Alteration of certain acaricides toxicity owing to mixing with fertilizers
El-Shazly, M. (2014). Alteration of certain acaricides toxicity owing to mixing with fertilizers. EKB Journal Management System, 8(2), 65-71. doi: 10.21608/ajesa.2014.163852
M. M. El-Shazly. "Alteration of certain acaricides toxicity owing to mixing with fertilizers". EKB Journal Management System, 8, 2, 2014, 65-71. doi: 10.21608/ajesa.2014.163852
El-Shazly, M. (2014). 'Alteration of certain acaricides toxicity owing to mixing with fertilizers', EKB Journal Management System, 8(2), pp. 65-71. doi: 10.21608/ajesa.2014.163852
El-Shazly, M. Alteration of certain acaricides toxicity owing to mixing with fertilizers. EKB Journal Management System, 2014; 8(2): 65-71. doi: 10.21608/ajesa.2014.163852

Alteration of certain acaricides toxicity owing to mixing with fertilizers

Acarines: Journal of the Egyptian Society of Acarology
Article 11, Volume 8, Issue 2, December 2014, Page 65-71  XML PDF (7.22 MB)
Document Type: Original research articles
DOI: 10.21608/ajesa.2014.163852
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Author
M. M. El-Shazly
Plant Protection Dept., Fac. of Agric. (Saba Basha), Alexandria Univ., Egypt
Abstract
The lethal effect of five acaricides alone or mixed individually with ten separate fertilizers, on the phytophagus mite Tetranychus urticae, was evaluated after 72 hours under laboratory conditions of 30 °C 5 and R. H. 70 % ± 5. The tested acaricides were fenpyroximate (Ortus 5% EC), ethion (Endo 50% EC), abamectin (Vertimec 1.8% EC), chlorfenapyr (Challengers 36% SC) and hexythiazox (Maccomite 10% WP). Used fertilizers were potassium sulphate, ferrous sulphate hepta hydrate, magnesium sulphate hepta hydrate, zinc sulphate hepta hydrate, ammonium sulphate, ammonium nitrate, calcium nitrate, di ammonium phosphate, phosphoric acid and urea. LC95 values of the previous acaricides singly were 422.8, 2112.9, 6, 0.9 and 363.6 p.p.m., respectively. LC50 values of the previous acaricides singly were: 329.8, 1851, 5.5, 0.4 and 259.6 p.p.m., respectively. The recommended doses of the previous acaricides were 1.5, 0.8, 72.8, 1007.6 and 0.8 fold of LC50 values of these acaricides, respectively. Potassium sulphate had a synergistic effect on each of Ortus and Vertimec, but had an antagonistic effect on Endod, Challenger and Maccomite. Each of ferrous sulphate hepta hydrate, magnesium sulphate hepta hydrate, zinc sulphate hepta hydrate, ammonium sulphate, ammonium nitrate, calcium nitrate and di ammonium phosphate had an antagonistic effect on all the examined acaricides. Phosphoric acid had a synergistic effect on Ortus only but had an antagonistic effect on the rest tested acaricides, Urea had a synergistic effect on Ortus and Challengers but had an antagonistic effect on the rest acaricides.
Keywords
Tetranychus urticae; acaricides; fertilizers; mixing; toxicity
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