Choice Of Synthetic Polymer Films Of Seed-coating Formulation

Six types of copolymers which is acrylamide-butyl acrylate-phenylethylene, cisethylethylen diacid-butyl acrylate-phenylethylene, ethyleneylacetate-butylacrylate-phenylethylene, oleic acid-butyl acrylate-phenylethylene, suboleic acid-butyl acrylate-phenylethylene, and acrylic acid-butyl acrylate-phenylethylene, including eleven kinds of polymer films were synthesizeds on different experiment conditions with eight organic compounds of acrylamide.cisethylethylen, ethyleneyl acetate,oleic acid,suboleic acid, acrylic acid,butyl acrylate and phenylethylene.. Results of the test for the physical properties of eleven kinds of synthetic polymer films showed that seven synthetic polymer films of acrylamide-butyl acrylate-phenylethylene and acrylic acid-butyl acrylate-phenylethylene have better physical properties than sodium carboxymethyl cellulose (CMC). Five polymer films of SA-2, SA-3,SA-4,SA-10,SA-11 have no effect on seed or stimulate seed activity among the seven polymer films with good physical properties in the experiment of seed germination. The above five polymer films were formulated seed coating formulations.The results showed that the four kinds of seed coating formulations of SCF1, SCF2, SCF4, SCF5 were up to product standard. The film forming time of SCF4, SCF5 were short and the deciduous rates were lower than contrast seed coating formulation. Seeds of cotton coated by SCF1, SCF2, SCF4, SCF5 were used in field trial to choice further.The emergence and seedling quality of coated cotton seeds and the different kinds of seed coating formulations control of aphis were tested in the field trial in 2001.The results of seedling emergence showed that the emergence days of SCF4, SCF5, seed dressing with imidacloprid, Gaucho and uncoated seeds are the same, and seeds coated by SCF-CMC, SCF1, SCF2 are late for one day. The emergence rate of SCF5 is higher than Gaucho and that of SCF4, seed dressing with imidacloprid, SCF2, SCF-CMC,SCF1, are lower than Gaucho in sequence. The results of seedling quality showed that different treatments are different as to the five standards of seedling quality. According to the comprehensive access, SCFS and Gaucho are excellent among various treatments. Because of the effect of environment factors, all treatments except uncoated seeds of cotton did not reach the control standard and the controlled-release periods of different treatments could not be identified. But the leaf roll rate of SCFS and Gaucho were lower than other seed coating formulations apparently.The results of indoor choice and field trial of SCF1, SCF2, SCF4 and SCFS formulated by SA-2, SA-4, SA-10, SA-11 showed that SCFS is better than Gaucho in film forming time, coating degree of consistency, deciduous rate and control aphis effect, but the stability of thermal storage is not better than Gaucho and the further study on this field is needed lately.