EL-Sayed M. M. 1982. Persistence of some organophosphorous pesticides under different degrees of temperature, ultra-violet rays (2357 Aˆ) and direct sunlight. Proc. Egypt Nat. Conf. 849-860.
• Abu-Zahw M. M., Hegazy M. E. A., Dogheim S. M., Almaz M. M., Shahin A. 1988. Thermal and photodecomposition of fentrothion and esfenvalerate insecticides. Bull. Ent. Soc. Egypt. Econ. Ser. 17: 183-198.
• Barakat A. A., Samira A. A., Badawy H. M. A., Sammour E. A., Soliman M. M. M. 1994. Persistence of profenofos and pirimiphos-methyl in green cowpea pods and on films exposed to ultra-violet and sun rays. Bull. Ent. Soc. Egypt, Econ. Ser. 21: 103-112.
• Christou P., Capell T. 2009. Transgenic crops and their applications for sustainable agriculture and food security. p. 3-22. In: "Environmental impact of Genetically Modified Crops" (N. Ferry, A. M. R. Gatehouse, ed.). CABI Publishing, Wallingford.
• Dipakshi S., Avinash N., Yogesh B., Jatinder K. K. 2010. Analytical methods of organophosphorus pesticide residues in fruits and vegetables: A review. Talanta 82: 1077-1089.
• El-Sayed E. I., Abdallah S. A. 1979. Biological stability of some synthetic pyrethroids as affected by light, temperature and storage. Proc. 3rd Pesticide Conf. Tant. Univ. 9 (1): 296-304.
• El-Sayed M. M., Shaaban A. M., Zidan Z. A., Abu-zahw M. M. 1980. Persistence and biological transformation of Curacron, Cyolane, and Reldan insecticides as affected by temperature, UV-rays and sunlight. p. 361-380. In: Proc. 1st Conf. Plant Prot. Res. Ins. Dokki, Cairo, Egypt, 13-15 December 1980.
• El-Tantawy M. A., Hussien N. M. 1978. Effects of temperature and sunlight on the stability and biological effectiveness of some organophosphorous insecticides in their liquid and granular formulation. p. 533-540. In: 4th Conf. Pest Control. National Research Centre, Cairo, Egypt, 30 September 1978.
• Finney D. J. 1971. Probit Analysis. 2nd ed. Cambridge Univ. Press London, 318 pp.
• Gupta R. K., Gupta S., Gajbhiye V. T., Meher H. C., Singh G. 2005. Residues of imidcloprid, acetamiprid and thiamethoxam in gram. Pestic. Res. J. 17 (1): 46-50.
• Katagi T. 2004. Photodegradation of pesticides on plant and soil surface. Rev. Environ. Contam. Rev. Environ. Contam. Toxicol. 182: 1-195.
• Linders J., Mensink H., Stephenson G., Wauchope D., Racke K. 2000. Foliar interception and retention values after pesticide application. a proposal for standardized values for environmental risk assessment. Pure Appl. Chem. 72 (11): 2199-2218.
• Manuel M.-S., Mercedes M., Javier A. F., Vidal J. L. M. 2003. Analysis of Acetamiprid in vegetables using Gas Chromatography-Tandem Mass Spectrometry. Anal. Sci. 19 (5): 701-704.
• Park S. B., Lee E. S., Choi S. W., Jeong Y. C., Song C., Cho Y. K. 2002. Insecticidal and acaricidal activity of pipernonaline and piperoctadeca lidine derived from dried fruits of Piper longum L. Crop Prot. 21: 241-249.
• Pena A., Rodriguez-Liebana J. A., Mingorance M. D. 2011. Persistence of two neonicotinoid insecticides in wastewater and in aqueous solutions of surfactants and dissolved organic matter. Chemosphere 84 (4): 464-470.
• Raha P., Banerjee H., Asit K. Das, Adityachaudhury N. 1993. Persistence Kinetics of endosulfan, fenvalerate and decamethrin in and on eggplant (Solanum melongena L.). J. Agric. Food Chem. 41 (6): 923-928.
• Sanyal D., Chakma D., Alam S. 2008. Persistence of a Neonicotinoid Insecticide, Acetamiprid on Chili (Capsicum annum L.). Bull. Environ. Contam. Toxicol. 81: 365-368.
• Shokr S. A. A. 1997. Environmental pollution by pesticide residues. Ph. D. Thesis, Fac. Agric. Kafr El-Sheikh Tanta Univ., 142 pp.
• Zepp R. G., Chine D. M. 1973. Rate of direct photolysis in aquatic environment. Environ. Sci. Technol. 11: 359-366.

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