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Toxic Effects of Three Different Formulations Bifenthrin Against the Workers of Reticulitermes Speratus Kollbe and Coptotermes Formosanus Shiraki

Author: ZouWenJuan
Tutor: ZhuLiYan；YinHong
School: Ocean University of China
Course: Ecology
Keywords: Bifenthrin Water emulsions SC EC The roost North Reticulitermes Coptotermes formosanus
CLC: S433
Type: Master's thesis
Year: 2009
Downloads: 143
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Abstract

The termite is a worldwide pest hazard area accounted for 50% of the total global area. Since the signing of the Stockholm Convention, had occupied the Termite Control Pharmacy dominance of chlordane and mirex gradually exit the stage of history. Looking for environmentally friendly drug a termite control staff is imperative. Although the physical control and biological environment friendly, but the technology is not mature enough and expensive, not widely used. At present, our country and the world as a whole range of termite control is still the main chemical control. In recent years, with the people to protect the environment and resource conservation awareness and concern on agricultural products, drug residues, chemical formulations are also gradually improved. Suspensions and water emulsions and water-based formulations termite control new pharmaceutical dosage form development direction. But whether there are differences in the control effect compared with traditional EC, there is no relevant reports. Bifenthrin is moderately toxic pesticides, does not have the risk of accumulation in the human body and mammals, safer environment. Feature is not mobile in the soil, have a unique role in aversion to both high cytotoxic good effect in the new housing termite prevention. Subject to different formulations of bifenthrin experimental medicines, contact poison effect experiment by Taiwan termites and habitat North termite, wood moth experiments and soil penetration experimental explore bifenthrin water emulsions, suspensions The difference of the new dosage forms and traditional EC of two termite control effect, provide a theoretical basis for the the Bifenthrin water emulsions and suspensions are widely used in termite control. The results are as follows: (1) termites continuous contact with bifenthrin the processing filter paper experiments show, bifenthrin SC and EC habitat North termite tag the existence of significant differences, the EC better. Water emulsion cream was no significant difference in continuous contact 48h termite death. The three formulations Pharmacy Taiwan termites toxicity was no significant difference in continuous contact 72 hours termite death. Tested ant mortality agent concentration, contact time is positively correlated. Bifenthrin termite the a better contact action, of the habitat north Reticulitermes than Coptotermes formosanus has a higher sensitivity of the contact. (2) bifenthrin soaked pieces of wood termite anti-decay experiments show that the three dosage forms drug concentrations below 125mg / L quite different habitat North termite anti-termite effect, the EC can better prevent termites on wood block The the Zhusi. When the concentration of 125mg / L and above of three insecticides can completely prevent termite-eaten. Violation of the pieces of wood to prevent termite water emulsions and suspensions concentration of 1000mg / L, the EC simply 250mg / L dose can have the same effect. (3) of bifenthrin soil on termites aversion experiments, spraying drugs after full penetration to a depth of about 3-4cm of Pharmacy with. The critical concentration in relation to habitat North termite as 15.625mg / L, the three formulations Pharmacy aversion effect termite no significant difference. Matters concerning the critical concentration of the termites in Taiwan can be given as 250mg / L, EC aversion effect is better than water emulsions and suspensions. Completely prevent termites penetrate the desired drug concentration higher than the lethal concentration obtained contact experiments. In summary, the Bifenthrin water emulsions and suspensions for wood protection and soil barrier effect is slightly lower than the EC formulations, but an appropriate increase in the concentration of the drug to achieve the desired control effect. View water emulsions and suspensions of environmental pollution and energy conservation and other factors, the study suggests that the the Bifenthrin water emulsions and suspensions more promotional value than conventional EC formulations.

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