The Study Of New Formulation To Control The Cockroaches

The formulations of microencapsules emulsion(ME), microencapsules bait and microencapsules suspension(MS) of three kinds of pesticides Fipronil , Cyhalothrin and Emanmectin benzoate as well as their mixture,selected from eight kinds of insecctsides based on their toxicity to blattella germenica,were studied in this research .To prepare the MEs of 0.5% Emanmectin benzoate, 0.5% Cyhalothrin ME and 0.5% the mixture of Cyhalothrin and Emanmectin benzoate(1:1)ME , the suitable solvent, emulsion and counterfreeze were chose from 7 solvents, 14 emulsions as well as 7 mulsions .which showed that the ME of 0.5% Emanmectin benzoate was prepared by the emulsion 0203B, the solvent N-methyl pyrrolidone and the counterfreeze PEG200, the ME of 0.5% Cyhalothrin was prepared by the mulsion OAE400 and counterfreeze PEG200, the ME of 0.5% the mixture of Cyhalothrin and Emanmectin benzoate(1:1) was prepared by the mulsion 0203B, OAE400, the solvent N-methyl pyrrolidone and counterfreeze PEG200.The Microcapsules of Fipronil and Cyhalothrin were prepared by two methods of the in situ condensationpolymerization reaction in aqueous medium and the spray-dryer. Which showed that the solid, spherical microencapsules with good flowability can formed by the two methods. Microencapsules bait formed by the microencapsules show very good efficeicy to Blattella germenica.the MS with good physical and chemical property was prepared by choosing suitable emulsion , counterfreeze, dispersant, thickener. Which showed that the MS with good toxicity to Blattella germenica. and good physical and chemical property was formed by the emulsion OAE400, lauric acid polyethylene glycol 400 ester and TX-10, the dispersant calcium lignin sulphomate andBX, thichener OX-638, the counterfreeze PEG200 or diglcol ether.