Study on Biological Activity of New Compound SYP-260

SYP-260 is one of the novel pyrimidine structure chemicals. The biological activity of new compound SYP-260 was tested in this paper using different bioassay methods in the laboratory. Experimental results indicated that the values of median lethal concentration(LC₅₀, 72 h) of new compound SYP-260 against broad bean aphid, green peach aphid and cotton aphid were 0.1708, 0.2455 and 0.2632 mg · L^-1, respectively. The LC₅₀ of new compound SYP-260 was 0.8892 mg · L^-1 against adult mite and the ovicidal activity of new compound SYP-260 was 0.7166 mg · L^-1. The LC₅₀ of new compound SYP-260 was 22.1991, 71.6915, 79.6149 and 42.5698 mg · L^-1 against oriental armyworm, diamondback moth, corn borer and beet armyworm, respectively. And at the concentration of 50 mg · L^-1, the bioassay result showed that new compound SYP-260 could be absorbed by host plant roots. The temperature bioassay result indicated that new compound SYP-260 was a positive temperature coefficient chemical. So new compound SYP-260 had excellent biological activity against nine different insect targets, such as broad bean aphid, green peach aphid and carmine spider mite. Moreover, this new compound had systemic action, too. Therefore, new compound SYP-260 had good bioactivity against many kinds of insect targets with novel chemical structures.