Comparative toxicity and biochemical studies of three organometallic pesticides and their metal salts against the gastropod slug Limax flavus (Müller). | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 6, Issue 1, June 1998, Pages 17-34 PDF (1.13 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1998.461426 | ||
| Author | ||
| Mohamed A. Radwan* | ||
| Department of Pesticide Chemistry, Faculty of Agriculture (El-Shatby), University of Alexandria, Alexandria, Egypt. | ||
| Abstract | ||
| Three organo-metal containing compounds (Copper 8-oxine, Berstan, and Ferbam) and their simple metal salts (Copper sulphate, Stannous chloride and Ferrous sulphate) were tested for their molluscicidal activity against Limax flavus slugs, by crawling slugs on treated Petri-dishes under laboratory conditions. The impact of these poisons (1/10 of its LC50) n slug weight, on three biochemical constituents (total proteins, total lipids and glycogen content) and on activities of three enzymes (GOT, GPT, and ATPase) of the slug tissue were also investigated three days after exposure for one hour. The results showed that the three simple metal salts were all toxic to slugs, while the three organo-metal containing compound were partially less toxic to slugs than that with metal salts. LC50 values of Berstan, Copper 8-oxine, Ferbam, Copper sulphate, Ferrous sulphate, and Stannous chloride were 13.1, 19.3, 86.2, 8.1, 9.7 and 16.27 µg metal cm-2, respectively. The loss of water from slug body was correlated with the molluscicidal potency. Significant reduction in total proteins, total lipids, and glycogen content, expressed as mg/animal was recorded, among slugs exposed to the three tested metal salts in addition to Berstan treatment when compared with the untreated slugs. The highest reduction was noticed in Copper sulphate treated slugs, while Berstan treatment exhibited the lowest one. All of the tested chemical treatments resulted in significant elevation of GOT and GPT activities. Both copper and tin derivatives significantly reduced the activity of ATPase. The pronounced reduction was higher among slugs exposed to copper compounds than that to tin compounds. | ||
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