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.

新化合物SYP-260对刺吸式口器害虫的田间防治效果

[目的]明确新化合物SYP-260对不同刺吸式口器害虫的田间防治效果。[方法]主要采用喷雾法测定了新化合物SYP-260在田间对不同靶标的防治效果。[结果]田间药效试验结果表明:在50~100 mg/L质量浓度下,新化合物SYP-260对萝卜蚜、棉蚜、大豆蚜、锈线菊蚜,药后3~14 d的防效均在85%以上,对以上害虫具有较好的速效性和持效性;在100 mg/L质量浓度下,新化合物SYP-260对茶小绿叶蝉和柑橘木虱,药后3~14 d的防效均在70%以上,对以上害虫也具有较好的速效性和持效性;在100 mg/L质量浓度下,新化合物SYP-260对烟粉虱,药后3~7 d的防效在60%以上,对烟粉虱具有较好的速效性。[结论]新化合物SYP-260能够有效防治萝卜蚜、棉蚜、大豆蚜、锈线菊蚜、茶小绿叶蝉、柑橘木虱、烟粉虱等刺吸式口器害虫,田间观察发现SYP-260对不同靶标害虫的作用速度较快,并具有较好的持续性,田间推荐使用的质量浓度为50~100 mg/L。